GEK-113610A
GE
Digital Energy
EPM 7100 Electronic
Submeter
Instruction Manual
Software Revision: 1.1
Manual P/N: 1601-0035-A2
Manual Order Code: GEK-113610A
*1601-0035-A2*
LISTED
Copyright © 2015 GE Multilin Inc. All rights reserved.
EPM 7100 Electronic Submeter Instruction Manual for product revision 1.1.
The contents of this manual are the property of GE Multilin Inc. This documentation is
furnished on license and may not be reproduced in whole or in part without the permission
of GE Multilin. The manual is for informational use only and is subject to change without
notice.
Part number: 1601-0035-A2 (September 2015)
For further assistance
For product support, contact the information and call center as follows:
GE Digital Energy
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Worldwide telephone: +1 905 927 7070
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Fax: +1 905 927 5098
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Website: http://www.gedigitalenergy.com/multilin
Warranty
For products shipped as of 1 October 2013, GE Digital Energy warrants most of its GE
manufactured products for 10 years. For warranty details including any limitations and
disclaimers, see the GE Digital Energy Terms and Conditions at
https://www.gedigitalenergy.com/multilin/warranty.htm
For products shipped before 1 October 2013, the standard 24-month warranty applies.
ii
GENERAL SAFETY PRECAUTIONS
• Failure to observe and follow the instructions provided in the equipment manual(s)
could cause irreversible damage to the equipment and could lead to property
damage, personal injury and/or death.
• Before attempting to use the equipment, it is important that all danger and
caution indicators are reviewed.
• If the equipment is used in a manner not specified by the manufacturer or
functions abnormally, proceed with caution. Otherwise, the protection provided by
the equipment may be impaired and can result in Impaired operation and injury.
• Caution: Hazardous voltages can cause shock, burns or death.
• Installation/service personnel must be familiar with general device test practices,
electrical awareness and safety precautions must be followed.
• Before performing visual inspections, tests, or periodic maintenance on this device
or associated circuits, isolate or disconnect all hazardous live circuits and sources
of electric power.
• Failure to shut equipment off prior to removing the power connections could
expose you to dangerous voltages causing injury or death.
• All recommended equipment that should be grounded and must have a reliable
and un-compromised grounding path for safety purposes, protection against
electromagnetic interference and proper device operation.
• Equipment grounds should be bonded together and connected to the facility’s
main ground system for primary power.
• Keep all ground leads as short as possible.
• At all times, equipment ground terminal must be grounded during device
operation and service.
• In addition to the safety precautions mentioned all electrical connections made
must respect the applicable local jurisdiction electrical code.
• Before working on CTs, they must be short-circuited.
iii
FCC
This device complies with FCC Rules Part 15 and Industry Canada RSS-210 (Rev. 7).
Operation is subject to the following two conditions:
1.
This device may not cause harmful interference.
2.
This device must accept any interference, including interference that may
cause undesired operation of the device.
L’appareil conforme aux CNR d'Industrie Canada applicables aux appareils radio
exempts de licence. L'exploitation est autorisé aux deux conditions suivantes:
1.
L'appareil ne doit pas produire de brouillage.
2.
L'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi,
même si le brouillage est susceptible d'en compromettre le
fonctionnement.
The antenna provided must not be replaced with a different type. Attaching a different
antenna will void the FCC approval, and the FCC ID can no longer be considered.
This product cannot be disposed of as unsorted municipal waste in the European
Union. For proper recycling return this product to your supplier or a designated
collection point. For more information go to www.recyclethis.info.
Safety words and definitions
The following symbols used in this document indicate the following conditions
Indicates a hazardous situation which, if not avoided, will result in death or serious
injury.
Note
Indicates a hazardous situation which, if not avoided, could result in death or serious
injury.
Note
Indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
Note
Indicates practices not related to personal injury.
Note
Note
NOTE
iv
Indicates general information and practices, including operational information, that
are not related to personal injury.
Table of Contents
1: THREE-PHASE POWER
MEASUREMENT
THREE PHASE SYSTEM CONFIGURATIONS ........................................................................... 1-1
WYE CONNECTION .......................................................................................................................... 1-1
DELTA CONNECTION ...................................................................................................................... 1-3
BLONDEL’S THEOREM AND THREE PHASE MEASUREMENT ......................................... 1-4
POWER, ENERGY AND DEMAND ............................................................................................... 1-6
REACTIVE ENERGY AND POWER FACTOR ............................................................................. 1-9
HARMONIC DISTORTION .............................................................................................................. 1-11
POWER QUALITY .............................................................................................................................. 1-13
2: OVERVIEW AND
SPECIFICATIONS
HARDWARE OVERVIEW ................................................................................................................. 2-1
ORDER CODES ..................................................................................................................... 2-2
MEASURED VALUES ............................................................................................................ 2-2
UTILITY PEAK DEMAND ....................................................................................................... 2-3
SPECIFICATIONS ............................................................................................................................... 2-3
ACCURACY (FOR FULL RATING SPECIFICATIONS, SEE SECTION 2.2) ......................... 2-7
3: MECHANICAL
INSTALLATION
OVERVIEW ........................................................................................................................................... 3-1
INSTALL THE BASE ........................................................................................................................... 3-1
MOUNTING DIAGRAMS ....................................................................................................... 3-3
SECURE THE COVER ........................................................................................................................ 3-4
4: ELECTRICAL
INSTALLATION
CONSIDERATIONS WHEN INSTALLING METERS ................................................................. 4-1
ELECTRICAL CONNECTIONS ........................................................................................................ 4-3
GROUND CONNECTIONS .............................................................................................................. 4-4
VOLTAGE FUSES ............................................................................................................................... 4-4
ELECTRICAL CONNECTION DIAGRAMS .................................................................................. 4-4
5: COMMUNICATION
INSTALLATION
EPM 7100 METER COMMUNICATION ...................................................................................... 5-1
IRDA PORT (COM 1) ........................................................................................................... 5-1
RS485 COMMUNICATION COM 2 (485 OPTION) .......................................................... 5-2
KYZ OUTPUT ....................................................................................................................... 5-3
ETHERNET CONNECTION .................................................................................................... 5-4
METER COMMUNICATION AND PROGRAMMING OVERVIEW ....................................... 5-5
CONNECTING TO THE METER ............................................................................................. 5-6
EPM 7100 METER DEVICE PROFILE SETTINGS ............................................................. 5-10
6: ETHERNET
CONNECTION
CONFIGURATION
INTRODUCTION ................................................................................................................................ 6-1
SETTING UP THE HOST PC TO COMMUNICATE WITH EPM 7100 METER ................. 6-1
CONFIGURING THE HOST PC’S ETHERNET ADAPTER USING WINDOWS XP© ......... 6-2
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER ............................... 6-4
CONFIGURING THE ETHERNET MODULE IN THE EPM 7100 METER USING WINDOWS XP© ON
THE HOST COMPUTER ......................................................................................................... 6-5
EXAMPLE OF MODIFYING PARAMETERS IN GROUPS 1, 6, AND 7 ................................ 6-8
NETWORK MODULE HARDWARE INITIALIZATION ............................................................. 6-11
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
TOC–1
7: USING THE EPM 7100
METER
INTRODUCTION ................................................................................................................................ 7-1
UNDERSTANDING METER FACE ELEMENTS ...................................................................... 7-1
UNDERSTANDING METER FACE BUTTONS ....................................................................... 7-2
USING THE FRONT PANEL ............................................................................................................ 7-2
UNDERSTANDING STARTUP AND DEFAULT DISPLAYS .................................................... 7-3
USING THE MAIN MENU .................................................................................................... 7-3
USING RESET MODE ........................................................................................................... 7-4
ENTERING A PASSWORD ..................................................................................................... 7-5
USING CONFIGURATION MODE ......................................................................................... 7-6
USING OPERATING MODE .................................................................................................. 7-11
UNDERSTANDING THE % OF LOAD BAR ............................................................................... 7-12
WATT-HOUR ACCURACY TESTING (VERIFICATION) ........................................................... 7-13
A: NAVIGATION MAPS
FOR THE EPM 7100
METER
................................................................................................................................................................... INTRODUCTION ....................................................................................................................................................... A-1
NAVIGATION MAPS ......................................................................................................................... A-1
NAVIGATION OVERVIEW: MAIN MENU SCREENS (SHEET 1) ......................................... A-2
OPERATING MODE SCREENS (SHEET 2) ........................................................................... A-3
RESET MODE SCREENS (SHEET 3) .................................................................................... A-4
CONFIGURATION MODE SCREENS (SHEET 4) .................................................................. A-5
B: MODBUS MAPPING &
LOG RETRIEVAL FOR THE
EPM 7100 METER
INTRODUCTION ................................................................................................................................ B-1
MODBUS REGISTER MAP SECTIONS ........................................................................................ B-1
DATA FORMATS ................................................................................................................................ B-2
................................................................................................................................................................... FLOATING POINT VALUES .......................................................................................................................... B-2
RETRIEVING LOGS USING THE MODBUS MAP ..................................................................... B-3
DATA FORMATS ................................................................................................................... B-3
EPM 7100 METER LOGS .................................................................................................. B-3
BLOCK DEFINITIONS ............................................................................................................ B-4
LOG RETRIEVAL .................................................................................................................... B-10
LOG RECORD INTERPRETATION ......................................................................................... B-18
EXAMPLES ............................................................................................................................. B-23
IMPORTANT NOTE CONCERNING THE EPM 7100 MODBUS MAP ............................... B-26
HEX REPRESENTATION ........................................................................................................ B-26
DECIMAL REPRESENTATION ................................................................................................ B-26
MODBUS REGISTER MAP .............................................................................................................. B-27
C: USING DNP MAPPING
FOR THE EPM 7100
METER
OVERVIEW ........................................................................................................................................... C-1
PHYSICAL LAYER ............................................................................................................................... C-1
DATA LINK LAYER ............................................................................................................................. C-1
APPLICATION LAYER ....................................................................................................................... C-2
ERROR REPLY ..................................................................................................................................... C-3
DNP REGISTER MAP ........................................................................................................................ C-3
DNP MESSAGE LAYOUTS .............................................................................................................. C-6
INTERNAL INDICATION BITS ........................................................................................................ C-9
D: MANUAL REVISION
HISTORY
RELEASE NOTES ................................................................................................................................ D-1
TOC–2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 1: Three-Phase Power
Measurement
Three-Phase Power Measurement
This introduction to three-phase power and power measurement is intended to
provide only a brief overview of the subject. The professional meter engineer or meter
technician should refer to more advanced documents such as the EEI Handbook for
Electricity Metering and the application standards for more in-depth and technical
coverage of the subject.
1.1
Three Phase System Configurations
Three-phase power is most commonly used in situations where large amounts of
power will be used because it is a more effective way to transmit the power and
because it provides a smoother delivery of power to the end load. There are two
commonly used connections for three-phase power, a wye connection or a delta
connection. Each connection has several different manifestations in actual use.
When attempting to determine the type of connection in use, it is a good practice to
follow the circuit back to the transformer that is serving the circuit. It is often not
possible to conclusively determine the correct circuit connection simply by counting
the wires in the service or checking voltages. Checking the transformer connection will
provide conclusive evidence of the circuit connection and the relationships between
the phase voltages and ground.
1.2
Wye Connection
The wye connection is so called because when you look at the phase relationships and
the winding relationships between the phases it looks like a Y. Figure 1.1 depicts the
winding relationships for a wye-connected service. In a wye service the neutral (or
center point of the wye) is typically grounded. This leads to common voltages of 208/
120 and 480/277 (where the first number represents the phase-to-phase voltage and
the second number represents the phase-to-ground voltage).
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–1
WYE CONNECTION
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
VC
Phase 3
N
Phase 1
Phase 2
VB
VA
Figure 1-1: Three-phase Wye Winding
The three voltages are separated by 120o electrically. Under balanced load conditions
the currents are also separated by 120o. However, unbalanced loads and other
conditions can cause the currents to depart from the ideal 120o separation. Threephase voltages and currents are usually represented with a phasor diagram. A phasor
diagram for the typical connected voltages and currents is shown in Figure 1.2.
VC
IC
N
IA
VB
IB
VA
Figure 1-2: Phasor Diagram Showing Three-phase Voltages and Currents
The phasor diagram shows the 120o angular separation between the phase voltages.
The phase-to-phase voltage in a balanced three-phase wye system is 1.732 times the
phase-to-neutral voltage. The center point of the wye is tied together and is typically
grounded. Table 1.1 shows the common voltages used in the United States for wyeconnected systems.
Table 1.1: Common Phase Voltages on Wye Services
1–2
Phase to Ground Voltage
Phase to Phase Voltage
120 volts
208 volts
277 volts
480 volts
2,400 volts
4,160 volts
7,200 volts
12,470 volts
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
DELTA CONNECTION
Table 1.1: Common Phase Voltages on Wye Services
Phase to Ground Voltage
Phase to Phase Voltage
7,620 volts
13,200 volts
Usually a wye-connected service will have four wires: three wires for the phases and
one for the neutral. The three-phase wires connect to the three phases (as shown in
Figure 1.1). The neutral wire is typically tied to the ground or center point of the wye.
In many industrial applications the facility will be fed with a four-wire wye service but
only three wires will be run to individual loads. The load is then often referred to as a
delta-connected load but the service to the facility is still a wye service; it contains
four wires if you trace the circuit back to its source (usually a transformer). In this type
of connection the phase to ground voltage will be the phase-to-ground voltage
indicated in Table 1, even though a neutral or ground wire is not physically present at
the load. The transformer is the best place to determine the circuit connection type
because this is a location where the voltage reference to ground can be conclusively
identified.
1.3
Delta Connection
Delta-connected services may be fed with either three wires or four wires. In a threephase delta service the load windings are connected from phase-to-phase rather
than from phase-to-ground. Figure 1.3 shows the physical load connections for a
delta service.
VC
Phase 2
VB
Phase 3
Phase 1
VA
Figure 1-3: Three-phase Delta Winding Relationship
In this example of a delta service, three wires will transmit the power to the load. In a
true delta service, the phase-to-ground voltage will usually not be balanced because
the ground is not at the center of the delta.
Figure 1.4 shows the phasor relationships between voltage and current on a threephase delta circuit.
In many delta services, one corner of the delta is grounded. This means the phase to
ground voltage will be zero for one phase and will be full phase-to-phase voltage for
the other two phases. This is done for protective purposes.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–3
BLONDEL’S THEOREM AND THREE PHASE MEASUREMENT
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
VBC
VCA
IC
IA
IB
VAB
Figure 1-4: Phasor Diagram, Three-Phase Voltages and Currents, Delta-Connected
Another common delta connection is the four-wire, grounded delta used for lighting
loads. In this connection the center point of one winding is grounded. On a 120/240
volt, four-wire, grounded delta service the phase-to-ground voltage would be 120
volts on two phases and 208 volts on the third phase. Figure 1.5 shows the phasor
diagram for the voltages in a three-phase, four-wire delta system.
VC
VCA
VBC
N
VA
VAB
VB
Figure 1-5: Phasor Diagram Showing Three-phase Four-Wire Delta-Connected System
1.4
Blondel’s Theorem and Three Phase Measurement
In 1893 an engineer and mathematician named Andre E. Blondel set forth the first
scientific basis for polyphase metering. His theorem states:
If energy is supplied to any system of conductors through N wires, the total power in
the system is given by the algebraic sum of the readings of N wattmeters so arranged
that each of the N wires contains one current coil, the corresponding potential coil
being connected between that wire and some common point. If this common point is
on one of the N wires, the measurement may be made by the use of N-1 Wattmeters.
1–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
BLONDEL’S THEOREM AND THREE PHASE MEASUREMENT
The theorem may be stated more simply, in modern language:
In a system of N conductors, N-1 meter elements will measure the power or energy
taken provided that all the potential coils have a common tie to the conductor in
which there is no current coil.
Three-phase power measurement is accomplished by measuring the three individual
phases and adding them together to obtain the total three phase value. In older
analog meters, this measurement was accomplished using up to three separate
elements. Each element combined the single-phase voltage and current to produce a
torque on the meter disk. All three elements were arranged around the disk so that the
disk was subjected to the combined torque of the three elements. As a result the disk
would turn at a higher speed and register power supplied by each of the three wires.
According to Blondel's Theorem, it was possible to reduce the number of elements
under certain conditions. For example, a three-phase, three-wire delta system could
be correctly measured with two elements (two potential coils and two current coils) if
the potential coils were connected between the three phases with one phase in
common.
In a three-phase, four-wire wye system it is necessary to use three elements. Three
voltage coils are connected between the three phases and the common neutral
conductor. A current coil is required in each of the three phases.
In modern digital meters, Blondel's Theorem is still applied to obtain proper
metering. The difference in modern meters is that the digital meter measures each
phase voltage and current and calculates the single-phase power for each phase. The
meter then sums the three phase powers to a single three-phase reading.
Some digital meters measure the individual phase power values one phase at a time.
This means the meter samples the voltage and current on one phase and calculates a
power value. Then it samples the second phase and calculates the power for the
second phase. Finally, it samples the third phase and calculates that phase power.
After sampling all three phases, the meter adds the three readings to create the
equivalent three-phase power value. Using mathematical averaging techniques, this
method can derive a quite accurate measurement of three-phase power.
More advanced meters actually sample all three phases of voltage and current
simultaneously and calculate the individual phase and three-phase power values. The
advantage of simultaneous sampling is the reduction of error introduced due to the
difference in time when the samples were taken.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–5
POWER, ENERGY AND DEMAND
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
C
B
Phase B
Phase C
Node "n"
Phase A
A
N
Figure 1-6: Three-Phase Wye Load Illustrating Kirchoff’s Law and Blondel’s Theorem
Blondel's Theorem is a derivation that results from Kirchoff's Law. Kirchoff's Law states
that the sum of the currents into a node is zero. Another way of stating the same thing
is that the current into a node (connection point) must equal the current out of the
node. The law can be applied to measuring three-phase loads. Figure 1.6 shows a
typical connection of a three-phase load applied to a three-phase, four-wire service.
Kirchoff's Law holds that the sum of currents A, B, C and N must equal zero or that the
sum of currents into Node "n" must equal zero.
If we measure the currents in wires A, B and C, we then know the current in wire N by
Kirchoff's Law and it is not necessary to measure it. This fact leads us to the
conclusion of Blondel's Theorem- that we only need to measure the power in three of
the four wires if they are connected by a common node. In the circuit of Figure 1.6 we
must measure the power flow in three wires. This will require three voltage coils and
three current coils (a three-element meter). Similar figures and conclusions could be
reached for other circuit configurations involving Delta-connected loads.
1.5
Power, Energy and Demand
It is quite common to exchange power, energy and demand without differentiating
between the three. Because this practice can lead to confusion, the differences
between these three measurements will be discussed.
Power is an instantaneous reading. The power reading provided by a meter is the
present flow of watts. Power is measured immediately just like current. In many digital
meters, the power value is actually measured and calculated over a one second
interval because it takes some amount of time to calculate the RMS values of voltage
and current. But this time interval is kept small to preserve the instantaneous nature
of power.
Energy is always based on some time increment; it is the integration of power over a
defined time increment. Energy is an important value because almost all electric bills
are based, in part, on the amount of energy used.
1–6
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
POWER, ENERGY AND DEMAND
Typically, electrical energy is measured in units of kilowatt-hours (kWh). A kilowatthour represents a constant load of one thousand watts (one kilowatt) for one hour.
Stated another way, if the power delivered (instantaneous watts) is measured as 1,000
watts and the load was served for a one hour time interval then the load would have
absorbed one kilowatt-hour of energy. A different load may have a constant power
requirement of 4,000 watts. If the load were served for one hour it would absorb four
kWh. If the load were served for 15 minutes it would absorb ¼ of that total or one
kWh.
Figure 1.7 shows a graph of power and the resulting energy that would be transmitted
as a result of the illustrated power values. For this illustration, it is assumed that the
power level is held constant for each minute when a measurement is taken. Each bar
in the graph will represent the power load for the one-minute increment of time. In
real life the power value moves almost constantly.
The data from Figure 1.7 is reproduced in Table 1.2 to illustrate the calculation of
energy. Since the time increment of the measurement is one minute and since we
specified that the load is constant over that minute, we can convert the power
reading to an equivalent consumed energy reading by multiplying the power reading
times 1/60 (converting the time base from minutes to hours).
80
70
kilowat t s
60
50
40
30
20
10
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Time (minutes)
Figure 1-7: Power Use over Time
Table 1.2: Power and Energy Relationship over Time
Time Interval
(minute)
Power (kW)
Energy (kWh)
Accumulated Energy
(kWh)
1
30
0.50
0.50
2
50
0.83
1.33
3
40
0.67
2.00
4
55
0.92
2.92
5
60
1.00
3.92
6
60
1.00
4.92
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–7
POWER, ENERGY AND DEMAND
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
Table 1.2: Power and Energy Relationship over Time
Time Interval
(minute)
Power (kW)
Energy (kWh)
Accumulated Energy
(kWh)
7
70
1.17
6.09
8
70
1.17
7.26
9
60
1.00
8.26
10
70
1.17
9.43
11
80
1.33
10.76
12
50
0.83
12.42
13
50
0.83
12.42
14
70
1.17
13.59
15
80
1.33
14.92
As in Table 1.2, the accumulated energy for the power load profile of Figure 1.7 is
14.92 kWh.
Demand is also a time-based value. The demand is the average rate of energy use
over time. The actual label for demand is kilowatt-hours/hour but this is normally
reduced to kilowatts. This makes it easy to confuse demand with power, but demand
is not an instantaneous value. To calculate demand it is necessary to accumulate the
energy readings (as illustrated in Figure 1.7) and adjust the energy reading to an
hourly value that constitutes the demand.
In the example, the accumulated energy is 14.92 kWh. But this measurement was
made over a 15-minute interval. To convert the reading to a demand value, it must be
normalized to a 60-minute interval. If the pattern were repeated for an additional
three 15-minute intervals the total energy would be four times the measured value or
59.68 kWh. The same process is applied to calculate the 15-minute demand value.
The demand value associated with the example load is 59.68 kWh/hr or 59.68 kWd.
Note that the peak instantaneous value of power is 80 kW, significantly more than the
demand value.
Figure 1.8 shows another example of energy and demand. In this case, each bar
represents the energy consumed in a 15-minute interval. The energy use in each
interval typically falls between 50 and 70 kWh. However, during two intervals the
energy rises sharply and peaks at 100 kWh in interval number 7. This peak of usage
will result in setting a high demand reading. For each interval shown the demand
value would be four times the indicated energy reading. So interval 1 would have an
associated demand of 240 kWh/hr. Interval 7 will have a demand value of 400 kWh/
hr. In the data shown, this is the peak demand value and would be the number that
would set the demand charge on the utility bill.
1–8
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
REACTIVE ENERGY AND POWER FACTOR
100
kilowat t-hours
80
60
40
20
0
1
2
3
4
5
6
Intervals (15 mins.)
7
8
Figure 1-8: Energy Use and Demand
As can be seen from this example, it is important to recognize the relationships
between power, energy and demand in order to control loads effectively or to monitor
use correctly.
1.6
Reactive Energy and Power Factor
The real power and energy measurements discussed in the previous section relate to
the quantities that are most used in electrical systems. But it is often not sufficient to
only measure real power and energy. Reactive power is a critical component of the
total power picture because almost all real-life applications have an impact on
reactive power. Reactive power and power factor concepts relate to both load and
generation applications. However, this discussion will be limited to analysis of reactive
power and power factor as they relate to loads. To simplify the discussion, generation
will not be considered.
Real power (and energy) is the component of power that is the combination of the
voltage and the value of corresponding current that is directly in phase with the
voltage. However, in actual practice the total current is almost never in phase with the
voltage. Since the current is not in phase with the voltage, it is necessary to consider
both the inphase component and the component that is at quadrature (angularly
rotated 90o or perpendicular) to the voltage. Figure 1.9 shows a single-phase voltage
and current and breaks the current into its in-phase and quadrature components.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–9
REACTIVE ENERGY AND POWER FACTOR
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
IR
V
0
IX
I
Figure 1-9: Voltage and Complex Current
The voltage (V) and the total current (I) can be combined to calculate the apparent
power or VA. The voltage and the in-phase current (IR) are combined to produce the
real power or watts. The voltage and the quadrature current (IX) are combined to
calculate the reactive power.
The quadrature current may be lagging the voltage (as shown in Figure 1.9) or it may
lead the voltage. When the quadrature current lags the voltage the load is requiring
both real power (watts) and reactive power (VARs). When the quadrature current leads
the voltage the load is requiring real power (watts) but is delivering reactive power
(VARs) back into the system; that is VARs are flowing in the opposite direction of the
real power flow.
Reactive power (VARs) is required in all power systems. Any equipment that uses
magnetization to operate requires VARs. Usually the magnitude of VARs is relatively
low compared to the real power quantities. Utilities have an interest in maintaining
VAR requirements at the customer to a low value in order to maximize the return on
plant invested to deliver energy. When lines are carrying VARs, they cannot carry as
many watts. So keeping the VAR content low allows a line to carry its full capacity of
watts. In order to encourage customers to keep VAR requirements low, some utilities
impose a penalty if the VAR content of the load rises above a specified value.
A common method of measuring reactive power requirements is power factor. Power
factor can be defined in two different ways. The more common method of calculating
power factor is the ratio of the real power to the apparent power. This relationship is
expressed in the following formula:
Total PF = real power / apparent power = watts/VA
This formula calculates a power factor quantity known as Total Power Factor. It is
called Total PF because it is based on the ratios of the power delivered. The delivered
power quantities will include the impacts of any existing harmonic content. If the
voltage or current includes high levels of harmonic distortion the power values will be
affected. By calculating power factor from the power values, the power factor will
include the impact of harmonic distortion. In many cases this is the preferred method
of calculation because the entire impact of the actual voltage and current are
included.
1–10
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
HARMONIC DISTORTION
A second type of power factor is Displacement Power Factor. Displacement PF is
based on the angular relationship between the voltage and current. Displacement
power factor does not consider the magnitudes of voltage, current or power. It is solely
based on the phase angle differences. As a result, it does not include the impact of
harmonic distortion. Displacement power factor is calculated using the following
equation:
Displacement PF = cos θ
where q is the angle between the voltage and the current (see Fig. 1.9).
In applications where the voltage and current are not distorted, the Total Power
Factor will equal the Displacement Power Factor. But if harmonic distortion is present,
the two power factors will not be equal.
1.7
Harmonic Distortion
Harmonic distortion is primarily the result of high concentrations of non-linear loads.
Devices such as computer power supplies, variable speed drives and fluorescent light
ballasts make current demands that do not match the sinusoidal waveform of AC
electricity. As a result, the current waveform feeding these loads is periodic but not
sinusoidal. Figure 1.10 shows a normal, sinusoidal current waveform. This example
has no distortion.
1000
0
Amps
500
Time
– 500
– 1000
Figure 1-10: Nondistorted Current Waveform
Figure 1.11 shows a current waveform with a slight amount of harmonic distortion.
The waveform is still periodic and is fluctuating at the normal 60 Hz frequency.
However, the waveform is not a smooth sinusoidal form as seen in Figure 1.10.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–11
HARMONIC DISTORTION
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
1500
1000
Current (amps)
500
t
0
a
2a
–500
–1000
–1500
Figure 1-11: Distorted Current Waveform
The distortion observed in Figure 1.11 can be modeled as the sum of several
sinusoidal waveforms of frequencies that are multiples of the fundamental 60 Hz
frequency. This modeling is performed by mathematically disassembling the distorted
waveform into a collection of higher frequency waveforms.
These higher frequency waveforms are referred to as harmonics. Figure 1.12 shows
the content of the harmonic frequencies that make up the distortion portion of the
waveform in Figure 1.11.
1000
0
Amps
500
Time
3rd harmonic
5th harmonic
– 500
7th harmonic
Total
fundamental
Figure 1-12: Waveforms of the Harmonics
The waveforms shown in Figure 1.12 are not smoothed but do provide an indication of
the impact of combining multiple harmonic frequencies together.
When harmonics are present it is important to remember that these quantities are
operating at higher frequencies. Therefore, they do not always respond in the same
manner as 60 Hz values.
1–12
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
POWER QUALITY
Inductive and capacitive impedance are present in all power systems. We are
accustomed to thinking about these impedances as they perform at 60 Hz. However,
these impedances are subject to frequency variation.
XL = jwL and
XC = 1/jwC
At 60 Hz, w = 377; but at 300 Hz (5th harmonic) w = 1,885. As frequency changes
impedance changes and system impedance characteristics that are normal at 60 Hz
may behave entirely differently in the presence of higher order harmonic waveforms.
Traditionally, the most common harmonics have been the low order, odd frequencies,
such as the 3rd, 5th, 7th, and 9th. However newer, non-linear loads are introducing
significant quantities of higher order harmonics.
Since much voltage monitoring and almost all current monitoring is performed using
instrument transformers, the higher order harmonics are often not visible. Instrument
transformers are designed to pass 60 Hz quantities with high accuracy. These devices,
when designed for accuracy at low frequency, do not pass high frequencies with high
accuracy; at frequencies above about 1200 Hz they pass almost no information. So
when instrument transformers are used, they effectively filter out higher frequency
harmonic distortion making it impossible to see.
However, when monitors can be connected directly to the measured circuit (such as
direct connection to a 480 volt bus) the user may often see higher order harmonic
distortion. An important rule in any harmonics study is to evaluate the type of
equipment and connections before drawing a conclusion. Not being able to see
harmonic distortion is not the same as not having harmonic distortion.
It is common in advanced meters to perform a function commonly referred to as
waveform capture. Waveform capture is the ability of a meter to capture a present
picture of the voltage or current waveform for viewing and harmonic analysis.
Typically a waveform capture will be one or two cycles in duration and can be viewed
as the actual waveform, as a spectral view of the harmonic content, or a tabular view
showing the magnitude and phase shift of each harmonic value. Data collected with
waveform capture is typically not saved to memory. Waveform capture is a real-time
data collection event.
Waveform capture should not be confused with waveform recording that is used to
record multiple cycles of all voltage and current waveforms in response to a transient
condition.
1.8
Power Quality
Power quality can mean several different things. The terms “power quality” and
“power quality problem” have been applied to all types of conditions. A simple
definition of “power quality problem” is any voltage, current or frequency deviation
that results in mis-operation or failure of customer equipment or systems. The causes
of power quality problems vary widely and may originate in the customer equipment,
in an adjacent customer facility or with the utility.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1–13
POWER QUALITY
CHAPTER 1: THREE-PHASE POWER MEASUREMENT
In his book Power Quality Primer, Barry Kennedy provided information on different
types of power quality problems. Some of that information is summarized in Table 1.3.
Table 1.3: Typical Power Quality Problems and Sources
Cause
Disturbance Type
Source
Impulse transient
Transient voltage disturbance,
sub-cycle duration
Lightning
Electrostatic discharge
Load switching
Capacitor switching
Oscillatory
transient with decay
Transient voltage, sub-cycle
duration
Line/cable switching
Capacitor switching
Load switching
Sag/swell
RMS voltage, multiple cycle
duration
Remote system faults
Interruptions
RMS voltage, multiple
seconds or longer duration
System protection
Circuit breakers
Fuses
Maintenance
Under voltage/over
voltage
RMS voltage, steady state, multiple
seconds or longer
duration
Motor starting
Load variations
Load dropping
Voltage flicker
RMS voltage, steady state,
repetitive condition
Intermittent loads
Motor starting
Arc furnaces
Harmonic distortion
Steady state current or voltage,
long-term duration
Non-linear loads
System resonance
It is often assumed that power quality problems originate with the utility. While it is
true that power quality problems can originate with the utility system, many problems
originate with customer equipment. Customer-caused problems may manifest
themselves inside the customer location or they may be transported by the utility
system to another adjacent customer. Often, equipment that is sensitive to power
quality problems may in fact also be the cause of the problem.
If a power quality problem is suspected, it is generally wise to consult a power quality
professional for assistance in defining the cause and possible solutions to the
problem.
1–14
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 2: Overview and
Specifications
Overview and Specifications
2.1
Hardware Overview
The EPM 7100 multifunction submeter is designed to measure revenue grade electrical
energy usage and transmit that information via various communication media. The unit
supports RS485, RJ-45 Ethernet or IEEE 802.11 Wi-Fi Ethernet connections. This allows it to
be placed anywhere within a complex and to communicate back to central software
quickly and easily. The unit also has an IrDA Port for direct PDA interface.
The EPM 7100 meter features advanced measurement capabilities, allowing it to achieve
high performance accuracy. The submeter is specified as a 0.2% class energy meter
(Current Class 10 only) for billing applications. The EPM 7100 meter is a traceable revenue
meter and contains a utility grade test pulse to verify rated accuracy.
To be certified for revenue metering, power providers and utility companies have to verify
that this billing energy submeter will perform to the stated accuracy. To confirm the
submeter’s performance and calibration, power providers use field test standards to
ensure that the unit’s energy measurements are correct.
The EPM 7100 meter has up to 2 MegaBytes* for datalogging. It offers three historical logs,
a Limits (Alarm) log, and a System Events log.
*Because the memory is flash-based rather than NVRAM (non-volatile random-access
Note
NOTE
memory), some sectors are reserved for overhead, erase procedures, and spare sectors for
long-term wear reduction.
EPM 7100 Meter features detailed in this manual are:
• 0.2% Class Revenue Certifiable Energy and Demand Submeter (Current Class 10
only)
• Meets ANSI C12.20 (0.2%) and IEC 62053-22 (Accuracy Class 0.2S)
• Multifunction Measurement including Voltage, Current, Power, Frequency, Energy,
etc.
• Bright Red LED Display Featuring Three, 56” Lines
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
2–1
HARDWARE OVERVIEW
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
• 2 MegaBytes Memory for Datalogging
• Real Time Clock for Time-Stamping of Logs
• Line Frequency Time Synchronization
• 0.001% Frequency Measurement for Generating Stations
• Interval Energy Logging
• Percentage of Load Bar for Analog Meter Perception
• Modbus RTU and Modbus TCP (Over Ethernet)
• Serial RS485 Communication
• Ethernet and Wireless Ethernet (Wi-Fi)
• Easy-to-Use Faceplate Programming
• IrDA Port for PDA Remote Read
• Direct Interface with Most Building Management Systems
• DNP 3.0
The EPM 7100 submeter uses standard 5 or 1 Amp CTs (either split or donut). It surface
mounts to any wall and is easily programmed in minutes. The unit is designed specifically
for easy installation and advanced communication.
2.1.1
Order Codes
Table 2–1: EPM 7100 Order Codes
Base Unit
PL7100 –
*
PL7100
|
|
|
|
|
5
6
|
|
5A
1A
|
|
|
|
B
|
|
|
|
|
Hi
|
|
|
|
|
|
S
W
System Frequency
Current Input
–
*
–
Software
Power Supply
B
–
HI
–
Communications Option
2.1.2
*
All current/voltage/power/energy counters measurement, %
load bar, RS 485 and IrDA ports and one front test pulse output.
50 Hz AC frequency system
60 Hz AC frequency system
5 Amp
1 Amp
Multi-function meter with 2MB datalogging
90 to 400 V AC / 100 to 370 V DC
RS485 Option
Wireless or LAN-based Ethernet
Measured Values
The EPM 7100 submeter provides the following Measured Values all in Real Time and some
additionally as Avg, Max and Min values.
Table 2–2: EPM 7100 Meter Measured Values.
Measured Values
2–2
Real Time
Avg
Max
Min
Voltage L-N
X
X
Voltage L-L
X
Current Per Phase
X
X
Current Neutral
X
X
Watts (A,B,C,Total)
X
X
X
X
VAR (A,B,C,Total)
X
X
X
X
X
X
X
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
SPECIFICATIONS
Measured Values
2.1.3
Real Time
Avg
Max
Min
VA (A,B,C,Total)
X
X
X
X
PF (A,B,C,Total)
X
X
X
X
X
X
+Watt-Hr (A,B,C,Tot)
X
- Watt-Hr (A,B,C,Tot)
X
Watt-Hr Net
X
+VAR-Hr (A,B,C,Tot)
X
-VAR-Hr (A,B,C,Tot)
X
VAR-Hr Net
X
VA-Hr (A,B,C,Total)
X
Frequency
X
Voltage Angles
X
Current Angles
X
% of Load Bar
X
Utility Peak Demand
The EPM 7100 meter provides user-configured Block (Fixed) Window or Rolling Window
Demand. This feature allows you to set up a Customized Demand Profile. Block Window
Demand is demand used over a user-configured demand period (usually 5, 15 or 30
minutes). Rolling Window Demand is a fixed window demand that moves for a userspecified subinterval period. For example, a 15-minute Demand using 3 subintervals and
providing a new demand reading every 5 minutes, based on the last 15 minutes.
Utility Demand Features can be used to calculate kW, kVAR, kVA and PF readings. All other
parameters offer Max and Min capability over the user-selectable averaging period.
Voltage provides an Instantaneous Max and Min reading which displays the highest surge
and lowest sag seen by the meter.
2.2
Specifications
POWER SUPPLY
Range: ............................................... Universal, (90 to 400)VAC @50/60Hz or (100 to 370)VDC
Power Consumption: .................. 16 VA Maximum
VOLTAGE INPUTS (MEASUREMENT CATEGORY III)
(For Accuracy Specifications, see Section 2.4.)
Absolute Maximum Range: ..... Universal, Autoranging:
Phase to Reference (Va, Vb, Vc, to VRef): (20 to 576)VAC
Phase to Phase (Va to Vb, Vb to Vc, Vc to Va): (0-721)VAC
Supported hookups: ................... 3 Element Wye, 2.5 Element Wye, 2 Element Delta, 4 Wire Delta
Input Impedance: ........................ 1M Ohm/Phase
Burden: .............................................. 0.36VA/Phase Max at 600V, 0.014VA at 120V
Pickup Voltage: ............................. 10VAC
Connection: .................................... 7 pin 0.400” Screw Terminal Block AWG#16 - 26/(0.129-3.31)mm2
Transient Withstand: .................. Meets IEEE C37.90.1 (Surge Withstand Capability)
Reading: ........................................... Programmable Full Scale to any PT Ratio
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
2–3
SPECIFICATIONS
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
CURRENT INPUTS
(For Accuracy Specifications, see Section 2.4.)
Class 10: ............................................5A Nominal, 10A Maximum
Class 2:................................................1A Nominal, 2A Maximum
Burden: ..............................................0.005VA Per Phase Max at 11 Amps
Pickup Current: ..............................0.1% of Nominal
Connections: ...................................Screw terminal - #6-32 screws (Figure 4.1)
Current Surge Withstand: .........100A/10sec.at 23°C.
Reading: ............................................Programmable Full Scale to any CT Ratio
ISOLATION
All Inputs and Outputs are galvanically isolated and tested to 2500VAC
ENVIRONMENTAL RATING
Storage: .............................................-20 to +60°C
Operating: ........................................-20 to +60°C
Humidity: ..........................................to 95% RH Non-condensing
Faceplate Rating: .........................NEMA1 (Indoor Use)
MEASUREMENT METHODS
Voltage, Current: ...........................RMS
Power: ................................................Sampling at over 400 Samples per Cycle on All Channels
A/D Conversion:..............................6 simultaneous 24 bit Analog to Digital Converters
UPDATE RATE
Watts, VAR and VA: ......................Every 6 cycles (e.g. 100ms @60Hz)
All other parameters: ..................Every 60 cycles (e.g. 1s @ 60Hz)
COMMUNICATION
1. RS485
2. IrDA Port through faceplate
Protocols: ..........................................Modbus RTU, Modbus ASCII, DNP 3.0, Modbus TCP (for Ethernet
enabled)
Com Port Baud Rate: ..................9600 to 57,600 b/s; RS485 Only: 1200, 2400, 4800*;
Com Port Address: .......................001-247
Data Format: ..................................8 Bit, No Parity (RS485: also Even or Odd Parity*)
*With Runtime Firmware Version 26 or higher
WIRELESS ETHERNET (OPTIONAL)
802.11b Wireless or RJ45 Connection: 10/100BaseT Ethernet
Wireless Security: ..........................64 or 128 bit WEP; WPA; or WPA2
Modbus TCP Protocol
MECHANICAL PARAMETERS
Dimensions:......................................(H7.9 x W7.6 x D3.2) inches, (H200.7 x W191.3 x D79) mm
Weight: ..............................................4 pounds
KYZ/RS485 PORT SPECIFICATIONS
RS485 Transceiver; meets or exceeds EIA/TIA-485 Standard:
Type: ....................................................Two-wire, half duplex
Min. Input Impedance: ................96kΩ
Max. Output Current: ...................±60mA
2–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
SPECIFICATIONS
WH PULSE
KYZ output contacts (and infrared LED light pulses through face plate; see Section 7.4 for
Kh values):
Pulse Width:..................................... 90ms
Full Scale Frequency: .................. ~3Hz
Contact type:................................... Solid State – SPDT (NO – C – NC)
Relay type:........................................ Solid state
Peak switching voltage: ............. DC ±350V
Continuous load current:........... 120mA
Peak load current: ........................ 350mA for 10ms
On resistance, max.: .................... 35Ω
Leakage current: ........................... 1µ[email protected]
Isolation:............................................ AC 3750V
Reset State:...................................... (NC - C) Closed; (NO - C) Open
Infrared LED:
Peak Spectral Wavelength: ...... 940nm
Reset State:...................................... Off
Figure 2-1: Internal Schematic
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
2–5
SPECIFICATIONS
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
Figure 2-2: Output Timing
2–6
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
ACCURACY (FOR FULL RATING SPECIFICATIONS, SEE SECTION 2.2)
COMPLIANCE
Test
Reference Standard
Level/Class
Electrostatic Discharge
EN/IEC61000-4-2
Level 3
RF immunity
EN/IEC61000-4-3
10V/m
Fast Transient Disturbance
EN/IEC61000-4-4
Level 3
Surge Immunity
EN/IEC61000-4-5
Level 3
Conducted RF Immunity
EN/IEC61000-4-6
Level 3
Radiated & Conducted Emissions
EN/IEC61000-6-4/
CISPR 11
Class A
Power magnetic frequency
EN/IEC61000-4-8
Level 4
Voltage Dip & interruption
EN/IEC61000-4-11
0, 40, 70, 80% dips, 250/300 cycle
interrupts
APPROVALS
Applicable Council Directive
CE compliance
According to:
Low voltage directive
EN/IEC61010-1
EMC Directive
EN61000-6-2
EN61000-6-4
North America
R&TTE Directive
EN300 328
cULus Listed
UL61010-1 (PICQ)
C22.2.No 61010-1 (PICQ7)
File e200431
ISO
2.3
Manufactured under a registered
quality program
ISO9001
Accuracy (For full Rating specifications, see Section 2.2)
Test conditions:
• 23°C
• 3-phase balanced load
• 50 or 60Hz (as per order)
• 5A (Class 10) Nominal unit
Parameter
Voltage L-N [V]
Voltage L-L [V]
Current Phase [A]
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
Accuracy
Accuracy Input Range1
0.1% of reading
(69 to 480)V
2
(120 to 600)V
1
(0.15 to 5)A
0.1% of reading
0.1% of reading
2–7
ACCURACY (FOR FULL RATING SPECIFICATIONS, SEE SECTION 2.2)
Parameter
CHAPTER 2: OVERVIEW AND SPECIFICATIONS
Accuracy
Accuracy Input Range1
Current Neutral
(Calculated) [A]
2.0% F.S. 1
(0.15 to 5)A @ (45-65)Hz
Active Power Total [W]
0.2% of reading1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Active Energy Total [Wh]
0.2% of reading1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Reactive Power Total
[VAR]
0.2% of reading
1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Reactive Energy Total
[VARh]
0.2% of reading1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Apparent Power Total [VA]
0.2% of reading1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Apparent Energy Total
[VAh]
0.2% of reading
1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Power Factor
0.2% of reading1,2
(0.15 to 5)A @ (69 to 480)V @ +/-(0.5 to 1) lag/lead PF
Frequency [Hz]
0.001Hz
(45 to 65)Hz
Load Bar
+/- 1 segment
(0.005 to 6)A
1
• For 2.5 element programmed units, degrade accuracy by an additional 0.5% of
reading.
• For 1A (Class 2) Nominal, degrade accuracy by an additional 0.5% of reading.
• For 1A (Class 2) Nominal input current range for accuracy specification is 20% of
the values listed in the table.
2
For unbalanced voltage inputs where at least one crosses the 150V autoscale threshold
(for example, 120V/120V/208V system), degrade the accuracy by an additional 0.4% of
reading.
2–8
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 3: Mechanical Installation
Mechanical Installation
3.1
Overview
•
The EPM 7100 meter can be installed on any wall. See Chapter 4 for wiring diagrams.
•
Mount the meter in a dry location, which is free from dirt and corrosive substances.
Recommended Tools for EPM 7100 Installation:
• #2 Phillips screwdriver
• Wire cutters
3.2
Install the Base
1.
Determine where you want to install the submeter.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
3–1
INSTALL THE BASE
CHAPTER 3: MECHANICAL INSTALLATION
2.
With the submeter power off, open the top of the submeter. Use the Front Cover
Support to keep the cover open as you perform the installation.
Figure 3-1: EPM 7100 Meter Opened
Note
Note
3–2
Remove the antenna before opening the unit.
Only use the front cover support if you are able to open the front cover to the extent that
you can fit the front cover support into its base. DO NOT rest the front cover support on the
inside of the meter, even for a short time - by doing so, you may damage components on
the board assembly.
3.
Find the 4 Installation Slots and insert screws through each slot into the wall or panel.
4.
Fasten securely. DO NOT overtighten.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 3: MECHANICAL INSTALLATION
3.2.1
INSTALL THE BASE
Mounting Diagrams
Figure 3-2: EPM 7100 Mounting
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
3–3
SECURE THE COVER
3.3
CHAPTER 3: MECHANICAL INSTALLATION
Secure the Cover
1.
Close the cover, making sure that power and communications wires exit the submeter
through the openings at the base.
Screw
Seal Housing
Figure 3-3: EPM 7100 Meter Closed
Note
To avoid damaging components on the board assembly, make sure the front cover support
is in the upright position before closing the front cover.
2.
Using the 3 enclosed screws, secure the cover to the base in three places.
Do not overtighten (you may damage the cover).
The unit can be sealed after the front cover is closed. To seal the unit, thread the seal tag
through the housing located between the bottom access holes.
3.
Re-attach the antenna, if appropriate.
Recommended Tools for EPM 7100 Meter Installation:
• #2 Phillips screwdriver
• 1/8” slotted-tip screwdriver
• Wire cutters.
3–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 4: Electrical Installation
Electrical Installation
4.1
Considerations When Installing Meters
POTENTIAL ELECTRICAL EXPOSURE - The EPM 7100/6010T must be installed in an
electrical enclosure where any access to live electrical wiring is restricted only to
authorized service personnel.
• Installation of the EPM 7100 meter must be performed by only qualified personnel
who follow standard safety precautions during all procedures. Those personnel
should have appropriate training and experience with high voltage devices.
Appropriate safety gloves, safety glasses and protective clothing are
recommended.
• During normal operation of the EPM 7100 meter, dangerous voltages flow through
many parts of the meter, including: Terminals and any connected CTs (Current
Transformers) and PTs (Potential Transformers), all I/O Modules (Inputs and
Outputs) and their circuits. All Primary and Secondary circuits can, at times,
produce lethal voltages and currents. Avoid contact with any current-carrying
surfaces.
• Before performing ANY work on the meter, make sure the meter is powered
down and all connected circuits are de-energized.
• Do not use the meter or any I/O Output Device for primary protection or in an
energy-limiting capacity. The meter can only be used as secondary protection.
• Do not use the meter for applications where failure of the meter may cause harm
or death. Do not use the meter for any application where there may be a risk of
fire.
• All meter terminals should be inaccessible after installation.
• Do not apply more than the maximum voltage the meter or any attached device
can withstand. Refer to meter and/or device labels and to the Specifications for all
devices before applying voltages. Do not HIPOT/Dielectric test any Outputs, Inputs
or Communications terminals.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
4–1
CONSIDERATIONS WHEN INSTALLING METERS
•
Note
CHAPTER 4: ELECTRICAL INSTALLATION
GE requires the use of Fuses for voltage leads and power supply and Shorting Blocks
to prevent hazardous voltage conditions or damage to CTs, if the meter needs to be
removed from service. CT grounding is optional, but recommended.
The current inputs are only to be connected to external current transformers provided
by the installer. The CT's shall be Listed or Approved and rated for the current of the
meter used.
If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Note
There is no required preventive maintenance or inspection necessary for safety.
However, any repair or maintenance should be performed by the factory.
DISCONNECT DEVICE: A switch or circuit-breaker shall be included in the end-use
equipment or building installation. The switch shall be in close proximity to the
equipment and within easy reach of the operator. The switch shall be marked as the
disconnecting device for the equipment.
4–2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
4.2
ELECTRICAL CONNECTIONS
Electrical Connections
All wiring for the EPM 7100 is meter done through the front of the unit (lifting the cover with
the power to the unit OFF) so that the unit can be surface mounted. Connecting cables exit
the unit via two openings in the base plate.
DO NOT OVERTORQUE
SCREWS
Figure 4-1: Submeter Connections
Note
Do not over-torque screws.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
4–3
GROUND CONNECTIONS
4.3
CHAPTER 4: ELECTRICAL INSTALLATION
Ground Connections
The meter’s Ground Terminal (PE) should be connected directly to the installation’s
protective earth ground.
4.4
Voltage Fuses
GE Digital Energy recommends the use of fuses on each of the sense voltages and on the
control power, even though the wiring diagrams in this chapter do not show them.
• Use a 0.1 Amp fuse on each voltage input.
• Use a 3 Amp fuse on the power supply.
4.5
Electrical Connection Diagrams
Choose the diagram that best suits your application. Make sure the CT polarity is correct.
1.
Three Phase, Four-Wire System Wye with Direct Voltage, 3 Element
1a. Dual Phase Hookup
1b. Single Phase Hookup
2.
Three Phase, Four-Wire System Wye with Direct Voltage, 2.5 Element
3.
Three-Phase, Four-Wire Wye with PTs, 3 Element
4.
Three-Phase, Four-Wire Wye with PTs, 2.5 Element
5.
Three-Phase, Three-Wire Delta with Direct Voltage (No PTs, 2 CTs)
6.
Three-Phase, Three-Wire Delta with Direct Voltage (No PTs, 3 CTs)
7.
Three-Phase, Three-Wire Delta with 2 PTs, 2 CTs
8.
Three-Phase, Three-Wire Delta with 2 PTs, 3 CTs
9.
Current Only Measurement (Three Phase)
10. Current Only Measurement (Dual Phase)
11. Current Only Measurement (Single Phase)
4–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
1. Service: WYE, 4-Wire with No PTs, 3 CTs
N
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
Vref
L1
Vc
Vb
Va
3A
FUSE
FUSES
3 x 0.1A
N(-)
L(+)
Power
Supply
Connection
N
C B A
LOAD
Select: “3 EL WYE” (3 Element Wye) in Meter Programming setup.
C
A
B
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
4–5
ELECTRICAL CONNECTION DIAGRAMS
CHAPTER 4: ELECTRICAL INSTALLATION
1a. Dual Phase Hookup
N
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
Vref
L1
Vb
Va
3A
FUSE
FUSES
2x 0.1A
N(-)
L(+)
Power
Supply
Connection
N
4–6
C B A
LOAD
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
1b. Single Phase Hookup
N
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
Vref
L1
Vb
Va
3A
FUSE
FUSE
0.1A
N(-)
L(+)
Power
Supply
Connection
N
C B A
LOAD
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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ELECTRICAL CONNECTION DIAGRAMS
CHAPTER 4: ELECTRICAL INSTALLATION
2. Service: 2.5 Element WYE, 4-Wire with No PTs, 3 CTs
N
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
Vref
L1
Vc
Va
3A
FUSE
FUSES
2 x 0.1A
N(-)
L(+)
Power
Supply
Connection
N
C B A
LOAD
Select: “2.5 EL WYE” (2.5 Element Wye) in Meter Programming setup.
C
A
B
4–8
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
3. Service: WYE, 4-Wire with 3 PTs, 3 CTs
N
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
Vref
L1
Vc
Vb
Va
3A
FUSE
FUSES
3 x 0.1A
N(-)
L(+)
Power
Supply
Connection
Earth Ground
N
C B A
LOAD
Select: “3 EL WYE” (3 Element Wye) in Meter Programming setup.
C
A
B
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ELECTRICAL CONNECTION DIAGRAMS
CHAPTER 4: ELECTRICAL INSTALLATION
4. Service: 2.5 Element WYE, 4-Wire with 2 PTs, 3 CTs
N
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
Vref
L1
Vc
Va
3A
FUSE
FUSES
2 x 0.1A
N(-)
L(+)
Power
Supply
Connection
Earth Ground
N
C B A
LOAD
Select: “2.5 EL WYE” (2.5 Element Wye) in Meter Programming setup.
C
A
B
4–10
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
5. Service: Delta, 3-Wire with No PTs, 2 CTs
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
L1
Vc
Vb
Va
3A
FUSE
FUSES
3 x 0.1A
N(-)
L(+)
Power
Supply
Connection
C B A
LOAD
Select: “2 Ct dEL” (2 CT Delta) in Meter Programming setup.
C
C
B
A B
A
Not Connected to Meter
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4–11
ELECTRICAL CONNECTION DIAGRAMS
CHAPTER 4: ELECTRICAL INSTALLATION
6. Service: Delta, 3-Wire with No PTs, 3 CTs
LINE
C B A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
L1
Vc
Vb
Va
3A
FUSE
FUSES
3 x 0.1A
N(-)
L(+)
Power
Supply
Connection
C
B A
LOAD
Select: “2 Ct dEL” (2 CT Delta) in Meter Programming setup.
C
C
B
A B
A
Not Connected to Meter
4–12
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
7. Service: Delta, 3-Wire with 2 PTs, 2 CTs
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
L1
Vc
Vb
Va
3A
FUSE
FUSES
2 x 0.1A
N(-)
L(+)
Power
Supply
Connection
Earth Ground
C B A
LOAD
Select: “2 Ct dEL” (2 CT Delta) in Meter Programming setup.
C
C
B
A B
A
Not Connected to Meter
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
4–13
ELECTRICAL CONNECTION DIAGRAMS
CHAPTER 4: ELECTRICAL INSTALLATION
8. Service: Delta, 3-Wire with 2 PTs, 3 CTs
LINE
C B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
Vref
L1
L2
PE
L2
GND
L1
Vc
Vb
Va
3A
FUSE
FUSES
2 x 0.1A
N(-)
L(+)
Power
Supply
Connection
Earth Ground
C B A
LOAD
Select: “2 Ct dEL” (2 CT Delta) in Meter Programming setup.
C
C
B
A B
A
Not Connected to Meter
4–14
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
9. Service: Current Only Measurement (Three Phase)
LINE
N
C
B
A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
L2
PE
L2
GND
Vref
FUSE
3A
20VAC
Minimum
L1
L1
Va
FUSE
0.1A
Vref
N(-)
L(+)
Power
Supply
Connection
N
C B
LOAD
A
Select: “3 EL WYE” (3 Element Wye) in Meter Programming setup.
Note
NOTE
Even if the meter is used for only Amp readings, the unit requires a Volts AN reference.
Please make sure that the Voltage input is attached to the meter. AC Control Power can be
used to provide the reference signal.
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ELECTRICAL CONNECTION DIAGRAMS
CHAPTER 4: ELECTRICAL INSTALLATION
10. Service: Current Only Measurement (Dual Phase)
N
LINE
B A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
L2
PE
GND
L2
Vref
FUSE
3A
20VAC
Minimum
L1
L1
Va
FUSE
0.1A
Vref
N(-)
L(+)
Power
Supply
Connection
N
B A
LOAD
Select: “3 EL WYE” (3 Element Wye) in Meter Programming setup.
Note
NOTE
4–16
Even if the meter is used for only Amp readings, the unit requires a Volts AN reference.
Please make sure that the Voltage input is attached to the meter. AC Control Power can be
used to provide the reference signal.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 4: ELECTRICAL INSTALLATION
ELECTRICAL CONNECTION DIAGRAMS
11. Service: Current Only Measurement (Single Phase)
LINE
N A
Electronic Circuits
CT
Shorting
Block
Ia+ Ia-
Ib+ Ib-
Ic+
Ic-
CN2
Earth Ground
CN1
Va
Vb
Vc
L2
PE
GND
L2
Vref
FUSE
3A
20VAC
Minimum
L1
L1
Va
FUSE
0.1A
Vref
N(-)
L(+)
Power
Supply
Connection
N A
LOAD
Select: “3 EL WYE” (3 Element Wye) in Meter Programming setup.
Note
NOTE
Even if the meter is used for only Amp readings, the unit requires a Volts AN reference.
Please make sure that the Voltage input is attached to the meter. AC Control Power can be
used to provide the reference signal.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
4–17
ELECTRICAL CONNECTION DIAGRAMS
4–18
CHAPTER 4: ELECTRICAL INSTALLATION
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 5: Communication
Installation
Communication Installation
5.1
EPM 7100 Meter Communication
The EPM 7100 submeter provides two independent Communication ports plus KYZ pulse
output. (For information on Ethernet configuration, see Chapter 6.) The first port, Com 1, is
an IrDA Port, which uses Modbus ASCII. The second port, Com 2, provides RS485 or RJ45
Ethernet or Wi-Fi Ethernet Communication.
5.1.1
IrDA Port (Com 1)
The EPM 7100 submeter’s Com 1 IrDA port is located on the meter’s face. This port allows
the unit to be set up and programmed with any device capable of IrDA communication.
IrDA Port Settings are:
Address: 1
Baud Rate: 57.6k
Protocol: Modbus ASCII
Figure 5-1: Communication with IrDA Port
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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EPM 7100 METER COMMUNICATION
5.1.2
CHAPTER 5: COMMUNICATION INSTALLATION
RS485 Communication Com 2 (485 Option)
The EPM 7100 submeter’s RS485 port uses standard 2-Wire, Half Duplex architecture. The
RS485 connector is located on the front of the meter, under the cover. A connection can
easily be made to a Master device or to other Slave devices, as shown below.
Care should be taken to connect + to + and - to - connections.
Note
NOTE
Wireless Ethernet Connection
Electronic Circuits
JP2: Must be in
position 1-2 for
RS485
Ia Ia Ib Ib Ic Ic
(+) (-) (+) (-) (+) (-)
Va Vb Vc Vn L1 L2 PE
Z K Y + - SH
RS485
To Other
Devices
Pulse Contacts
The EPM 7100 submeter’s RS485 port can be programmed with the buttons on the Meter’s
face or by using GE Communicator software.
The standard RS485 port settings* are as follows:
Address: 001 to 247
Baud Rate: 9.6k, 19.2k, 38.4k or 57.6k
Protocol: Modbus RTU, Modbus ASCII, DNP 3.0
*
With Runtime Firmware Version 26 or higher, Baud Rate settings of 1200, 2400, and 4800
and Parity settings (Even, Odd, None) are also available.
Note
5–2
The position of Jumper 2 (JP2) must be set for either RS485 or Ethernet communication
(see figure on next page). You put the jumper on positions 2 and 3 for LAN (Ethernet)
communication, and on 1 and 2 for RS485 communication.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION INSTALLATION
EPM 7100 METER COMMUNICATION
JP2
LAN/
RS485
Setting
5.1.3
KYZ Output
•
The KYZ pulse output provides pulsing energy values that are used to verify the
submeter’s readings and accuracy.
•
The KYZ pulse output is located on meter’s face, under the cover, next to the RS485
connection.
See Section 2.2 for the KYZ output specifications; see Section 7.4 for pulse constants.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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EPM 7100 METER COMMUNICATION
CHAPTER 5: COMMUNICATION INSTALLATION
Wireless Ethernet Connection
Electronic Circuits
Ia Ia Ib Ib Ic Ic
(+) (-) (+) (-) (+) (-)
Va Vb Vc Vn L1 L2 PE
Z K Y + - SH
RS-485
To Other
Devices
Pulse Contacts
5.1.4
Ethernet Connection
In order to use the Ethernet capability of the EPM 7100 submeter, the Ethernet (Network)
module must be installed in your meter, and JP2 must be set to positions 2-3. You can use
either wired Ethernet, or Wi-Fi.
5–4
•
For wired Ethernet, use Standard RJ45 10/100Base T cable to connect to the EPM
7100 submeter. The RJ45 line is inserted into the RJ45 Port of the meter.
•
For Wi-Fi connections, make sure you have the correct antenna attached to the meter.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION INSTALLATION
METER COMMUNICATION AND PROGRAMMING OVERVIEW
Wireless Ethernet Connection
Ethernet Module
Electronic Circuits
JP2: Must be in
position 2-3 for
Ethernet (RJ45 or WiFi) **
Ia Ia Ib Ib Ic Ic
(+) (-) (+) (-) (+) (-)
Va Vb Vc Vn L1 L2 PE
Z K Y + - SH
RS-485
To Other
Devices
** See the JP2 figure and instructions on page 5-2.
Refer to Chapter 6 of this manual for instructions on how to configure the Network module.
5.2
Meter Communication and Programming Overview
You can connect to the meter using either the RS485 connection (as shown in Section 5.1.2)
or the RJ45/WiFi connection (as shown in Section 5.1.4). Once a connection is established,
GE Communicator software can be used to program the meter and communicate to other
devices.
Meter Connection (Physical Connection):
To provide power to the meter, use one of the wiring diagrams in Chapter 4 or attach a
Power cord to PE, L1 and L2.
The RS485 cable attaches to SH, B(-) and A(+) as shown in Section 5.1.2.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
5–5
METER COMMUNICATION AND PROGRAMMING OVERVIEW
5.2.1
CHAPTER 5: COMMUNICATION INSTALLATION
Connecting to the Meter
1.
Open GE Communicator software.
Click the Connect Icon
2.
Click the Connect button on the Icon bar.
3.
The Connect screen opens, showing the Initial settings.
Make sure your settings are the same as those shown here, except for the IP Address
field, which must be your device’s IP address. The address shown here is the default
Ethernet option address.
Note
NOTE
The settings you make will depend on whether you are connecting to the meter via Serial
Port or Network. Use the pull-down windows to make any necessary changes.
Figure 5-2: Serial Port settings
5–6
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION INSTALLATION
METER COMMUNICATION AND PROGRAMMING OVERVIEW
Figure 5-3: Network Port settings
4.
Click the Connect button on the screen. (You may have to disconnect power,
reconnect power and then click Connect.)
The Device Status screen opens, confirming the connection.
5.
Click OK to close the Device Status screen.
The GE Communicator Main screen reappears.
6.
Click the Profile button on the toolbar.
You will see the EPM 7100 meter’s Device Profile screen. Use the Tree menu on
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
5–7
METER COMMUNICATION AND PROGRAMMING OVERVIEW
CHAPTER 5: COMMUNICATION INSTALLATION
the left of the screen to navigate between settings screens (see below).
7.
5–8
Click the Communications tab. You will see the screen shown on the next page. Use
this screen to enter communication settings for the meter's two on-board ports: the
IrDA port (COM 1) and RS485 port (COM 2) Make any necessary changes to settings.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION INSTALLATION
METER COMMUNICATION AND PROGRAMMING OVERVIEW
Valid Communication Settings are as follows:
COM1: (IrDA)
Response Delay: (0-750 msec)
COM2: (RS485)
Address: (1-247)
Protocol: (Modbus RTU, Modbus ASCII or DNP)
Baud Rate: (1200 to 57600) Your meter must have Runtime Firmware Version 26 or
higher to set Baud rates of 1200, 2400, and 4800.
Response Delay: (0-750 msec)
Parity: (Odd, Even, or None) Your meter must have Runtime Firmware Version 26 or
higher to be able to set Parity.
DNP Options for Voltage, Current, and Power: These fields allow you to choose
Primary or Secondary Units for DNP, and to set custom scaling if you choose
Primary. See the GE Communicator Instruction Manual for more information.
8.
When changes are complete, click the Update Device button to send a new profile to
the meter.
9.
Click Exit to leave the Device Profile or click other menu items to change other aspects
of the Device Profile (see the following section for instructions).
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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METER COMMUNICATION AND PROGRAMMING OVERVIEW
5.2.2
CHAPTER 5: COMMUNICATION INSTALLATION
EPM 7100 Meter Device Profile Settings
Note
NOTE
This section contains instructions for setting some of the EPM 7100 meter’s parameters.
Refer to the GE Communicator Instruction Manual for detailed instructions on all of the
available settings. You can view the manual online by clicking Help > Contents from the GE
Communicator Main screen.
CT, PT Ratios and System Hookup
You have two options for entering the CT and PT settings. You can either enter CT/PT
Numerator, Denominator, and Multiplier manually (see instructions below), or you can enter
the Ratios for CT/PT Numerator and Denominator and click the Update CT/Update PT
buttons to let the software calculate the Numerator, Denominator, and Multiplier for you.
You can then empty the Ratio fields and click the Update Ratio buttons to confirm the
calculated settings: you will see the same ratios you initially entered.
Note
For manual entry:
CT Ratios
CT Numerator (Primary): 1 - 9999
CT Denominator (Secondary): 5 or 1 Amp
This field is display only.
Note
NOTE
Either CT Multiplier (Scaling): 1, 10 or 100
OR Ratio: the ratio to be applied, and click Update CT
5–10
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METER COMMUNICATION AND PROGRAMMING OVERVIEW
Current Full Scale: Display only.
PT Ratios
PT Numerator (Primary): 1 - 9999
PT Denominator (Secondary): 40 - 600
PT Multiplier (Scaling): 1, 10, 100, or 1000
Voltage Full Scale: Display only.
System Wiring
3 Element Wye; 2.5 Element Wye; 2 CT Delta
Example Settings:
For a CT of 2000/5A, set the following CT Ratios in the entry fields:
CT Numerator (Primary) 2000
CT Denominator (Secondary) 5
CT Multiplier 1
The Current Full Scale field will read 2000.
You can obtain the same Current Full Scale by entering a CT Numerator of 200 and
a CT Multiplier of 10.
Note
NOTE
For a system that has 14400V primary with a 120V secondary line to neutral (PT
Ratio of 120:1), set the following PT Ratios in the entry fields:
PT Numerator (Primary) 1440
PT Denominator (Secondary) 120
PT Multiplier 10
The Voltage Full Scale field will read 14.40k.
Use the box at the bottom of the screen to enter the minimum voltage threshold,
which is a percentage of the voltage full scale. Enter a percentage between 0 and
12.7 in the % entry field. The minimum primary voltage based on the percentage
you entered is displayed at the bottom of the screen.
Example CT Settings:
200/5 Amps: Set the Ct-n value for 200, Ct-Multiplier value for 1
800/5 Amps: Set the Ct-n value for 800, Ct-Multiplier value for 1
2,000/5 Amps: Set the Ct-n value for 2000, Ct-Multiplier value for 1
10,000/5 Amps: Set the Ct-n value for 1000, Ct-Multiplier value for 10
Example PT Settings:
277/277 Volts: Pt-n value is 277, Pt-d value is 277, Pt-Multiplier is 1
14,400/120 Volts: Pt-n value is 1440, Pt-d value is 120, Pt-Multiplier value is 10
138,000/69 Volts: Pt-n value is 1380, Pt-d value is 69, Pt-Multiplier value is 100
345,000/115 Volts: Pt-n value is 3450, Pt-d value is 115, Pt-Multiplier value is 100
345,000/69 Volts: Pt-n value is 345, Pt-d value is 69, Pt-Multiplier value is 1000
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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METER COMMUNICATION AND PROGRAMMING OVERVIEW
CHAPTER 5: COMMUNICATION INSTALLATION
Settings are the same for Wye and Delta configurations.
Note
NOTE
Display Configuration
The settings on this screen determine the display configuration of the meter’s
faceplate.
The screen fields and acceptable entries are as follows:
Phases Displayed: A; A and B; A, B, and C. This field determines which phases are
displayed on the faceplate. For example, if you select A and B, only those two
phases will be displayed on the faceplate.
Auto Scroll Display: Yes or No. This field enables/disables the scrolling of selected
readings on the faceplate. If enabled, the readings scroll every 5 seconds.
Enable on Face Plate of Display: Check the boxes of the Readings you want
displayed on the faceplate of the meter. You must select at least one reading.
Power Direction: View as Load or View as Generator
Flip Power Factor Sign: Yes or No
Current (I) Display Autoscale: On to apply scaling to the current display or Off (No
decimal places)
Display Voltage in Secondary: Yes or No
5–12
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METER COMMUNICATION AND PROGRAMMING OVERVIEW
Load Bar Custom Configuration: To enter scaling for the Load Bar, click the Load
Bar Custom Configuration checkbox. Fields display on the screen that allow you to
enter a Scaling factor for the display (as shown).
Enter the scaling factor you want in the Current Scale field. This field is multiplied
by the CT Multiplier (set in the CT, PT Ratios, and System Hookup screen) to arrive at
the Primary Full Scale. Make sure you set the CT multiplier correctly.
Enable Fixed Scale for Voltage Display: To enter a scaling factor for the Voltage
display, click the checkbox next to Enable Fixed Scale for Voltage Display. The
screen changes (as shown).
Select the scaling you want to use from the pull-down menu. The options are: 0,
100.0kV, 10.00kV, or 0kV.
Energy, Power Scaling, and Averaging
The screen fields and acceptable entries are as follows:
Energy Settings
Energy Digits: 5; 6; 7; 8
Energy Decimal Places: 0 - 6
Energy Scale: unit; kilo (K); Mega (M)
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METER COMMUNICATION AND PROGRAMMING OVERVIEW
CHAPTER 5: COMMUNICATION INSTALLATION
Example: a reading for Digits: 8; Decimals: 3; Scale: K would be formatted as
00123.456k
Power Settings
Power Scale: Auto; unit; kilo (K); Mega (M)
Apparent Power (VA) Calculation Method: Arithmetic Sum; Vector Sum
Demand Averaging
Type: Block or Rolling
Interval (Block demand) or Sub-Interval (Rolling demand) in minutes: 5; 15; 30;
60
Number of Subintervals: 1; 2; 3; 4
Interval Window: This field is display only. It is the product of the values entered in
the Sub-Interval and Number of Subintervals fields.
Note
NOTE
You will only see the Number of Subintervals and Interval Window fields if you select
Rolling Demand.
System Settings
From this screen you can do the following:
Enable or disable password for Reset (reset max/min Energy settings, Energy
accumulators, and the individual logs) and/or Configuration (Device profile): click
the radio button next to Yes or No.
5–14
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION INSTALLATION
METER COMMUNICATION AND PROGRAMMING OVERVIEW
If you enable a password for reset, you must also enable it for configuration.
Note
NOTE
The meter’s default is password disabled.
Note
NOTE
Note
NOTE
Enabling Password protection prevents unauthorized tampering with devices. When a
user attempts to make a change that is under Password protection,
GE Communicator opens a screen asking for the password. If the correct password is
not entered, the change does not take place.
You must set up a password before enabling Password protection. Click the Change
button next to Change Password if you have not already set up a password.
Note
Change the Password:
1.
Click the Change button. You will see the Enter the New Password screen, as
shown.
2.
Type in the new password (0 - 9999).
3.
Retype the password.
4.
Click Change.
The new password is saved and the meter restarts.
Note
NOTE
If Password protection has already been enabled for configuration and you attempt to
change the password, you will see the Enter Password screen after you click Change.
Enter the old password and click OK to proceed with the password change.
Change the Meter Identification: input a new meter label into the Meter Designation
field.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
5–15
METER COMMUNICATION AND PROGRAMMING OVERVIEW
CHAPTER 5: COMMUNICATION INSTALLATION
Limits
Limits are transition points used to divide acceptable and unacceptable measurements.
When a value goes above or below the limit an out-of-limit condition occurs. Once they are
configured, you can view the out-of-Limits (or Alarm) conditions in the Limits log or Limits
polling screen. You can also use Limits to trigger relays. See the GE Communicator
Instruction Manual for details.
The current settings for Limits are shown in the screen. You can set and configure up to
eight Limits for the EPM 7100.
To set up a Limit:
1.
Select a Limit by double-clicking the Assigned Channel field.
2.
You will see the screen shown.
Select a Group and an Item for the Limit.
3.
Click OK.
To configure a Limit:
Double-click on the field to set the following values:
Above and Below Setpoint: % of Full Scale (the point at which the reading goes out of
limit)
5–16
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 5: COMMUNICATION INSTALLATION
METER COMMUNICATION AND PROGRAMMING OVERVIEW
Examples:
100% of 120V Full Scale = 120V
90% of 120V Full Scale = 108V
Above and Below Return Hysteresis: the point at which the reading goes back within
limit (see figure)
Examples:
Above Setpoint = 110%; Below Setpoint = 90%
(Out of Limit above 132V);(Out of Limit below 108V)
Above Return Hysteresis = 105%; Below Return Hysteresis = 95%
(Stay out of Limit until below 126V)(Stay out of Limit until above 114V)
+ MEASURED VALUE
Above Limit
condition
Above Limit Trigger point
HYSTERESIS
Return point from Above Limit condition
Return point from Below Limit condition
HYSTERESIS
Below Limit Trigger point
Below Limit
condition
0
- MEASURED VALUE
TIME
(if applicable)
Primary Fields: These fields are display only. They show what the setpoint and return
hysteresis value are for each limit.
Note
NOTE
Note
NOTE
Note
If you are entering negative Limits, be aware that the negative value affects the way
the above and below Limits function, since negative numbers are processed as signed
values.
If the Above Return Hysteresis is greater than the Above Setpoint, the Above Limit is
Disabled; if the Below Return Hysteresis is less than the Below Setpoint, the Below
Limit is Disabled. You may want to use this feature to disable either Above or Below
Limit conditions for a reading.
When you finish making changes to the Device Profile, click Update Device to send
the new Profile settings to the meter.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
5–17
METER COMMUNICATION AND PROGRAMMING OVERVIEW
Note
NOTE
5–18
CHAPTER 5: COMMUNICATION INSTALLATION
Refer to the GE Communicator Instruction Manual for additional instructions on
configuring the EPM 7100 meter settings, including Time Setting, Transformer and
Line Loss Compensation, CT and PT Compensation, Secondary Voltage display,
Symmetrical Components, Voltage and Current Unbalance, and scaling Primary
readings for use with DNP.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 6: Ethernet Connection
Configuration
Ethernet Connection Configuration
6.1
Introduction
The EPM 7100 submeter offers an optional WiFi (Wireless) or RJ45 Ethernet connection.
This option allows the submeter to be set up for use in a LAN (Local Area Network), using
standard WiFi base stations. Configuration for these connections is easily accomplished
through your PC using Telnet connections. Then you can access the submeter to perform
meter functions directly through any computer on your LAN: the EPM 7100 meter does not
need to be directly connected (wired) to these computers for it to be accessed.
This chapter outlines the procedures for setting up the parameters for Ethernet
communication.
• Host PC setup Section 6.2.
• EPM 7100 submeter setup Section 6.3.
6.2
Setting up the Host PC to Communicate with EPM 7100 meter
•
Consult with the network administrator before performing these steps because some
of the functions may be restricted to Administrator privileges.
•
The Host PC could have multiple Ethernet Adapters (Network Cards) installed. Identify
and configure the one that will be used for accessing the EPM 7100 meter.
•
The PC’s Ethernet Adapter must be set up for point-to-point communication when
setting up for the EPM 7100 meter. The Factory Default IP parameters programmed in
the EPM 7100 meter are:
IP Address: 10.0.0.1
Subnet Mask: 255.255.255.0
See other parameters in Section 6.3.
•
The factory default Ethernet mode is WLAN (WiFi) disabled. This means the meter can
be accessed via the RJ45 jack and cable connection only!
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
6–1
SETTING UP THE HOST PC TO COMMUNICATE WITH EPM 7100 METER
Note
NOTE
6.2.1
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
If the settings are lost or unknown in the EPM 7100 meter, follow the procedure in Section
6.4 for restoring Factory Default parameters. Default settings are listed in Section 6.3.
Configuring the Host PC’s Ethernet Adapter Using Windows XP©
The following example shows the PC configuration settings that allow you to access the
EPM 7100 meter in default mode. Use the same procedure when the settings are different
than the default settings, but are also known by you.
1.
6–2
From the Start Menu, select Control Panel > Network Connections. Refer to the
window shown below.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
SETTING UP THE HOST PC TO COMMUNICATE WITH EPM 7100 METER
2.
Right click on the Local Area Network Connection that you will use to connect to the
EPM 7100 meter and select Properties from the drop-down menu.
Refer the window shown below.
3.
Select Internet Protocol [TCP/IP] and click the Properties button.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
6–3
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
4.
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
On the window shown, click the Use the Following IP Address radio button and enter
these parameters. The values shown below are the default connection IP Address and
Subnet Mask.
IP Address: 10.0.0.2
Subnet Mask: 255.255.255.0
5.
6.3
Click the OK button. You have completed the setup procedure.
Setting up the Ethernet Module in the EPM 7100 meter
Below are the Factory Default settings for the EPM 7100 meter’s Ethernet Module. These
are programmed into the meter before it is shipped out from the factory. Parameters
indicated in bold letters (1, 6) may need to be altered to satisfy the local Ethernet
configuration requirements. Other parameters (2, 3, 4) should not be altered.
Note
NOTE
Follow the procedure described in Section 6.4 if these Factory Default parameters need to
be restored in the meter.
1. Network/IP Settings:
Network Mode…………Wired Only
IP Address ...............….. 10.0.0.1
Default Gateway ............ --- not set --Netmask .................... …255.255.255.0
2. Serial & Mode Settings:
Protocol ................... Modbus/RTU,Slave(s) attached
Serial Interface ........... 57600,8,N,1,RS232,CH1
3. Modem/Configurable Pin Settings:
CP0..! Defaults (In) CP1..! GPIO (In)
CP2..! GPIO (In)
CP3..! GPIO (In)
CP4..! GPIO (In)
CP5..! GPIO (In)
CP6..! GPIO (In)
CP7..! GPIO (In)
CP8..! GPIO (In)
CP9..! GPIO (In)
CP10.! GPIO (In)
RTS Output ................. Fixed High/Active
4. Advanced Modbus Protocol settings:
Slave Addr/Unit Id Source .. Modbus/TCP header
Modbus Serial Broadcasts ... Disabled (Id=0 auto-mapped to 1)
MB/TCP Exception Codes ..... Yes (return 00AH and 00BH)
Char, Message Timeout ...... 00050msec, 05000msec
6. WLAN Settings:
WLAN................................... Disabled, network:LTRX_IBSS
Topology.............................. Infrastructure, Country: US
Security.................................none
TX Data rate.......................11 Mbps auto fallback
6–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
Power management......Disabled
Soft AP Roaming...............N/A
Ad-hoc merging.................Enabled
WLAN Max failed packets..0
7. Security Settings:
SNMP................................Enabled
SNMP Community Name...public
Telnet Setup.....................Enabled
TFTP Download................ Enabled
Port 77FEh....................... Enabled
Enhanced Password..........Disabled
D)efault settings, S)ave, Q)uit without save
Select Command or parameter set (1..7) to change:
6.3.1
•
The Ethernet Module in the EPM 7100 meter can be locally or remotely configured
using a Telnet connection over the network.
•
The configuration parameters can be changed at any time and are retained when the
meter is not powered up. After the configuration has been changed and saved, the
Ethernet module performs a Reset.
•
Only one person at a time should be logged into the network port used for setting up
the meter. This eliminates the possibility of several people trying to configure the
Ethernet interface simultaneously.
Configuring the Ethernet Module in the EPM 7100 Meter using Windows XP© on the
Host Computer
If your PC is running Windows 7, you need to enable Telnet before using it as follows:
Note
NOTE
1.
Open the Control Panel.
2.
Select Programs and Features.
3.
Select Turn Windows features on or off.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
6–5
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
4.
Check the box for Telnet Client.
5.
Click OK. The Telnet client is now available.
To establish a Telnet connection on port 9999, follow these steps:
1.
From the Windows Start menu, click Run and type 'cmd’.
2.
Click the OK button to bring up the Windows' Command Prompt window.
3.
In the Command Prompt window, type:
“telnet 10.0.0.1 9999” and press the Enter key.
Make sure there is a space between the IP address and 9999.
Note
NOTE
When the Telnet connection is established you will see a message similar to the example
shown below.
Modbus Bridge
Serial Number 5415404 MAC Address 00:20:4A:54:3C:2C
Software Version V01.2 (000719)
Press Enter to go into Setup Mode
4.
6–6
To proceed to Setup Mode press Enter again. You will see a screen similar to
the one shown on the next page.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
1) Network/IP Settings:
Network Mode…………Wired Only
IP Address ...............….. 10.0.0.1
Default Gateway ............ --- not set --Netmask .................... …255.255.255.0
2) Serial & Mode Settings:
Protocol ................... Modbus/RTU,Slave(s) attached
Serial Interface ........... 57600,8,N,1,RS232,CH1
3) Modem/Configurable Pin Settings:
CP0..! Defaults (In) CP1..! GPIO (In) CP2..! GPIO (In)
CP3..! GPIO (In) CP4..! GPIO (In) CP5..! GPIO (In)
CP6..! GPIO (In) CP7..! GPIO (In) CP8..! GPIO (In)
CP9..! GPIO (In) CP10.! GPIO (In)
RTS Output ................. Fixed High/Active
4) Advanced Modbus Protocol settings:
Slave Addr/Unit Id Source .. Modbus/TCP header
Modbus Serial Broadcasts ... Disabled (Id=0 auto-mapped to 1)
MB/TCP Exception Codes ..... Yes (return 00AH and 00BH)
Char, Message Timeout ...... 00050msec, 05000msec
6) WLAN Settings:
WLAN ....................... Disabled, network:LTRX_IBSS
Topology……………. AdHoc, Country: US, Channel: 11
Security……………… none
TX Data rate………… 11 Mbps auto fallback
Power management….. not supported in ad hoc mode
7. Security Settings:
SNMP................................Enabled
SNMP Community Name...public
Telnet Setup.....................Enabled
TFTP Download................ Enabled
Port 77FEh....................... Enabled
Enhanced Password..........Disabled
D)efault settings, S)ave, Q)uit without save
Select Command or parameter set (1..6) to change:
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
6–7
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
5.
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
Type the number for the group of parameters you need to modify. After the
group is selected, the individual parameters display for editing. Either:
• Enter a new parameter if a change is required
• Press Enter to proceed to the next parameter without changing the
current one.
Change Settings 1 and 6 ONLY! Settings 2, 3, and 4 must have the default values shown.
Note
6.
6.3.2
Continue setting up parameters as needed. After finishing your modifications,
make sure to press the “S” key on the keyboard. This will save the new values
and perform a Reset in the Ethernet Module.
Example of Modifying Parameters in Groups 1, 6, and 7
Follow the steps in 6.3.1 to enter Setup Mode.
• Network IP Settings Detail (1) (Set device with static IP Address.)
Network Mode: 0=Wired only, 1=Wireless Only <0> ? Key 1 and press Enter for WiFi
mode.
IP Address <010> 192.<000> 168.<000> .<000> .<001> You can change the IP
address in this setting.
Set Gateway IP Address <N> ? Y (If you want to change the Gateway address.)
Gateway IP Address : <192> .<168> .<000> .<001> (You can change the Gateway
address in this setting.)
Set Netmask <N for default> <Y> ? Y (If you want to change the Netmask.)
<255> .<255> .<255> .<000> (You can change the Netmask in this setting.)
Change telnet config password <N> ? N
• WLAN Settings Detail (6)
(The settings shown are recommended by GE Multilin for use with the EPM 7100
meter. You will only be able to access these settings if you have set Network
Mode to “1” (to select Wireless mode) in the Network IP Settings Detail, shown
previously.)
Topology: 0=Infrastructure, 1=Ad-Hoc <1> ? 0
Network name <SSID> <LTRX_IBSS> ? EPM_METERS
Security suite: 0=none, 1=WEP, 2=WPA, 3=WPA2/802.11i <0> ? Enter the number of
the encryption method are using, e.g., 3 for WPA2/802.11i.
• If you select “1” (WEP), you will see the following settings:
Authentication 0=open/none, 1=shared <0> ? (Enter 1 if you want the
encryption key matched with a communication partner before messages are
passed through.)
Encryption 1=WEP64, 2=WEP128 <1> 2
Change Key <N> Y
Display Key <N> N
Key Type 0=hex, 1=passphrase <0> 0
Enter Key:
You can manually enter 26 hexadecimal characters (required for 128-bit
6–8
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
encryption) or you can use a WEP Key provider online. WEP Key providers
should note on their website that their encryption algorithm is for the Wired
Equivalent Privacy portion of IEEE 802.11b/g.
WEP Key Provider Steps
1. Input 26 alphanumeric characters as your Passphrase.
Note
Remember your Passphrase.
PASSPHRASE TO HEXADECIMAL WEP KEYS
Enter the passphrase below.
1009egbck001036ab
Generate keys
2. Click the Generate Keys button. Your Hexadecimal WEP Keys display.
PASSPHRASE TO HEXADECIMAL WEP KEYS
The passphrase 1009egbcke001306ab produces the following keys:
64-BIT (40-BIT KEYS)
1. AA43FB768D
2. 637D8DB9CE
3. AFDE50AF61
4. 0c35E73E25
128-BIT (104-BIT) KEY
041D7773D8B2C1D97BE9531DC
3. Enter the 128-bit Key.
TX Key Index <1> ? 1 (The WEP key used for transmissions - must be a value
between 1 and 4.)
TX Data Rate: 0=fixed, 1=auto fallback <1> ? 1
TX Data rate: 0=1, 1=2, 2=5.5, 3=11, 4=18, 5=24, 6=36, 7=54 Mbps <7> ?
Enter data transmission rate, e.g., 7 for 54Mbps.
Minimum Tx Data rate: 0=1, 1=2, 2=5.5, 3=11, 4=18, 5=24, 6=36, 7=54 Mbps
<0> ? 0
Enable Power management <N> ? Y
Enable Soft AP Roaming <N> ? N
Max Failed Packets (6-64, 255=disable) <6>? 6
• If you select “2” (WPA), you will make the following settings:
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
6–9
SETTING UP THE ETHERNET MODULE IN THE EPM 7100 METER
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
Change Key <N> Y
Display Key <N> N
Key Type 0=hex, 1=passphrase <0> 1
Enter Key: (The maximum length of the passphrase is 63 characters.
GE Multilin recommends using a passphrase of 20 characters or more for
maximum security.)
Encryption: 0=TKIP, 1=TKIP+WEP <0> ? Set the type to the minimum required
security level. The “+” sign indicates that the group (broadcast) encryption
method is different from the pairwise (unicast) encryption (WEP and TKIP).
TX Data rate: 0=fixed, 1=auto fallback <1> ? 1
TX Data rate: 0=1, 1=2, 2=5.5, 3=11, 4=18, 5=24, 6=36, 7=54 Mbps <7> ?
Enter data transmission rate, e.g., 7 for 54Mbps.
Minimum Tx Data rate: 0=1, 1=2, 2=5.5, 3=11, 4=18, 5=24, 6=36, 7=54 Mbps
<0> ? 0
Enable Power management <N> ? Y
Enable Soft AP Roaming <N> ? N
Max Failed Packets (6-64, 255=disable) <6>? 6
• If you select “3” (WPA2/802.11i), you will make the following settings:
Change Key <N> Y
Display Key <N> N
Key Type 0=hex, 1=passphrase <0> 1
Enter Key: (The maximum length of the passphrase is 63 characters.
GE Multilin recommends using a passphrase of 20 characters or more for
maximum security.)
Encryption: 0=CCMP, 1=CCMP+TKIP, 2=CCMP+WEP, 3=TKIP, 4=TKIP+WEP <3> ?
(Set the type to the minimum required security level. The “+” sign indicates
that the group (broadcast) encryption method is different from the pairwise
(unicast) encryption. For example, for CCMP+TKIP, CCMP is the pairwise
encryption and TKIP is the group encryption. CCMP is the default for WPA2.)
TX Data rate: 0=fixed, 1=auto fallback <1> ? 1
TX Data rate: 0=1, 1=2, 2=5.5, 3=11, 4=18, 5=24, 6=36, 7=54 Mbps <7> ?
Enter data transmission rate, e.g., 7 for 54Mbps.
Minimum Tx Data rate: 0=1, 1=2, 2=5.5, 3=11, 4=18, 5=24, 6=36, 7=54 Mbps
<0> ? 0
Enable Power management <N> ? Y
Enable Soft AP Roaming <N> ? N
Max Failed Packets (6-64, 255=disable) <6>? 6
• Security Settings (7)
Disable SNMP <N> ? N
SNMP Community Name <public>: (You can enter an SNMP community name
here.)
Disable Telnet Setup <N> ? N (If you change this setting to Y, you will not be able to
6–10
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
NETWORK MODULE HARDWARE INITIALIZATION
use Telnet to re-configure the Network card once you save the settings, without
resetting the Network card, as shown in Section 6.4. However, you may want to
disable Telnet setup and Port 77FEh to prevent users from accessing the setup
from the network.)
Disable TFTP Firmware Update <N> ? N
Disable Port 77FEh <N> ? N (For security purposes, you may want to disable Telnet
setup and Port 77FEh to prevent users from accessing the setup from the network.)
Enable Enhanced Password <N> ? N
Exiting the screen
Note
DO NOT PRESS ‘D’ as it will overwrite all changes and will save the default values.
Press 'S' to Save the settings you've entered.
6.4
Network Module Hardware Initialization
If you don’t know your current Network Module settings, or if the settings are lost, you can
use this method to initialize the hardware with known settings you will be able to work
with.
Note
Use extreme care when following this procedure. Parts of the Main Board have HIGH
VOLTAGE that you must not touch. Only touch the Reset button, shorting blocks and
jumpers as described in the procedure.
Reset Button
JP3
JP2
1.
Place a shorting block on JP3 and press the Reset button on the main board.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
6–11
NETWORK MODULE HARDWARE INITIALIZATION
Note
NOTE
JP3 is located at the right hand side, upper corner of the main board. The shorting block
can be “borrowed” from JP2, located at the middle, right hand side. See the figure shown
on the previous page.
2.
6–12
CHAPTER 6: ETHERNET CONNECTION CONFIGURATION
After you press the Reset button, relocate the jumper back to JP2.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Chapter 7: Using the EPM 7100
Meter
Using the EPM 7100 Meter
7.1
Introduction
You can use the Elements and Buttons on the EPM 7100 meter’s face to view meter
readings, reset and/or configure the meter, and perform related functions. The following
sections explain the Elements and Buttons and detail their use. See Appendix A for
complete screen Navigation maps.
7.1.1
Understanding Meter Face Elements
The meter face features the following elements:
Reading Type
Indicator
IrDA Com
Port
MAX
ENTER
VOLTS L-N
VOLTS L-N
120.0
120.0
120.0
LM1
LM2
%THD
PRG
IrDA
120%-
% of Load
Bar
MENU
MIN
90%60%30%-
%LOAD
AMPS
A
W/VAR/PF
Parameter
Designator
VA/Hz
Wh
VARh
B
VAh
C
Wh Pulse
KILO
MEGA
Watt-hour
Test Pulse
Scaling
Factor
Figure 7-1: Figure 7.1: Meter Faceplate Showing Elements
•
Reading Type Indicator:
Indicates Type of Reading
•
Parameter Designator:
Indicates Reading Displayed
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
7–1
USING THE FRONT PANEL
7.1.2
CHAPTER 7: USING THE EPM 7100 METER
•
Watt-Hour Test Pulse:
Energy Pulse Output to Test Accuracy
•
Scaling Factor:
Kilo or Mega multiplier of Displayed Readings
•
% of Load Bar:
Graphic Display of Amps as % of the Load (Refer to Section 6.3 for additional
information.)
•
IrDA Communication Port:
Com 1 Port for Wireless Communication
Understanding Meter Face Buttons
Menu
MENU
MAX
ENTER
VOLTS L-N
120.0
120.0
120.0
LM2
%THD
PRG
IrDA
120%-
90%60%-
Down
Enter
VOLTS L-N
MIN
LM1
30%-
AMPS
A
W/VAR/PF
VA/Hz
Wh
VARh
B
VAh
C
Wh Pulse
KILO
%LOAD
MEGA
Right
Figure 7-2: Figure 7.2: Meter Faceplate Showing Buttons
The meter face has Menu, Enter, Down and Right buttons, which allow you to perform the
following functions:
7.2
•
View Meter Information
•
Enter Display Modes
•
Configure Parameters (may be Password Protected)
•
Perform Resets (may be Password Protected)
•
Perform LED Checks
•
Change Settings
•
View Parameter Values
•
Scroll Parameter Values
•
View Limit States
Using the Front Panel
You can access four modes using the EPM 7100 meter’s front panel buttons:
7–2
•
Operating Mode (Default)
•
Reset Mode
•
Configuration Mode
•
Information Mode.
Information Mode displays a sequence of screens that show model information, such
as Frequency, Amps, Software Option, etc.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 7: USING THE EPM 7100 METER
USING THE FRONT PANEL
Use the Menu, Enter, Down and Right buttons to navigate through each mode and its
related screens.
• Appendix A contains the complete Navigation Map for the front panel display
modes and their screens.
Note
NOTE
7.2.1
• The meter can also be configured using software; see the GE Communicator
Instruction Manual for instructions.
Understanding Startup and Default Displays
Upon Power Up, the meter displays a sequence of screens:
• Lamp Test Screen where all LEDs are lit
• Lamp Test Screen where all digits are lit
• Firmware Screen showing build number
• Error Screen (if an error exists).
After startup, if auto-scrolling is enabled, the EPM 7100 meter scrolls the parameter
readings on the right side of the front panel. The Kilo or Mega LED lights, showing the scale
for the Wh, VARh and VAh readings. Figure 7.3 shows an example of a Wh reading.
MAX
MENU
ENTER
VOLTS L-N
MIN
VOLTS L-N
LM1
AMPS
A
LM2
%THD
PRG
IrDA
120%-
90%60%30%-
%LOAD
0000
0.659
W/VAR/PF
VA/Hz
Wh
VARh
B
VAh
C
Wh Pulse
KILO
MEGA
Figure 7-3: Figure 7.3: Wh Reading
The EPM 7100 meter continues to provide scrolling readings until one of the buttons on the
front panel is pressed, causing the meter to enter one of the other Modes.
7.2.2
Using the Main Menu
1.
Press the Menu button. The Main Menu screen displays.
•
Reset Demand mode (rStd) is in the A window. Use the Down button to scroll, causing
the Reset Energy (rStE), Configuration (CFG), Operating (OPr), and Information (InFo)
modes to move to the A window.
•
The mode that is currently flashing in the A window is the "Active" mode - it is the
mode that can be configured.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
7–3
USING THE FRONT PANEL
CHAPTER 7: USING THE EPM 7100 METER
For example:
MENU
2.
7.2.3
ENTER
MENU
MENU
ENTER
ENTER
-
A
-
A
-
A
-
B
-
B
-
B
-
C
-
C
-
C
Press the Enter button from the Main Menu to view the Parameters (Settings) screen
for the currently active mode (mode shown in the A window).
Using Reset Mode
Reset mode has two options:
•
Reset Demand (rStd): resets the Max and Min values.
•
Reset Energy (rStE): resets the energy accumulator fields.
Press the Enter button while either rStd or rStE is in the A window.
Depending on your selection, either the Reset Demand No or Reset Energy No screen
displays.
MENU
ENTER
MENU
ENTER
-
A
-
A
-
B
-
B
-
C
-
C
•
If you press the Enter button again, the Main Menu displays, with the next mode in the
A window. (The Down button does not affect this screen.)
•
If you press the Right button, the Reset Demand YES or Reset Energy YES screen
appears.
MENU
ENTER
MENU
ENTER
-
A
-
A
-
B
-
B
-
C
-
C
Press Enter to perform a reset.
7–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 7: USING THE EPM 7100 METER
Note
NOTE
USING THE FRONT PANEL
If Password Protection is enabled for Reset, you must enter the four digit Password before
you can reset the meter. To enter a password, follow the instructions in Section 7.2.4.
Reset Demand YES resets all Max and Min values.
Note
Once you have performed a reset, the screen displays either "rSt dMd donE" or "rSt EnEr
donE" (depending on which Reset you performed) and then resumes auto-scrolling
parameters.
7.2.4
Entering a Password
If Password Protection has been enabled in the software for Reset and/or Configuration
(see the GE Communicator Instruction Manual for information), a screen appears
requesting a Password when you try to reset the meter and/or configure settings through
the front panel. PASS displays in the A window and 4 dashes appear in the B window. The
leftmost dash is flashing.
1.
Press the Down button to scroll numbers from 0 to 9 for the flashing dash. When the
correct number appears for that dash, use the Right button to move to the next dash.
Example: The left screen, below, shows four dashes. The right screen shows the display
after the first two digits of the password have been entered.
MENU
2.
MENU
ENTER
-
A
-
-
B
-
-
C
-
ENTER
PASS
12__
A
B
C
When all 4 digits of the password have been selected, press the Enter button.
• If you are in Reset mode and the correct Password has been entered, "rSt dMd
donE" or "rSt EnEr donE"displays and the screen resumes auto-scrolling
parameters.
• If you are in Configuration mode and the correct Password has been entered, the
display returns to the screen that required a password.
• If an incorrect Password has been entered, "PASS ---- FAIL" displays and:
• If you are in Reset mode, the previous screen is redisplayed.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
7–5
USING THE FRONT PANEL
CHAPTER 7: USING THE EPM 7100 METER
• If you are in Configuration mode, the previous Operating Mode screen is
redisplayed.
MENU
7.2.5
ENTER
-
A
-
B
-
C
Using Configuration Mode
Configuration mode follows Reset Energy in the Main Menu.
To access Configuration mode:
Note
NOTE
1.
Press the Menu button while the meter is auto-scrolling parameters.
2.
Press the Down button until the Configuration Mode option (CFG) is in the A
window.
3.
Press the Enter button. The Configuration Parameters screen displays.
4.
Press the Down button to scroll through the configuration parameters: Scroll
(SCrL), CT, PT, Connection (Cnct) and Port. The parameter currently 'Active," i.e.,
configurable, flashes in the A window.
5.
Press the Enter button to access the Setting screen for the currently active
parameter.
You can use the Enter button to scroll through all of the Configuration parameters and
their Setting screens, in order.
MENU
ENTER
MENU
ENTER
-
A
-
A
-
B
-
B
-
C
-
C
6.
The parameter screen displays, showing the current settings. To change the
settings:
• Use either the Down button or the Right button to select an option.
• To enter a number value, use the Down button to select the number value
for a digit and the Right button to move to the next digit.
7–6
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 7: USING THE EPM 7100 METER
Note
NOTE
USING THE FRONT PANEL
When you try to change the current setting and Password Protection is enabled for the
meter, the Password screen displays. See Section 7.2.4 for instructions on entering a
password.
7.
Once you have entered the new setting, press the Menu button twice.
8.
The Store ALL YES screen displays. You can either:
• Press the Enter button to save the new setting.
• Press the Right button to access the Store ALL no screen; then press the
Enter button to cancel the Save.
9.
MENU
If you have saved the settings, the Store ALL done screen displays and the
meter resets.
ENTER
MENU
ENTER
MENU
ENTER
-
A
-
A
-
A
-
B
-
B
-
B
-
C
-
C
-
C
Configuring the Scroll Feature
When in Auto Scroll mode, the meter performs a scrolling display, showing each
parameter for 7 seconds with a 1 second pause between parameters. The parameters
that the meter displays are selected through software. (Refer to the GE Communicator
Instruction Manual for instructions.)
To enable or disable Auto-scrolling:
1.
Press the Enter button when SCrl is in the A window.
The Scroll YES screen displays.
2.
Press either the Right or Down button if you want to access the Scroll no screen. To
return to the Scoll YES screen, press either button.
MENU
3.
MENU
ENTER
ENTER
-
A
-
A
-
B
-
B
-
C
-
C
Press the Enter button on either the Scroll YES screen (to enable auto-scrolling) or the
Scroll no screen (to disable auto-scrolling).
The CT- n screen appears (this is the next Configuration mode parameter).
• To exit the screen without changing scrolling options, press the Menu button.
Note
NOTE
• To return to the Main Menu screen, press the Menu button twice.
• To return to the scrolling (or non-scrolling) parameters display, press the Menu
button three times.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
7–7
USING THE FRONT PANEL
CHAPTER 7: USING THE EPM 7100 METER
Configuring CT Setting
The CT setting has three parts: Ct-n (numerator), Ct-d (denominator), and Ct-S (scaling).
The Ct-d screen is preset to a 5 Amp or 1 Amp value at the factory and cannot be changed.
Note
NOTE
1.
Press the Enter button when Ct is in the A window.
2.
The Ct-n screen displays. You can either:
• Change the value for the CT numerator.
• Access one of the other CT screens by pressing the Enter button:
- Press Enter once to access the Ct-d screen
- Press Enter twice to access the Ct-S screen.
To change the value for the CT numerator:
From the Ct-n screen:
• Use the Down button to select the number value for a digit.
• Use the Right button to move to the next digit.
To change the value for CT scaling:
From the Ct-S screen:
• Use the Right button or the Down button to choose the scaling you want.
The Ct-S setting can be 1, 10, or 100.
If you are prompted to enter a password, refer to Section 7.2.4 for instructions on doing so.
Note
NOTE
3.
After the new setting is entered, press the Menu button twice.
4.
The Store ALL YES screen displays. Press Enter to save the new CT setting.
Example CT Settings:
200/5 Amps: Set the Ct-n value for 200 and the Ct-S value for 1.
800/5 Amps: Set the Ct-n value for 800 and the Ct-S value for 1.
2,000/5 Amps: Set the Ct-n value for 2000 and the Ct-S value for 1.
10,000/5 Amps: Set the Ct-n value for 1000 and the Ct-S value for 10.
• The value for Amps is a product of the Ct-n value and the Ct-S value.
Note
• Ct-n and Ct-S are dictated by primary current; Ct-d is secondary current.
NOTE
MENU
7–8
ENTER
MENU
ENTER
MENU
ENTER
MENU
ENTER
-
A
-
A
-
A
-
A
-
B
-
B
-
B
-
B
-
C
-
C
-
C
-
C
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 7: USING THE EPM 7100 METER
USING THE FRONT PANEL
Configuring PT Setting
The PT setting has three parts: Pt-n (numerator), Pt-d (denominator), and Pt-S (scaling).
1.
Press the Enter button when Pt is in the A window.
2.
The PT-n screen displays. You can either:
• Change the value for the PT numerator.
• Access one of the other PT screens by pressing the Enter button:
- Press Enter once to access the Pt-d screen
- Press Enter twice to access the Pt-S screen.
To change the value for the PT numerator or denominator:
From the Pt-n or Pt-d screen:
• Use the Down button to select the number value for a digit.
• Use the Right button to move to the next digit.
To change the value for the PT scaling:
From the Pt-S screen:
• Use the Right button or the Down button to choose the scaling you want.
The Pt-S setting can be 1, 10, 100, or 1000.
If you are prompted to enter a password, refer to Section 7.2.4 for instructions on doing so.
Note
NOTE
3.
After the new setting is entered, press the Menu button twice.
4.
The STOR ALL YES screen displays. Press Enter to save the new PT setting.
Example Settings:
277/277 Volts: Pt-n value is 277, Pt-d value is 277, Pt-S value is 1.
14,400/120 Volts: Pt-n value is 1440, Pt-d value is 120, Pt-S value is 10.
138,000/69 Volts: Pt-n value is 1380, Pt-d value is 69, Pt-S value is 100.
345,000/115 Volts: Pt-n value is 3450, Pt-d value is 115, Pt-S value is 100.
345,000/69 Volts: Pt-n value is 345, Pt-d value is 69, Pt-S value is 1000.
Pt-n and Pt-S are dictated by primary voltage; Pt-d is secondary voltage.
Note
NOTE
MENU
ENTER
MENU
ENTER
MENU
ENTER
-
A
-
A
-
A
-
B
-
B
-
B
-
C
-
C
-
C
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
7–9
USING THE FRONT PANEL
CHAPTER 7: USING THE EPM 7100 METER
Configuring Connection Setting
1.
Press the Enter button when Cnct is in the A window. The Cnct screen displays.
MENU
2.
ENTER
-
A
-
B
-
C
Press the Right button or Down button to select a configuration.
The choices are:
• 3 Element Wye (3 EL WYE)
• 2.5 Element Wye (2.5EL WYE)
• 2 CT Delta (2 Ct dEL)
If you are prompted to enter a password, refer to Section 7.2.4 for instructions on doing so.
Note
NOTE
3.
When you have made your selection, press the Menu button twice.
4.
The STOR ALL YES screen displays. Press Enter to save the setting.
Configuring Communication Port Setting
Port configuration consists of : Address (a three digit number), Baud Rate (9600; 19200;
38400; or 57600), and Protocol (DNP 3.0; Modbus RTU; or Modbus ASCII).
1.
Press the Enter button when POrt is in the A window.
2.
The Adr (address) screen displays. You can either:
• Enter the address.
• Access one of the other Port screens by pressing the Enter button:
- Press Enter once to access the bAUd screen (Baud Rate).
- Press Enter twice to access the Prot screen (Protocol).
To enter Address:
From the Adr screen:
• Use the Down button to select the number value for a digit.
• Use the Right button to move to the next digit.
To select Baud Rate:
From the bAUd screen:
• Use the Right button or the Down button to select the setting you want.
To select Protocol:
From the Prot screen:
• Press the Right button or the Down button to select the setting you want.
7–10
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 7: USING THE EPM 7100 METER
USING THE FRONT PANEL
If you are prompted to enter a password, refer to Section 7.2.4 for instructions on doing so.
Note
NOTE
3.
When you have finished making your selections, press the Menu button twice.
4.
The STOR ALL YES screen displays. Press Enter to save the settings.
MENU
7.2.6
MENU
ENTER
MENU
ENTER
ENTER
-
A
-
A
-
A
-
B
-
B
-
B
-
C
-
C
-
C
Using Operating Mode
Operating mode is the EPM 7100 meter's default mode, that is, its standard front panel
display. After Startup, the meter automatically scrolls through the parameter screens, if
scrolling is enabled. Each parameter is shown for 7 seconds, with a 1 second pause
between parameters. Scrolling is suspended for 3 minutes after any button is pressed.
Note
NOTE
1.
Press the Down button to scroll all the parameters in Operating mode. The currently
"Active," i.e., displayed, parameter has the Indicator light next to it, on the right face of
the meter.
2.
Press the Right button to view additional readings for that parameter. The table on the
next page shows possible readings for Operating Mode. Sheet 2 in Appendix A shows
the Operating Mode Navigation Map.
Readings or groups of readings are skipped if they are not applicable to the meter type or
hookup, or if they are disabled in the programmable settings.
Table 7–1: Operating Mode Parameter Readings: Possible Readings
VOLTS L-N
VOLTS_LN
VOLTS_LN_MAX
VOLTS_LN_MIN
VOLTS L-L
VOLTS_LL
VOLTS_LL_MAX
VOLTS_LL_MIN
AMPS
AMPS
AMPS_NEUTRAL
AMPS_MAX
W/VAR/PF
W_VAR_PF
W_VAR_PF_MAX_POS W_VAR_PF_MIN_POS
VA/Hz
VA_FREQ
VA_FREQ_MAX
VA_FREQ_MIN
Wh
KWH_REC
KWH_DEL
KWH_NET
KWH_TOT
VARh
KVARH_POS
KVARH_NEG
KVARH_NET
KVARH_TOT
VAh
KVAH
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
VOLTS_LN_THD
AMPS_MIN
AMPS_THD
W_VAR_PF_MIN_NEG
7–11
UNDERSTANDING THE % OF LOAD BAR
7.3
CHAPTER 7: USING THE EPM 7100 METER
Understanding the % of Load Bar
The 10-segment LED bar graph at the bottom left of the EPM 7100 meter’s front panel
provides a graphic representation of Amps. The segments light according to the load, as
shown in the % Load Segment Table on the next page.
When the Load is over 120% of Full Load, all segments flash “On” (1.5 secs) and “Off” (0.5
secs).
Table 7–2: % of Load Segment Table
Segments
Load ≥ % Full Load
none
no load
1
1%
1-2
15%
1-3
30%
1-4
45%
1-5
60%
1-6
72%
1-7
84%
1-8
96%
1-9
108%
1-10
120%
All Blink
>120%
MAX
MENU
ENTER
VOLTS L-N
MIN
VOLTS L-N
120.0
120.0
120.0
LM1
LM2
%THD
PRG
10
IrDA
120%-
90%60%-
1
30%-
%LOAD
7–12
AMPS
A
W/VAR/PF
VA/Hz
Wh
VARh
B
VAh
C
Wh Pulse
KILO
MEGA
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
CHAPTER 7: USING THE EPM 7100 METER
7.4
WATT-HOUR ACCURACY TESTING (VERIFICATION)
Watt-Hour Accuracy Testing (Verification)
The EPM 7100 meter has a Watt-Hour Test Pulse on its face. This is an infrared pulse that
can be read easily to test for accuracy.
To be certified for revenue metering, power providers and utility companies have to verify
that this billing energy submeter will perform to the stated accuracy. To confirm the
submeter’s performance and calibration, power providers use field test standards to
insure that the unit’s energy measurements are correct. Since the EPM 7100 unit is a
traceable revenue submeter, it contains a utility grade test pulse that can be used to
gauge an accuracy standard. This is an essential feature required of all billing grade
meters and submeters.
•
Refer to Figure 7.5 for an illustration of how this process works.
•
Refer to table 7.4 for the Wh/Pulse constants for accuracy testing.
MAX
MENU
ENTER
VOLTS L-N
MIN
VOLTS L-N
LM1
AMPS
A
LM2
%THD
PRG
IrDA
120%-
90%60%30%-
0000
0.659
W/VAR/PF
VA/Hz
Wh
VARh
B
VAh
Watt-hour
Test Pulse
C
Wh Pulse
KILO
MEGA
%LOAD
Figure 7-4: Figure 7.3: Using the Watt-Hour Test Pulse
Table 7–3:
MENU
MAX
ENTER
VOLTS L-N
MIN
LM1
LM2
VOLTS L-L
-
A
-
B
-
C
AMPS
WNARP
%THD
VA/Hz
PRG
Wh
lrDA
VARh
VAh
Test Pulses
120%90%60%-
Energy Pulses
Wh Pulse
30%-
KILO
Energy
Standard
MEGA
%LOAD
Comparator
Error
Results
Figure 7-5: Using the Watt-hour Test Pulse
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
7–13
WATT-HOUR ACCURACY TESTING (VERIFICATION)
Input Voltage Level
CHAPTER 7: USING THE EPM 7100 METER
Class 10 Models
Class 2 Models
Below 150V
0.500017776
0.1000035555
Above 150V
2.000071103
0.400014221
Table 7–4: Infrared & KYZ Pulse Constants for Accuracy Testing - Kh Watt-hour per
pulse
Minimum pulse width is 90 milliseconds.
Note
NOTE
7–14
Refer to Chapter 2, Section 2.2, for Wh Pulse specifications.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Appendix A: Navigation Maps for
the EPM 7100 Meter
Navigation Maps for the EPM 7100 Meter
A.1
Introduction
You can configure the EPM 7100 meter and perform related tasks using the buttons on the
meter face.
• Chapter 8 contains a description of the buttons on the meter face and instructions
for programming the meter using them.
• The meter can also be programmed using software (see the GE Communicator
Instruction Manual).
A.2
Navigation Maps
The EPM 7100 meter Navigation maps begin on the next page. The maps show in detail
how to move from one screen to another and from one Display mode to another using the
buttons on the face of the meter. All Display modes will automatically return to Operating
mode after 10 minutes with no user activity.
EPM 7100 Meter Navigation Map Titles:
• Navigation Overview: Main Menu Screens (Sheet 1) on page A–2
• Operating Mode Screens (Sheet 2) on page A–3
• Reset Mode Screens (Sheet 3) on page A–4
• Configuration Mode Screens (Sheet 4) on page A–5
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
A–1
NAVIGATION MAPS
A.2.1
APPENDIX A: NAVIGATION MAPS FOR THE EPM 7100 METER
Navigation Overview: Main Menu Screens (Sheet 1)
STARTUP
sequence run once at meter startup:
2 lamp test screens, hardware information
screen, firmware version screen,
(conditional) error screens
10 minutes with no user activity
sequence completed
MENU
MAIN MENU:
OPR (blinking)
RSTD
RSTE
OPERATING MODE
ENTER
DOWN
RESET DEMAND MODE
ENTER
DOWN
DOWN
10 minutes
with no
user activity
MENU
MAIN MENU:
RSTD (blinking)
RSTE
CFG
sequence
completed
grid of meter data screens.
See pages A-3
sequence of screens to get password, if
required, and reset max/min data.
See page A-4
MENU
MAIN MENU:
RSTE (blinking)
CFG
INFO
RESET ENERGY MODE
ENTER
DOWN
sequence of screens to get password, if
required, and reset energy accumulators.
See page A-4
MENU
MAIN MENU:
CFG (blinking)
INFO
OPR
CONFIGURATION MODE
ENTER
DOWN
grid of meter settings screens with
password-protected edit capability.
See page A-5
Configuration Mode is not
available during a
Programmable Settings
update via a COM port.
MENU
MAIN MENU:
INFO (blinking)
OPR
RSTD
INFORMATION
ENTER
sequence of screens to show model
information, same as STARTUP except
lamp tests omitted.
MAIN MENU Screen
MAIN MENU screen scrolls through 4 choices,
showing 3 at a time. The top choice is always the
"active" one, which is indicated by blinking the legend.
SYMBOLS
BUTTONS
MENU
Returns to previous menu from any screen in any mode
ENTER
Indicates acceptance of the current screen and advances to the
next one
DOWN, RIGHT
Navigation:
Navigation and edit buttons
No digits or legends are blinking. On a menu, down advances
to the next menu selection, right does nothing. In a grid of
screens, down advances to the next row, right advances to the
next column. Rows, columns, and menus all navigate circularly.
A digit or legend is blinking to indicate that it is eligible for
change. When a digit is blinking, down increases the digit
value, right moves to the next digit. When a legend is blinking,
either button advances to the next choice legend.
single screen
all screens
for a display
mode
group of
screens
Editing:
action taken
button
A–2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX A: NAVIGATION MAPS FOR THE EPM 7100 METER
A.2.2
NAVIGATION MAPS
Operating Mode Screens (Sheet 2)
See Notes 1 & 3
RIGHT
VOLTS_LN
RIGHT
VOLTS_LN_MAX
RIGHT
VOLTS_LN_MIN
DOWN2
DOWN2
(from any VOLTS_LN
screen)
See Note 1
RIGHT
VOLTS_LL
RIGHT
VOLTS_LL_MAX
RIGHT
VOLTS_LL_MIN
DOWN2
(from any VOLTS_LL screen)
RIGHT
AMPS
RIGHT
IN
RIGHT
See Note 1
AMPS_MAX
RIGHT
AMPS_MIN
DOWN2
DOWN2
(from any AMPS screen)
See Note 1
RIGHT
W_VAR_PF
DOWN2
RIGHT
W_VAR_PF
_MAX_POS
RIGHT
W_VAR_PF
_MIN_POS
RIGHT
W_VAR_PF
_MAX_NEG
RIGHT
W_VAR_PF
_MIN_NEG
DOWN2
(from any W_VAR_PF screen)
See Note 1
RIGHT
VA_FREQ
RIGHT
VA_FREQ_MAX
RIGHT
VA_FREQ_MIN
DOWN2
(from any VA_FREQ screen)
See Note 1
RIGHT
KWH_REC
RIGHT
KWH_DEL
RIGHT
KWH_NET
RIGHT
KWH_TOT
DOWN2
(from any KWH screen)
See Note 1
RIGHT
KVARH_POS
RIGHT
KVARH_NEG
RIGHT
KVARH_NET
RIGHT
KVARH_TOT
DOWN2
(from any KVARH screen)
See Note 1
KVAH
MENU
(from any
operating mode
screen)
Notes
1 Group is skipped if not applicable to the meter type or hookup or if explicitly disabled via
programmable settings.
2 DOWN occurs without user intervention every 7 seconds if scrolling is enabled.
3 No Volts LN screens for Delta 2CT hookup.
4 Scrolling is suspended for 3 minutes after any button press.
to Main Menu
see page A-2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
A–3
NAVIGATION MAPS
A.2.3
APPENDIX A: NAVIGATION MAPS FOR THE EPM 7100 METER
Reset Mode Screens (Sheet 3)
from MAIN MENU
from MAIN MENU
(RSTD selected)
(RSTE selected)
RESET_ENERGY_NO:
RST
ENER
no (blinking)
ENTER
RESET_MM_NO:
RST
DMD
no (blinking)
RIGHT
RIGHT
RIGHT
RESET_ENERGY_YES:
RST
ENER
yes (blinking)
RIGHT
RESET_MM_YES:
RST
DMD
yes (blinking)
ENTER
ENTER
is password required?
is password required?
yes
yes
increment
blinking digit
DOWN
energy
no
RESET_ENTER_PW:
PASS
#### (one # blinking)
make next digit
blink
RIGHT
demand
no
ENTER
is password
correct?
ENTER
yes
reset all max &
min values
reset all max &
min values
energy
which reset?
demand
which reset?
RESET_MM_CONFIRM:
RST
DMD
DONE
no
2 sec
RESET_PW_FAIL:
PASS
####
FAIL
RESET_ENERGY_CONFIRM:
RST
ENER
DONE
2 sec.
2 sec.
to previous operating
mode screen
see page A-3
to previous operating
mode screen
see page A--3 or
this page, above
MENU
(from any
reset mode
screen)
to Main Menu
see page A-2
A–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX A: NAVIGATION MAPS FOR THE EPM 7100 METER
A.2.4
NAVIGATION MAPS
Configuration Mode Screens (Sheet 4)
See Note 1
CONFIG_MENU:
SCRL (blinking)
CT
PT
ENTER
DOWN
DOWN or
RIGHT3
toggle
scroll
setting
ENTER
MENU
ENTER
CONFIG_MENU:
CT (blinking)
PT
CNCT
DOWN
SCROLL_EDIT:
SCRL
yes or no
(choice blinking if edit)
ENTER
ENTER
CTN_EDIT:
DOWN
increment
blinking
digit
MENU
CONFIG_MENU:
PT (blinking)
CNCT
PORT
CT-N
####
(one # blinking if edit)
CTD_SHOW:
CT-D
1 or 5
RIGHT
blink
next
digit
ENTER
DOWN
increment
blinking
digit
MENU
ENTER
PTD_EDIT:
PT-N
####
(one # blinking if edit)
RIGHT
blink
next
digit
DOWN
increment
blinking
digit
PT-D
####
(one # blinking if edit)
RIGHT
blink
next
digit
PT_MULT_EDIT:
PT-S
1 or 10 or 100 or 1000
(choice blinking if edit)
DOWN
MENU
CONFIG_MENU:
CNCT (blinking)
PORT
PASS2
DOWN
DOWN
CONNECT_EDIT:
CNCT
1 of 3 choices
(choice blinking if edit)
ENTER
MENU
2
CONFIG_MENU:
PASS2 (blinking)
SCRL
CT
DOWN
increment
blinking
digit
ADDRESS_EDIT:
ADR
###
(one # blinking if edit)
DOWN
increment
blinking
digit
yes
MENU
MENU
PASSWORD_EDIT:
PASS
#### (one # blinking)
SAVE_YES:
STOR
ALL?
yes (blinking)
RIGHT RIGHT
SAVE_NO:
STOR
ALL?
no (blinking)
DOWN or
RIGHT
show
next
choice
PROT choices:
MOD RTU,
MOD ASCI,
DNP
PROTOCOL_EDIT:
PROT
1 of 3 choices
(choice blinking if edit)
DOWN or
RIGHT
show
next
choice
ENTER2
RIGHT
blink
next
digit
Notes:
1. Initial access is view-only. View access shows the existing settings. At the
first attempt to change a setting (DOWN or RIGHT pressed), password is
requested (if enabled) and access changes to edit. Edit access blinks the digit
or list choice eligible for change and lights the PRG LED.
2. Skip over password edit screen and menu selection if access is view-only
or if password is disabled.
3. Scroll setting may be changed with view or edit access.
4. ENTER accepts an edit; MENU abandons it.
first DOWN or RIGHT in view
access (if password required)
save new
configuration
ENTER
DOWN
CFG_ENTER_PW:
PASS
### (one # blinking)
increment
blinking
digit
reboot
ENTER
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
See Note 1
RIGHT
yes
blink
next
digit
ENTER
SAVE_CONFIRM:
STOR
ALL
DONE
2 sec.
see page A-2
BAUD_EDIT:
BAUD
##.#
(choice blinking if edit)
RIGHT
blink
next
digit
MENU
(per row of the originating screen)
MENU
to Main Menu
ENTER
ENTER
CONFIG_MENU screen
scrolls through 6 choices,
showing 3 at a time. The
top choice is always the
"active" one, indicated by
blinking the legend.
no
ENTER
ENTER
2
any changes?
CNCT choices:
3 EL WYE,
2 CT DEL,
2.5EL WYE
DOWN or
RIGHT
show
next
choice
MENU
CONFIG_MENU:
PORT (blinking)
PASS2
SCRL
DOWN or
RIGHT
show
next
choice
ENTER
ENTER
ENTER
DOWN or
RIGHT
show
next
choice
ENTER
ENTER
PTN_EDIT:
DOWN
CT_MULT_EDIT:
CT-S
1 or 10 or 100
(choice blinking if edit)
is password
correct?
no
to the originating
EDIT screen
to previous operating
mode screen
see page A-3 or A-4
A–5
NAVIGATION MAPS
A–6
APPENDIX A: NAVIGATION MAPS FOR THE EPM 7100 METER
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Appendix B: Modbus Mapping &
Log Retrieval for the
EPM 7100 Meter
Modbus Mapping & Log Retrieval for the EPM 7100 Meter
B.1
Introduction
The Modbus Map for the EPM 7100 submeter gives details and information about the
possible readings of the meter and its programming. The meter can be programmed using
the faceplate buttons (Chapter 7), or by using software. For a programming overview, see
Section 5.2 ; for detailed programming instructions see the GE Communicator Instruction
Manual.
B.2
Modbus Register Map Sections
The EPM 7100 meter’s Modbus Register Map includes the following sections:
Fixed Data Section, Registers 1- 47, details the Meter’s Fixed Information.
Meter Data Section, Registers 1000 - 12031, details the Meter’s Readings, including
Primary Readings, Energy Block, Demand Block, Phase Angle Block, Status Block, Minimum
and Maximum in Regular and Time Stamp Blocks, and Accumulators. Operating Mode
readings are described in Section 8.2.6.
Commands Section, Registers 20000 - 26011, details the Meter’s Resets Block,
Programming Block, Other Commands Block and Encryption Block.
Programmable Settings Section, Registers 30000 - 33575, details all the setups you can
program to configure your meter.
Secondary Readings Section, Registers 40001 - 40100, details the Meter’s Secondary
Readings.
Log Retrieval Section, Registers 49997 - 51095, details Log Retrieval. See Section B.5 for
instructions on retrieving logs.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–1
DATA FORMATS
B.3
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Data Formats
ASCII: ASCII characters packed 2 per register in high, low order and without any
termination characters.
SINT16/UINT16: 16-bit signed/unsigned integer.
SINT32/UINT32: 32-bit signed/unsigned integer spanning 2 registers. The lower-addressed
register is the high order half.
FLOAT: 32-bit IEEE floating point number spanning 2 registers. The lower-addressed
register is the high order half (i.e., contains the exponent).
B.4
Floating Point Values
Floating Point Values are represented in the following format:
Register
0
Byte
1
0
1
4
3
2
1
0
7
6
5
6
5
4
3
2
1
0
7
6
Meaning
s
e
e
e
e
e
e
e
e
m m m m m m m m m m m m m m m m m m m m m m m
exponent
4
1
7
sign
5
0
Bit
3
2
1
0
7
6
5
4
3
2
1
0
mantissa
The formula to interpret a Floating Point Value is:
-1sign x 2exponent-127 x 1.mantissa = 0x0C4E11DB9
-1sign x 2137-127 x 1.11000010001110111001
-1 x 210 x 1.75871956
-1800.929
Register
0x0C4E1
Byte
Bit
Meaning
0x01DB9
0x0C4
0x0E1
0x01D
0x0B9
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
1
1
0
0
0
1
0
0
1
1
1
0
0
0
0
1
0
0
0
1
1
1
0
1
1
0
1
1
1
0
0
1
s
e
e
e
e
e
e
e
e
m m m m m m m m m m m m m m m m m m m m m m m
sign
exponent
mantissa
1
0x089 = 137
0b11000010001110110111001
Formula Explanation
C4E11DB9 (hex)
11000100 11100001 00011101 10111001 (binary)
The sign of the Mantissa (and therefore the number) is 1, which represents a negative
value.
The Exponent is 10001001 (binary) or 137 decimal.
The Exponent is a value in excess of 127, so the Exponent value is 10.
The Mantissa is 11000010001110110111001 binary.
With the implied leading 1, the Mantissa is (1).C23B72 (hex).
B–2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
RETRIEVING LOGS USING THE MODBUS MAP
The Floating Point Representation is therefore -1.75871956 x 210
Decimal equivalent: -1800.929
Exponent = the whole number before the decimal point
Note
Mantissa = the positive fraction after the decimal point
NOTE
B.5
Retrieving Logs Using the Modbus Map
This section describes the log interface system of the EPM 7100 meter from a
programming point of view. It is intended for programmers implementing independent
drivers for log retrieval from the meter.
It describes the meaning of the meter’s Modbus registers related to log retrieval and
conversion, and details the procedure for retrieving a log’s records.
• All references assume the use of Modbus function codes 0x03, 0x06, and 0x10,
where each register is a 2 byte MSB (Most Significant Byte) word, except where
otherwise noted.
Note
NOTE
• The caret symbol (^) notation is used to indicate mathematical “power.” For
example, 2^8 means 28; which is 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2, which equals 256.
B.5.1
Data Formats
Timestamp: Stores a date from 2000 to 2099. Timestamp has a Minimum resolution of 1
second.
Byte
0
1
2
Month
Day
3
Hour
4
5
Minute
Second
Value
Year
Range
0-99 (+2000)
1-12
1-31
0-23
0-59
0-59
Mask
0x7F
0x0F
0x1F
0x1F
0x3F
0x3F
The high bits of each timestamp byte are used as flags to record meter state information
at the time of the timestamp. These bits should be masked out, unless needed.
B.5.2
EPM 7100 Meter Logs
The EPM 7100 meter has 4 logs: System Event and 3 Historical logs. Each log is described
below.
1.
System Event ( 0 ) : The System Event log is used to store events which happen in, and
to, the meter. Events include Startup, Reset Commands, Log Retrievals, etc.
The System Event Log Record takes 20 bytes, 14 bytes of which are available when the log
is retrieved
.
Byte
Value
0
1
2
3
Timestamp
4
5
6
7
Group
Event
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
8
Mod
9
Chan
10
Param1
11
Param2
12
Param3
13
Param4
B–3
RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
The complete Systems Events table is shown in Section B.5.5, step 1, on page B-19.
Note
NOTE
2.
Alarm Log (1): The Alarm Log records the states of the 8 Limits programmed in the
meter.
• Whenever a limit goes out (above or below), a record is stored with the value that
caused the limit to go out.
• Whenever a limit returns within limit, a record is stored with the "most out of limit"
value for that limit while it was out of limit.
The Alarm Log Record uses 16 bytes, 10 bytes of which are available when the log is
retrieved.
Byte
0
1
Value
2
3
4
5
6
Timestamp
7
Direction
8
Limit#
9
Value %
The limit # byte is broken into a type and an ID.
3.
Byte
0
Value
Type
1
0
2
0
3
0
4
5
0
6
7
Limit ID
Historical Log 1 ( 2 ) : The Historical Log records the values of its assigned registers at
the programmed interval.
See Section B.5.3, Number 1, for details on programming and interpreting the log
Note
NOTE
.
Byte
Value
B.5.3
0
1
2
3
4
5
Timestamp
4.
Historical Log 2 ( 3 ) : Same as Historical Log 1.
5.
Historical Log 3 ( 4 ) : Same as Historical Log 1.
6
.
.
N
Values . . .
Block Definitions
This section describes the Modbus Registers involved in retrieving and interpreting a EPM
7100 meter log. Other sections refer to certain ‘values’ contained in this section. See the
corresponding value in this section for details.
• Register is the Modbus Register Address in 0-based Hexadecimal notation. To
convert it to 1- based decimal notation, convert from hex16 to decimal10 and add
1.
For example: 0x03E7 = 1000.
Note
NOTE
• Size is the number of Modbus Registers (2 byte) in a block of data.
1.
Historical Log Programmable Settings:
The Historical Logs are programmed using a list of Modbus registers that will be copied
into the Historical Log record. In other words, Historical Log uses a direct copy of the
Modbus Registers to control what is recorded at the time of record capture.
B–4
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
RETRIEVING LOGS USING THE MODBUS MAP
To supplement this, the programmable settings for the Historical Logs contain a list of
descriptors, which group registers into items. Each item descriptor lists the data type of the
item, and the number of bytes for that item. By combining these two lists, the Historical
Log record can be interpreted.
For example: Registers 0x03E7 and 0x03E8 are programmed to be recorded by the
historical log. The matching descriptor gives the data type as float, and the size as 4 bytes.
These registers program the log to record “Primary Readings Volts A-N.”
Historical Log Blocks:
Start Register:
0x7917 (Historical Log 1)
0x79D7 (Historical Log 2)
0x7A97 (Historical Log 3)
Block Size:
192 registers per log (384 bytes)
The Historical Log programmable settings are comprised of 3 blocks, one for each log.
Each is identical to the others, so only Historical Log 1 is described here. All register
addresses in this section are given as the Historical Log 1 address (0x7917).
Each Historical Log Block is composed of 3 sections: The header, the list of registers to
log, and the list of item descriptors.
• Header:
Registers: 0x7917 to 0x7918
Size: 2 registers
Byte
0
1
Value
# Registers
# Sectors
2
3
Interval
• # Registers: The number of registers to log in the record. The size of the
record in memory is [12 + (# Registers x 2)]. The size during normal log
retrieval is [6 + (# Registers x 2)]. If this value is 0, the log is disabled. Valid
values are {0 - 117}.
• # Sectors: The number of Flash Sectors allocated to this log. Each sector is
64kb, minus a sector header of 20 bytes. 15 sectors are available for
allocation between Historical Logs 1, 2, and 3. The sum of all Historical
Logs may be less than 15. If this value is 0, the log is disabled. Valid values
are {0-15}.
• Interval: The interval at which the Historical Log’s Records are captured.
This value is an enumeration:
0x01
1 minute
0x02
3 minute
0x04
5 minute
0x08
10 minute
0x10
15 minute
0x20
30 minute
0x40
60 minute
• Register List:
Registers: 0x7919 – 0x798D
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–5
RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Size: 1 register per list item, 117 list items
The Register List controls what Modbus Registers are recorded in each record of
the Historical Log. Since many items, such as Voltage, Energy, etc., take up more
than 1 register, multiple registers need to be listed to record those items.
For example: Registers 0x03E7 and 0x03E8 are programmed to be recorded by the
historical log. These registers program the log to record “Primary Readings Volts AN.”
• Each unused register item should be set to 0x0000 or 0xFFFF to indicate
that it should be ignored.
• The actual size of the record, and the number of items in the register list
which are used, is determined by the # registers in the header.
• Each register item is the Modbus Address in the range of 0x0000 to 0xFFFF.
• Item Descriptor List:
Registers: 0x798E – 0x79C8
Size: 1 byte per item, 117 bytes (59 registers)
While the Register List describes what to log, the Item Descriptor List describes
how to interpret that information. Each descriptor describes a group of register
items, and what they mean.
Each descriptor is composed of 2 parts:
• Type: The data type of this descriptor, such as signed integer, IEEE floating
point, etc. This is the high nibble of the descriptor byte, with a value in the
range of 0-14. If this value is 0xFF, the descriptor should be ignored.
0
ASCII: An ASCII string, or byte array
1
Bitmap: A collection of bit flags
2
Signed Integer: A 2’s Complement integer
3
Float: An IEEE floating point
4
Energy: Special Signed Integer, where the value is adjusted by the
energy settings in the meter’s Programmable Settings.
5
Unsigned Integer
6
Signed Integer 0.1 scale: Special Signed Integer, where the value is
divided by 10 to give a 0.1 scale.
7-14
Unused
15
Disabled: used as end list marker.
• Size: The size in bytes of the item described. This number is used to
determine the pairing of descriptors with register items.
For example: If the first descriptor is 4 bytes, and the second descriptor is 2
bytes, then the first 2 register items belong to the 1st descriptor, and the 3rd
register item belongs to the 2nd descriptor.
Note
NOTE
B–6
As can be seen from the example, above, there is not a 1-to-1 relation between the
register list and the descriptor list. A single descriptor may refer to multiple register items.
Register Items
Descriptors
0x03C7 0x03C8
Float, 4 byte
0x1234
Signed Int, 2 byte
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Note
NOTE
RETRIEVING LOGS USING THE MODBUS MAP
The sum of all descriptor sizes must equal the number of bytes in the data portion of the
Historical Log record.
2.
Log Status Block:
The Log Status Block describes the current status of the log in question. There is one
header block for each of the logs. Each log’s header has the following base address:
Log
Base Address
System:
0xC747
Historical 1:
0xC757
Historical 2:
0xC767
Historical 3:
0xC777
Bytes
Value
Type
Range
# Bytes
0 to 3
Max Records
UINT32
0 to 4, 294,967,294
4
4 to 7
Number of Records Used
UINT32
1 to 4,294,967,294
4
8 to 9
Record Size in Bytes
UINT16
4 to 250
2
10 to 11
Log Availability
UINT16
12 to 17
Timestamp, First Record
TSTAMP
1Jan2000 - 31Dec2099
6
18 to 23
Timestamp, Last Record
TSTAMP
1Jan2000 - 31Dec2099
6
24 to 31
Reserved
2
8
• Max Records: The maximum number of records the log can hold given the record
size, and sector allocation. The data type is an unsigned integer from 0 – 2^32.
• # Records Used: The number of records stored in the log. This number will equal
the Max Records when the log has filled. This value will be set to 1 when the log is
reset. The data type is an unsigned integer from 1 – 2^32.
Note
NOTE
The first record in every log before it has rolled over is a “dummy” record, filled with all
0xFF’s. When the log is filled and rolls over, this record is overwritten.
• Record Size: The number of bytes in this record, including the timestamp. The data
type is an unsigned integer in the range of 14 – 242.
• Log Availability: A flag indicating if the log is available for retrieval, or if it is in use
by another port.
0
Log Available for retrieval
1
In use by COM1 (IrDA)
2
In use by COM2 (RS485)
0xFFFF
Log Not Available - the log cannot be retrieved. This indicates that the log is
disabled.
To query the port by which you are currently connected, use the Port ID register:
Note
NOTE
Register: 0x1193
Size: 1 register
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–7
RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Description: A value from 1-4, which enumerates the port that the requestor is
currently connected on.
• When Log Retrieval is engaged, the Log Availability value will be set to the
port that engaged the log. The Log Availability value will stay the same
until either the log has been disengaged, or 5 minutes have passed with no
activity. It will then reset to 0 (available).
Note
NOTE
• Each log can only be retrieved by one port at a time.
• Only one log at a time can be retrieved.
• First Timestamp: Timestamp of the oldest record.
• Last Timestamp: Timestamp of the newest record.
3.
Log Retrieval Block:
The Log Retrieval Block is the main interface for retrieving logs. It is comprised of 2 parts:
the header and the window. The header is used to program the particular data the meter
presents when a log window is requested. The window is a sliding block of data that can be
used to access any record in the specified log.
• Session Com Port: The EPM 7100 meter’s Com Port which is currently retrieving
logs. Only one Com Port can retrieve logs at any one time.
Registers: 0xC34E – 0xC34E
Size: 1 register
0
No Session Active
1
COM1 (IrDA)
2
COM2 (RS-485)
To get the current Com Port, see the NOTE on querying the port, at the top of this
page.
• The Log Retrieval Header is used to program the log to be retrieved, the record(s)
of that log to be accessed, and other settings concerning the log retrieval.
Registers: 0xC34F – 0xC350
Size: 2 registers
Bytes
Value
Type
Format
Description
# Bytes
0 to 1
Log Number,
Enable, Scope
UINT16
nnnnnnnn
esssssss
nnnnnnnn - log to
retrieve
e - retrieval session
enable
sssssss - retrieval
mode
2
2 to 3
Records per
Window, Number
of Repeats
UINT16
wwwwwwww
nnnnnnnn
wwwwwwww records per
window
nnnnnnnn - repeat
count
2
• Log Number: The log to be retrieved. Write this value to set which log is
being retrieved.
B–8
0
System Events
1
Historical Log 1
2
Historical Log 2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
3
RETRIEVING LOGS USING THE MODBUS MAP
Historical Log 3
• Enable: This value sets if a log retrieval session is engaged (locked for
retrieval) or disengaged (unlocked, read for another to engage). Write this
value with 1(enable) to begin log retrieval. Write this value with 0 (disable)
to end log retrieval.
0
Disable
1
Enable
• Scope: Sets the amount of data to be retrieved for each record. The default
should be 0 (normal).
0
Normal
1
Timestamp Only
2
Image
•
Normal [0]: The default record. Contains a 6-byte timestamp at
the beginning, then N data bytes for the record data.
•
Timestamp [1]: The record only contains the 6-byte timestamp.
This is most useful to determine a range of available data for
non-interval based logs, such as Alarms and System Events.
•
Image [2]: The full record, as it is stored in memory. Contains a 2byte checksum, 4-byte sequence number, 6-byte timestamp, and
then N data bytes for the record data.
• Records Per Window: The number of records that fit evenly into a window.
This value is settable, as less than a full window may be used. This number
tells the retrieving program how many records to expect to find in the
window.
(RecPerWindow x RecSize) = #bytes used in the window.
This value should be ((123 x 2) \ recSize), rounded down.
For example, with a record size of 30, the RecPerWindow = ((123 x 2) \ 30) = 8.2
~= 8
• Number of Repeats: Specifies the number of repeats to use for the
Modbus Function Code 0x23 (35). Since the meter must pre-build the
response to each log window request, this value must be set once, and
each request must use the same repeat count. Upon reading the last
register in the specified window, the record index will increment by the
number of repeats, if auto-increment is enabled. Section B.5.4.2 has
additional information on Function Code 0x23.
0
Disables auto-increment
1
No Repeat count, each request will only get 1 window.
2 to 8 2-8 windows returned for each Function Code 0x23 request.
Bytes
Value
Type
0-3
Offset of First
Record in Window
UINT32
4 - 249
Log Retrieve
Window
UINT16
Format
Description
ssssssss nnnnnnnn
ssssssss - window
nnnnnnnn nnnnnnnn status
nn…nn - 24-bit record
index number.
# Bytes
4
246
• The Log Retrieval Window block is used to program the data you want to retrieve
from the log. It also provides the interface used to retrieve that data.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–9
RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Registers: 0xC351 - 0xC3CD
Size: 125 registers
• Window Status: The status of the current window. Since the time to
prepare a window may exceed an acceptable modbus delay (1 second),
this acts as a state flag, signifying when the window is ready for retrieval.
When this value indicates that the window is not ready, the data in the
window should be ignored.
Window Status is Read-only, any writes are ignored.
0
Window is Ready
0xFF
Window is Not Ready
• Record Number: The record number of the first record in the data window.
Setting this value controls which records will be available in the data
window.
Note
•
When the log is engaged, the first (oldest) record is “latched.” This
means that record number 0 will always point to the oldest
record at the time of latching, until the log is disengaged
(unlocked).
•
To retrieve the entire log using auto-increment, set this value to
0, and retrieve the window repeatedly, until all records have been
retrieved.
•
When auto-increment is enabled, this value will automatically increment so that the
window will “page” through the records, increasing by RecordsPerWindow each time
that the last register in the window is read.
•
When auto-increment is not enabled, this value must be written-to manually, for
each window to be retrieved.
NOTE
• Log Retrieval Data Window: The actual data of the records, arranged
according to the above settings.
B.5.4
Log Retrieval
Log Retrieval is accomplished in 3 basic steps:
1.
Engage the log.
2.
Retrieve each of the records.
3.
Disengage the log.
Auto-Increment
B–10
•
In this Modbus retrieval system, you write the index of the block of data to retrieve,
then read that data from a buffer (window). To improve the speed of retrieval, the
index can be automatically incremented each time the buffer is read.
•
In the EPM 7100 meter, when the last register in the data window is read, the record
index is incremented by the Records per Window.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
RETRIEVING LOGS USING THE MODBUS MAP
Modbus Function Code 0x23
QUERY
Field Name
Example (Hex)
Slave Address
01
Function
23
Starting Address Hi
C3
Starting Address Lo
51
# Points Hi
00
# Points Lo
7D
Repeat Count
04
RESPONSE
Field Name
Example (Hex)
Slave Address
01
Function
23
# Bytes Hi
03
# Bytes Lo
E0
Data
...
Function Code 0x23 is a user-defined Modbus function code, which has a format similar to
Function Code 0x03, except for the inclusion of a “repeat count.” The repeat count (RC) is
used to indicate that the same N registers should be read RC number of times. (See the
Number of Repeats bullet on page B-9.)
Note
NOTE
• By itself this feature would not provide any advantage, as the same data will be
returned RC times. However, when used with auto-incrementing, this function
condenses up to 8 requests into 1 request, which decreases communication time,
as fewer transactions are being made.
• Keep in mind that the contents of the response data is the block of data you
requested, repeated N times. For example, when retrieving log windows, you
normally request both the window index, and the window data. This means that
the first couple of bytes of every repeated block will contain the index of that
window.
• In the EPM 7100 meter repeat counts are limited to 8 times for Modbus RTU, and 4
times for Modbus ASCII.
The response for Function Code 0x23 is the same as for Function Code 0x03, with the data
blocks in sequence.
Note
NOTE
Before using function code 0x23, always check to see if the current connection supports it.
Some relay devices do not support user defined function codes; if that is the case, the
message will stall. Other devices don’t support 8 repeat counts.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Log Retrieval Procedure
The following procedure documents how to retrieve a single log from the oldest record to
the newest record, using the “normal” record type (see Scope). All logs are retrieved using
the same method. See Section B.5.4.4 for a Log Retrieval example.
Note
NOTE
•
This example uses auto-increment.
•
In this example, Function Code 0x23 is not used
•
You will find referenced topics in Section B.5.3. Block Definitions.
•
Modbus Register numbers are listed in brackets.
1.
Engage the Log:
• Read the Log Status Block.
• Read the contents of the specific logs’ status block [0xC737+, 16 reg] (see
Log Headers).
• Store the # of Records Used, the Record Size, and the Log Availability.
• If the Log Availability is not 0, stop Log Retrieval; this log is not available at
this time. If Log Availability is 0, proceed to step 1b (Engage the log).
This step is done to ensure that the log is available for retrieval, as well
as retrieving information for later use.
• Engage the log.
Write log to engage to Log Number, 1 to Enable, and the desired mode to Scope
(default 0 (Normal)) [0xC34F, 1 reg]. This is best done as a single-register write. This
step will latch the first (oldest) record to index 0, and lock the log so that only this
port can retrieve the log, until it is disengaged.
• Verify the log is engaged.
Read the contents of the specific logs’ status block [0xC737+, 16 reg] again to see
if the log is engaged for the current port (see Log Availability). If the Log is not
engaged for the current port, repeat step 1b (Engage the log).
• Write the retrieval information.
Compute the number of records per window, as follows:
RecordsPerWindow = (246 \ RecordSize)
•
If using 0x23, set the repeat count to 2-8. Otherwise, set it to 1.
•
Since we are starting from the beginning for retrieval, the first
record index is 0.
Write the Records per window, the Number of repeats (1), and Record Index (0)
[0xC350, 3 reg].
This step tells the EPM 7100 meter what data to return in the window.
2.
Retrieve the records:
• Read the record index and window.
Read the record index, and the data window [0xC351, 125 reg].
• If the meter Returns a Slave Busy Exception, repeat the request.
• If the Window Status is 0xFF, repeat the request.
• If the Window Status is 0, go to step 2b (Verify record index).
•
Note
NOTE
B–12
We read the index and window in 1 request to minimize communication time, and to
ensure that the record index matches the data in the data window returned.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
•
RETRIEVING LOGS USING THE MODBUS MAP
Space in the window after the last specified record (RecordSize x RecordPerWindow) is
padded with 0xFF, and can be safely discarded.
• Verify that the record index incremented by Records Per Window.
The record index of the retrieved window is the index of the first record in the
window.
This value will increase by Records Per Window each time the window is read, so it
should be 0, N, N x 2, N x 3 . . . for each window retrieved.
• If the record index matches the expected record index, go to step 2c
(Compute next expected record index).
• If the record index does not match the expected record index, then go to
step 1d (Write the retrieval information), where the record index will be the
same as the expected record index. This will tell the EPM 7100 meter to
repeat the records you were expecting.
• Compute next Expected Record Index.
• If there are no remaining records after the current record window, go to
step 3 (Disengage the log).
• Compute the next expected record index by adding Records Per Window,
to the current expected record index. If this value is greater than the
number of records, resize the window so it only contains the remaining
records and go to step 1d (Write the retrieval information), where the
Records Per Window will be the same as the remaining records.
3.
Disengage the log:
Write the Log Number (of log being disengaged) to the Log Index and 0 to the Enable bit
[0xC34F, 1 reg].
Log Retrieval Example
The following example illustrates a log retrieval session. The example makes the following
assumptions:
• Log Retrieved is Historical Log 1 (Log Index 2).
• Auto-Incrementing is used.
• Function Code 0x23 is not used (Repeat Count of 1).
• The Log contains Volts-AN, Volts-BN, Volts-CN (12 bytes).
• 100 Records are available (0-99).
• COM Port 2 (RS-485) is being used (see Log Availability).
• There are no Errors.
• Retrieval is starting at Record Index 0 (oldest record).
• Protocol used is Modbus RTU. The checksum is left off for simplicity.
• The EPM 7100 meter is at device address 1.
• No new records are recorded to the log during the log retrieval process.
1.
Read [0xC757, 16 reg], Historical Log 1 Header Block.
Send: 0103 C757 0010
Command:
Register Address: 0xC757
# Registers:
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
-----------------------------Receive: 010320 00000100 00000064 0012 0000 060717101511
060718101511 0000000000000000
Data:
Max Records:
0x100 = 256 records maximum.
Num Records:
0x64 = 100 records currently logged.
Record Size:
0x12 = 18 bytes per record.
Log Availability:
0x00 = 0, not in use, available for retrieval.
First Timestamp: 0x060717101511 = July 23, 2006, 16:21:17
Last Timestamp: 0x060717101511 = July 24, 2006, 16:21:17
The above indicates that Historical Log 1 is available for retrieval.
Note
NOTE
2.
Write 0x0280 -> [0xC34F, 1 reg], Log Enable.
Send: 0106 C34F 0280
Command:
- Register Address: 0xC34F
- # Registers: 1 (Write Single Register Command)
Data:
- Log Number: 2 (Historical Log 1)
- Enable: 1 (Engage log)
- Scope: 0 (Normal Mode)
-----------------------------Receive: 0106C34F0280 (echo)
Note
NOTE
The above engages the log for use on this COM Port, and latches the oldest record as
record index 0.
3.
Read [0xC757, 16 reg], Availability is 0.
Send: 0103 C757 0010
Command:
- Register Address: 0xC757
- # Registers: 16
-----------------------------Receive:
010320 00000100 00000064 0012 0002 060717101511
060718101511 0000000000000000
Data:
- Max Records: 0x100 = 256 records maximum.
- Num Records: 0x64 = 100 records currently logged.
- Record Size: 0x12 = 18 bytes per record.
- Log Availability: 0x02 = 2, In use by COM2, RS485 (the current port)
- First Timestamp: 0x060717101511 = July 23, 2006, 16:21:17
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EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
RETRIEVING LOGS USING THE MODBUS MAP
- Last Timestamp: 0x060717101511 = July 24, 2006, 16:21:17
Note
NOTE
The above indicates that the log has been engaged properly in step 2. Proceed to retrieve
the log.
4.
Compute #RecPerWin as (246\18)=13. Write 0x0D01 0000 0000 -> [0xC350, 3 reg]
Write Retrieval Info. Set Current Index as 0.
Send:
0110 C350 0003 06 0D01 00 000000
Command:
- Register Address: 0xC350
- # Registers: 3, 6 bytes
Data:
- Records per Window: 13. Since the window is 246 bytes, and the record is
18 bytes, 246\18 = 13.66, which means that 13 records evenly fit into a
single window. This is 234 bytes, which means later on, we only need to
read 234 bytes (117 registers) of the window to retrieve the records.
- # of Repeats: 1. We are using auto-increment (so not 0), but not function
code 0x23.
- Window Status: 0 (ignore)
- Record Index: 0, start at the first record.
-----------------------------Receive: 0110C3500003 (command ok)
Note
NOTE
•
The above sets up the window for retrieval; now we can start retrieving the records.
•
As noted above, we compute the records per window as 246\18 = 13.66, which is
rounded to 13 records per window. This allows the minimum number of requests to be
made to the meter, which increases retrieval speed.
5.
Read [0xC351, 125 reg], first 2 reg is status/index, last 123 reg is window data.
Status OK.
Send: 0103 C351 007D
Command:
-Register Address: 0xC351
-# Registers: 0x7D, 125 registers
-----------------------------Receive: 0103FA 00000000060717101511FFFFFFFFFFFFFFFFFFFFFFFF
06071710160042FAAACF42FAAD1842FAA9A8 . . .
Data:
- Window Status: 0x00 = the window is ready.
- Index: 0x00 = 0, The window starts with the 0’th record, which is the oldest
record.
- Record 0: The next 18 bytes is the 0’th record (filler).
- Timestamp: 0x060717101511, = July 23, 2006, 16:21:17
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
- Data: This record is the “filler” record. It is used by the meter so that there
is never 0 records. It should be ignored. It can be identified by the data
being all 0xFF.
Note
NOTE
Once a log has rolled over, the 0’th record will be a valid record, and the filler record will
disappear.
-Record 1: The next 18 bytes is the 1’st record.
-Timestamp: 0x060717101600 July 23, 2006, 16:22:00
-Data:
-Volts AN: 0x42FAAACF, float = 125.33~
-Volts BN: 0x42FAAD18, float = 125.33~
-Volts CN: 0x42FAA9A8, float = 125.33~
. . . 13 records
Note
NOTE
Note
NOTE
•
This retrieves the actual window. Repeat this command as many times as necessary
to retrieve all of the records when auto-increment is enabled.
•
Note the filler record. When a log is reset (cleared) in the meter, the meter always adds
a first “filler” record, so that there is always at least 1 record in the log. This “filler”
record can be identified by the data being all 0xFF, and it being index 0. If a record has
all 0xFF for data, the timestamp is valid, and the index is NOT 0, then the record is
legitimate.
•
When the “filler” record is logged, its timestamp may not be “on the interval.” The next
record taken will be on the next “proper interval,” adjusted to the hour.
For example, if the interval is 1 minute, the first “real” record will be taken on the next
minute (no seconds). If the interval is 15 minutes, the next record will be taken at :15,
:30, :45, or :00 - whichever of those values is next in sequence.
6.
Compare the index with Current Index.
•
The Current Index is 0 at this point, and the record index retrieved in step 5 is 0: thus
we go to step 8.
•
If the Current Index and the record index do not match, go to step 7. The data that was
received in the window may be invalid, and should be discarded.
7.
Write the Current Index to [0xC351, 2 reg].
Send: 0110 C351 0002 04 00 00000D
Command:
- Register Address: 0xC351
- # Registers: 2, 4 bytes
Data:
- Window Status: 0 (ignore)
- Record Index: 0x0D = 13, start at the 14th record.
-----------------------------Receive: 0110C3510002 (command ok)
B–16
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Note
NOTE
Note
NOTE
RETRIEVING LOGS USING THE MODBUS MAP
•
This step manually sets the record index, and is primarily used when an out-of-order
record index is returned on a read (step 6).
•
The example assumes that the second window retrieval failed somehow, and we need
to recover by requesting the records starting at index 13 again.
8.
For each record in the retrieved window, copy and save the data for later
interpretation.
9.
Increment Current Index by RecordsPerWindow.
•
This is the step that determines how much more of the log we need to retrieve.
•
On the first N passes, Records Per Window should be 13 (as computed in step 4), and
the current index should be a multiple of that (0, 13, 26, . . .). This amount will decrease
when we reach the end (see step 10).
•
If the current index is greater than or equal to the number of records (in this case 100),
then all records have been retrieved; go to step 12. Otherwise, go to step 10 to check if
we are nearing the end of the records.
10. If number records – current index < RecordsPerWindow, decrease to match.
Note
NOTE
•
Here we bounds-check the current index, so we don’t exceed the records available.
•
If the number of remaining records (#records – current index) is less than the Records
per Window, then the next window is the last, and contains less than a full window of
records. Make records per window equal to remaining records (#records-current
index). In this example, this occurs when current index is 91 (the 8th window). There
are now 9 records available (100-91), so make Records per Window equal 9.
11. Repeat step 5 through 10.
•
Note
NOTE
•
Go back to step 5, where a couple of values have changed.
Pass
CurIndex
FirstRecIndex
RecPerWindow
0
0
0
13
1
13
13
13
2
26
26
13
3
39
39
13
4
52
52
13
5
65
65
13
6
78
78
13
7
91
91
9
8
100
------
-------
At pass 8, since Current Index is equal to the number of records (100), log retrieval
should stop; go to step 12 (see step 9 Notes).
12. No more records available, clean up.
13. Write 0x0000 -> [0xC34F, 1 reg], disengage the log.
Send: 0106 C34F 0000
Command:
- Register Address: 0xC34F
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
- # Registers: 1 (Write Single Register Command)
Data:
- Log Number: 0 (ignore)
- Enable: 0 (Disengage log)
- Scope: 0 (ignore)
-----------------------------Receive: 0106C34F0000 (echo)
Note
NOTE
B.5.5
•
This disengages the log, allowing it to be retrieved by other COM ports.
•
The log will automatically disengage if no log retrieval action is taken for 5 minutes.
Log Record Interpretation
The records of each log are composed of a 6 byte timestamp, and N data. The content of
the data portion depends on the log.
1.
Byte
0
Value
1
2
System Event Record:
3
4
5
Timestamp
6
Group
7
Event
8
9
Mod
Chan
10
11
12
13
Param1
Param2
Param3
Param4
Size: 14 bytes (20 bytes image).
Data: The System Event data is 8 bytes; each byte is an enumerated value.
• Group: Group of the event.
• Event: Event within a group.
• Modifier: Additional information about the event, such as number of
sectors or log number.
• Channel: The Port of the EPM 7100 meter that caused the event.
0 Firmware
1 COM 1 (IrDA)
2 COM 2 (RS485)
7 User (Face Plate)
• Param 1-4: These are defined for each event (see table on the next page).
Note
NOTE
Group
(Event
group)
Event
(Event
within
group)
The System Log Record is 20 bytes, consisting of the Record Header (12 bytes) and Payload
(8 bytes). The Timestamp (6 bytes) is in the header. Typically, software will retrieve only the
timestamp and payload, yielding a 14-byte record. The table on the next page shows all
defined payloads.
Mod
(Event
modifier)
Channel
(1-4 for
COMs, 7
for USER,
0 for FW)
Parm1
0
Parm3
Parm4
Comments
Startup
0
B–18
Parm2
0
0
FW version
Meter Run Firmware Startup
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
RETRIEVING LOGS USING THE MODBUS MAP
1
Log Activity
1
log#
1-4
0xFF
0xFF
0xFF
0xFF
Reset
2
log#
1-4
0xFF
0xFF
0xFF
0xFF
Log Retrieval Begin
3
log#
0-4
0xFF
0xFF
0xFF
0xFF
Log Retrieval End
2
Clock Activity
1
0
1-4
0xFF
0xFF
0xFF
0xFF
Clock Changed
2
0
0
0xFF
0xFF
0xFF
0xFF
Daylight Time On
3
0
0
0xFF
0xFF
0xFF
0xFF
Daylight Time Off
4
sync
method
0
0xFF
0xFF
0xFF
0xFF
Auto Clock Sync Failed
5
sync
method
0
0xFF
0xFF
0xFF
0xFF
Auto Clock Sync Resumed
3
System Resets
1
0
0-4, 7
0xFF
0xFF
0xFF
0xFF
Max & Min Reset
2
0
0-4, 7
0xFF
0xFF
0xFF
0xFF
Energy Reset
3
slot#
0-4
1 (inputs)
or 2
(outputs)
0xFF
0xFF
0xFF
Accumulators Reset
4
Settings Activity
1
0
1-4, 7
0xFF
0xFF
0xFF
0xFF
Password Changed
2
0
1-4
0xFF
0xFF
0xFF
0xFF
Software Option Changed
3
0
1-4, 7
0xFF
0xFF
0xFF
0xFF
Programmable Settings
Changed
4
0
1-4, 7
0xFF
0xFF
0xFF
0xFF
Measurement Stopped
5
Boot Activity
1
0
1-4
FW version
Exit to Boot
6
Error Reporting & Recovery
4
log #
0
0xFF
0xFF
0xFF
0xFF
Log Babbling Detected
5
log #
0
# records discarded
time in seconds
Babbling Log Periodic
Summary
6
log #
0
# records discarded
time in seconds
Log Babbling End Detected
7
sector#
0
error count
stimulus
0xFF
Flash Sector Error
8
0
0
0xFF
0xFF
0xFF
0xFF
Flash Error Counters Reset
9
0
0
0xFF
0xFF
0xFF
0xFF
Flash Job Queue Overflow
10
1
0
0xFF
0xFF
0xFF
0xFF
Bad NTP Configuration
1
sector#
0
log #
0xFF
0xFF
0xFF
acquire sector
2
sector#
0
log #
0xFF
0xFF
0xFF
release sector
0x88
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APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
3
sector#
0
erase count
4
log#
0
0xFF
erase sector
0xFF
0xFF
0xFF
write log start record
• log# values: 0 = system log, 1 = alarms log, 2-4 = historical logs 1-3, 5 = I/O change
log
• sector# values: 0-63
• slot# values: 1-2
•
Note
NOTE
The clock changed event shows the clock value just before the change in the Mod and
Parm bytes. Parms are bit-mapped:
• b31 - b28 month
• b27 - b23 day
• b22 daylight savings time flag
• b20 - b16 hour
• b13 - b8 minute
• b5 - b0 second
• unused bits are always 0
•
Sync method: 1 = NTP.
•
Stimulus for a flash sector error indicates what the flash was doing when the error
occurred: 1 = acquire sector, 2 = startup, 3 = empty sector, 4 = release sector, 5 = write
data
•
Flash error counters are reset to zero in the unlikely event that both copies in EEPROM
are corrupted.
•
The flash job queue is flushed (and log records are lost) in the unlikely event that the
queue runs out of space.
•
A “babbling log” is one that is saving records faster than the meter can handle long
term. Onset of babbling occurs when a log fills a flash sector in less than an hour. For
as long as babbling persists, a summary of records discarded is logged every 60
minutes. Normal logging resumes when there have been no new append attempts for
30 seconds.
•
Logging of diagnostic records may be suppressed via a bit in programmable settings.
2.
Alarm Record:
Byte
0
1
Value
2
3
Timestamp
4
5
6
Direction
7
8
9
Limit# Value
Size: 10 bytes (16 bytes image)
Data: The Alarm record data is 4 bytes, and specifies which limit the event occurred
on, and the direction of the event (going out of limit, or coming back into limit).
Direction: The direction of the alarm event: whether this record indicates the limit
going out, or coming back into limit.
1 Going out of limit
2 Coming back into limit
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EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Byte
0
Value
Type
1
0
RETRIEVING LOGS USING THE MODBUS MAP
2
0
3
0
4
5
6
0
7
Limit ID
Limit Type: Each limit (1-8) has both an above condition and a below condition.
Limit Type indicates which of those the record represents.
0 High Limit
1 Low Limit
Limit ID: The specific limit this record represents. A value in the range 0-7, Limit ID
represents Limits 1-8. The specific details for this limit are stored in the
programmable
settings.
Value: Depends on the Direction:
• If the record is "Going out of limit," this is the value of the limit when the
"Out" condition occurred.
• If the record is "Coming back into limit," this is the "worst" value of the limit
during the period of being "out": for High (above) limits, this is the highest
value during the "out" period; for Low (below) limits, this is the lowest value
during the “out" period.
Byte
0
Value
Identifier
1
2
3
Above Setpoint
4
5
Above Hyst.
6
7
Below Setpoint
8
9
Below Hyst.
Interpretation of Alarm Data:
To interpret the data from the alarm records, you need the limit data from the
Programmable Settings [0x754B, 40 registers].
There are 8 limits, each with an Above Setpoint, and a Below Setpoint. Each setpoint
also has a threshold (hysteresis), which is the value at which the limit returns "into"
limit after the setpoint has been exceeded. This prevents "babbling" limits, which can
be caused by the limit value fluttering over the setpoint, causing it to go in and out of
limit continuously.
Identifier: The first modbus register of the value that is being watched by this limit.
While any modbus register is valid, only values that can have a Full Scale will be
used by the EPM 7100 meter.
Above Setpoint: The percent of the Full Scale above which the value for this limit
will be considered "out."
• Valid in the range of -200.0% to +200.0%
• Stored as an integer with 0.1 resolution. (Multiply % by 10 to get the integer,
divide integer by 10 to get %. For example, 105.2% = 1052.)
Above Hysteresis: The percent of the Full Scale below which the limit will return
"into" limit, if it is out. If this value is above the Above Setpoint, this Above limit will
be disabled.
• Valid in the range of -200.0% to +200.0%.
• Stored as an integer with 0.1 resolution. (Multiply % by 10 to get the integer,
divide integer by 10 to get %. For example, 104.1% = 1041.)
Below Setpoint: The percent of the Full Scale below which the value for this limit
will be considered "out."
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APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
• Valid in the range of -200.0% to +200.0%.
• Stored as an integer with 0.1 resolution. (Multiply % by 10 to get the integer,
divide integer by 10 to get %. For example, 93.5% = 935.)
Below Hysteresis: The percent of the Full Scale above which the limit will return
"into" limit, if it is out. If this value is below the Below Setpoint, this Below limit will
be disabled.
• Valid in the range of -200.0% to +200.0%.
• Stored as an integer with 0.1 resolution. (Multiply % by 10 to get the integer,
divide integer by 10 to get %. For example, 94.9% = 949.)
•
Note
NOTE
The Full Scale is the "nominal" value for each of the different types of readings. To
compute the Full Scale, use the following formulas:
Current
[CT Numerator] x [CT Multiplier]
Voltage
[PT Numerator] x [PT Multiplier]
Power 3-Phase (WYE)
[CT Numerator] x [CT Multiplier] x [PT
Numerator] x [PT Multiplier] x 3
Power 3-Phase (Delta)
[CT Numerator] x [CT Multiplier] x [PT
Numerator] x [PT Multiplier] x 3 x sqrt(3)
Power Single Phase (WYE)
[CT Numerator] x [CT Multiplier] x [PT
Numerator] x [PT Multiplier]
Power Single Phase (Delta)
[CT Numerator] x [CT Multiplier] x [PT
Numerator] x [PT Multiplier] x sqrt(3)
Frequency (Calibrated at 60 Hz)
60
Frequency (Calibrated at 50 Hz)
50
Power Factor
1.0
Angles
180°
•
To interpret a limit alarm fully, you need both the start and end record (for duration).
•
There are a few special conditions related to limits:
•
When the meter powers up, it detects limits from scratch. This means that multiple
"out of limit" records can be in sequence with no "into limit" records. Cross- reference
the System Events for Power Up events.
•
This also means that if a limit is "out," and it goes back in during the power off
condition, no "into limit" record will be recorded.
•
The "worst" value of the "into limit" record follows the above restrictions; it only
represents the values since power up. Any values before the power up condition are
lost.
3.
Historical Log Record:
Byte
Value
0
1
2
3
Timestamp
4
5
6
.
.
N
Values . . .
Size: 6+2 x N bytes (12+2 x N bytes), where N is the number of registers stored.
Data: The Historical Log Record data is 2 x N bytes, which contains snapshots of the
values of the associated registers at the time the record was taken. Since the meter
uses specific registers to log, with no knowledge of the data it contains, the
Programmable Settings need to be used to interpret the data in the record. See
Historical Logs Programmable Settings for details.
B–22
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
B.5.6
RETRIEVING LOGS USING THE MODBUS MAP
Examples
1.
Log Retrieval Section:
send: 01 03 75 40 00 08 - Meter designation
recv: 01 03 10 4D 65 74 72 65 44 65 73 69 6E 67 5F 20 20 20 20 00 00
send: :01 03 C7 57 00 10 - Historical Log 1 status block
recv: :01 03 20 00 00 05 1E 00 00 05 1E 00 2C 00 00 06 08 17 51 08
00 06 08 18 4E 39 00 00 00 00 00 00 00 00 00 00 00
send: :01 03 79 17 00 40 - Historical Log 1 PS settings
recv: :01 03 80 13 01 00 01 23 75 23 76 23 77 1F 3F 1F 40 1F 41 1F
42 1F 43 1F 44 06 0B 06 0C 06 0D 06 0E 17 75 17 76 17 77 18
67 18 68 18 69 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00
send: :01 03 79 57 00 40 - ""
recv: :01 03 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 62 62 62 34 34 34 44
44 62 62 62 62 62 62 00 00 00 00 00 00
send: :01 03 75 35 00 01 - Energy PS settings
recv: :01 03 02 83 31 00 00
send: :01 03 11 93 00 01 - Connected Port ID
recv: :01 03 02 00 02 00 00
send: :01 03 C7 57 00 10 - Historical Log 1 status block
recv: :01 03 20 00 00 05 1E 00 00 05 1E 00 2C 00 00 06 08 17 51 08
00 06 08 18 4E 39 00 00 00 00 00 00 00 00 00 00 00
send: :01 03 C3 4F 00 01 - Log Retrieval header
recv: :01 03 02 FF FF 00 00
send: :01 10 C3 4F 00 04 08 02 80 05 01 00 00 00 00 - Engage the log
recv: :01 10 C3 4F 00 04
send: :01 03 C7 57 00 10 - Historical Log 1 status block
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–23
RETRIEVING LOGS USING THE MODBUS MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
recv: :01 03 20 00 00 05 1E 00 00 05 1E 00 2C 00 02 06 08 17 51 08
00 06 08 18 4E 39 00 00 00 00 00 00 00 00 00 00 00
send: :01 10 C3 51 00 02 04 00 00 00 00 - Set the retrieval index
recv: :01 10 C3 51 00 02
send: :01 03 C3 51 00 40 - Read first half of window
recv: :01 03 80 00 00 00 00 06 08 17 51 08 00 00 19 00 2F 27 0F 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03
E8 00 01 00 05 00 00 00 00 00 00 06 08 17 51 09 00 00 19 00
2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 03 E8 00 01 00 04 00 00 00 00 00 00 06 08 17 51 0A
00 00 19 00 2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 03 E8 00 00 00 00
send: :01 03 C3 91 00 30 - Read second half of window
recv: :01 03 60 00 05 00 00 00 00 00 00 06 08 17 51 0B 00 00 19 00
2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 03 E8 00 01 00 04 00 00 00 00 00 00 06 08 17 51 0C
00 00 19 00 2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 03 E8 00 01 00 04 00 00 00 00 00 00 00
00
send: :01 03 C3 51 00 40 - Read first half of last window
recv: :01 03 80 00 00 05 19 06 08 18 4E 35 00 00 19 00 2F 27 0F 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03
E8 00 01 00 04 00 00 00 00 00 00 06 08 18 4E 36 00 00 19 00
2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 03 E8 00 01 00 04 00 00 00 00 00 00 06 08 18 4E 37
00 00 19 00 2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 03 E8 00 00 00 00
send: :01 03 C3 91 00 30 - Read second half of last window
recv: :01 03 60 00 05 00 00 00 00 00 00 06 08 18 4E 38 00 00 19 00
2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 03 E8 00 01 00 04 00 00 00 00 00 00 06 08 18 4E 39
00 00 19 00 2F 27 0F 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 03 E8 00 00 00 05 00 00 00 00 00 00 00
00
send: :01 06 C3 4F 00 00 - Disengage the log
recv: :01 06 C3 4F 00 00
2.
Sample Historical Log 1 Record:
Historical Log 1 Record and Programmable Settings
13|01|00 01|23 75|23 76|23 77|1F 3F 1F 40|1F 41
B–24
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
RETRIEVING LOGS USING THE MODBUS MAP
1F 42|1F 43 1F 44|06 0B 06 0C|06 0D 06 0E|17 75|
17 76|17 77|18 67|18 68|18 69|00 00 . . . . . .
62 62 62 34 34 34 44 44 62 62 62 62 62 62 . . .
These are the Item These are the These are the Descriptions:
Values: Type and Size:
13 - # registers
01 - # sectors
01 - interval
23 75 6 2 - (SINT 2 byte) Volts A THD Maximum
23 76 6 2 - (SINT 2 byte) Volts B THD Maximum
23 77 6 2 - (SINT 2 byte) Volts C THD Maximum
1F 3F 1F 40 3 4 - (Float 4 byte) Volts A Minimum
1F 41 1F 42 3 4 - (Float 4 byte) Volts B Minimum
1F 43 1F 44 3 4 - (Float 4 byte) Volts C Minimum
06 0B 06 0C 4 4 - (Energy 4 byte) VARhr Negative Phase A
06 0D 06 0E 4 4 - (Energy 4 byte) VARhr Negative Phase B
17 75 6 2 - (SINT 2 byte) Volts A 1st Harmonic
Magnitude
17 76 6 2 - (SINT 2 byte) Volts A 2nd Harmonic
Magnitude
17 77 6 2 - (SINT 2 byte) Volts A 3rd Harmonic
Magnitude
18 67 6 2 - (SINT 2 byte) Ib 3rd Harmonic Magnitude
18 68 6 2 - (SINT 2 byte) Ib 4th Harmonic Magnitude
18 69 6 2 - (SINT 2 byte) Ib 5th Harmonic Magnitude
Sample Record
06 08 17 51 08 00|00 19|00 2F|27 0F|00 00 00 00|00
00 00 00|00 00 00 00|00 00 00 00|00 00 00 00|03 E8|
00 01|00 05|00 00|00 00|00 00 . . .
06 08 17 51 08 00 - August 23, 2006 17:08:00
00 19 - 2.5%
00 2F - 4.7%
27 0F - 999.9% (indicates the value isn’t valid)
00 00 00 00 - 0
00 00 00 00 - 0
00 00 00 00 - 0
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–25
IMPORTANT NOTE CONCERNING THE EPM 7100 MODBUS MAP APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100
METER
00 00 00 00 - 0
00 00 00 00 - 0
03 E8 - 100.0% (Fundamental)
00 01 - 0.1%
00 05 - 0.5%
00 00 - 0.0%
00 00 - 0.0%
00 00 - 0.0%
B.6
Important Note concerning the EPM 7100 Modbus Map
In depicting Modbus Registers (Addresses), the EPM 7100 meter's Modbus map uses
Holding Registers only.
B.6.1
Hex Representation
The representation shown in the table below is used by developers of Modbus drivers and
libraries, SEL 2020/2030 programmers and Firmware Developers. The EPM 7100 meter's
Modbus map also uses this representation.
Hex
0008 - 000F
B.6.2
Description
Meter Serial
Number
Decimal Representation
The EPM 7100 meter's Modbus map defines Holding Registers as (4X) registers. Many
popular SCADA and HMI packages and their Modbus drivers have user interfaces that
require users to enter these Registers starting at 40001. So instead of entering two
separate values, one for register type and one for the actual register, they have been
combined into one number.
The EPM 7100 meter's Modbus map uses a shorthand version to depict the decimal fields,
i.e., not all of the digits required for entry into the SCADA package UI are shown. For
example:
You need to display the meter's serial number in your SCADA application. The EPM 7100
meter's Modbus map shows the following information for meter serial number:
Decimal
9-16
Description
Meter Serial Number
In order to retrieve the meter's serial number, enter 40009 into the SCADA UI as the starting
register, and 8 as the number of registers.
• In order to work with SCADA and Driver packages that use the 40001 to 49999
method for requesting holding registers, take 40000 and add the value of the
B–26
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
register (Address) in the decimal column of the Modbus Map. Then enter the
number (e.g., 4009) into the UI as the starting register.
• For SCADA and Driver packages that use the 400001 to 465536 method for
requesting holding registers take 400000 and add the value of the register
(Address) in the decimal column of the Modbus Map. Then enter the number (e.g.,
400009) into the UI as the starting register. The drivers for these packages strip off
the leading four and subtract 1 from the remaining value. This final value is used
as the starting register or register to be included when building the actual modbus
message.
B.7
Modbus Register Map
Table B–1: (Sheet 1 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
Fixed Data Section
Identification Block
read-only
0000
- 0007
1
- 8
Meter Name
ASCII
16 char
none
8
0008
- 000F
9
- 16
Meter Serial
Number
ASCII
16 char
none
8
0010
- 0010
17
- 17
Meter Type
UINT16
bit-mapped
------st ----vvv
0011
- 0012
18
- 19
Firmware Version
ASCII
4 char
none
t=0
s= 1
vvv = software option:
V33 = standard EPM 7100
1
2
0013
- 0013
20
- 20
Map Version
UINT16
0 to 65535
none
0014
- 0014
21
- 21
Meter Configuration
UINT16
bit-mapped
-----ccc -ffffff
1
0015
- 0015
22
- 22
ASIC Version
UINT16
0-65535
none
1
0016
- 0017
23
- 24
Boot Firmware
Version
ASCII
4 char
none
2
0018
- 18
25
- 25
Reserved
ccc = CT denominator (1 or 5),
ffffff = calibration frequency (50 or
60)
1
1
0019
- 19
26
- 26
Reserved
001A
- 001D
27
- 30
Meter Type Name
1
001E
- 26
31
- 39
Reserved
Reserved
9
0027
- 002E
40
- 47
Reserved
Reserved
8
002F
- 115
48
- 278
Reserved
Reserved
231
0116
- 0130
279
- 305
Integer Readings
Block occupies
these registers, see
below
0131
- 01F3
306
- 500
Reserved
01F4
- 0203
501
- 516
Reserved
ASCII
8 char
none
4
194
Reserved
16
16
Meter Data Section (Note 2)
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–27
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 2 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Readings Block ( Integer values)
Comments
#
Reg
read-only
0116
- 0117
280
- 280
Volts B-N
UINT16
0 to 9999
volts
0117
- 0118
281
- 281
Volts C-N
UINT16
0 to 9999
volts
0118
- 0119
282
- 282
Volts A-B
UINT16
0 to 9999
volts
1.Use the settings from
Programmable settings for scale
and decimal point location. (see
User Settings Flags)
2. Per phase power and PF have
values
only for WYE hookup and will be
zero for all other hookups.
1
1
1
0119
- 011A
283
- 283
Volts B-C
UINT16
0 to 9999
volts
011A
- 011B
284
- 284
Volts C-A
UINT16
0 to 9999
volts
1
011B
- 011C
285
- 285
Amps A
UINT16
0 to 9999
amps
011C
- 011D
286
- 286
Amps B
UINT16
0 to 9999
amps
011D
- 011E
287
- 287
Amps C
UINT16
0 to 9999
amps
011E
- 011F
288
- 288
Neutral Current
UINT16
-9999 to
+9999
amps
011F
- 0120
289
- 289
Watts, 3-Ph total
SINT16
-9999 to
+9999
watts
1
3. If the reading is 10000 that
1
means that the value is out of
1
range. Please adjust the
programmable settings in that
case. The display will also show '---- 1
' in case of over range.
1
0120
- 0121
290
- 290
VARs, 3-Ph total
SINT16
-9999 to
+9999
VARs
1
0121
- 0122
291
- 291
VAs, 3-Ph total
UINT16
0 to +9999
VAs
1
0122
- 0123
292
- 292
Power Factor, 3-Ph
total
SINT16
-1000 to
+1000
none
1
0123
- 0124
293
- 293
Frequency
UINT16
0 to 9999
Hz
1
0124
- 0125
294
- 294
Watts, Phase A
SINT16
-9999 M to
+9999
watts
1
0125
- 0126
295
- 295
Watts, Phase B
SINT16
-9999 M to
+9999
watts
1
0126
- 0127
296
- 296
Watts, Phase C
SINT16
-9999 M to
+9999
watts
1
0127
- 0128
297
- 297
VARs, Phase A
SINT16
-9999 M to
+9999 M
VARs
1
0128
- 0129
298
- 298
VARs, Phase B
SINT16
-9999 M to
+9999 M
VARs
1
0129
- 012A
299
- 299
VARs, Phase C
SINT16
-9999 M to
+9999 M
VARs
1
012A
- 012B
300
- 300
VAs, Phase A
UINT16
0 to +9999
VAs
1
1
012B
- 012C
301
- 301
VAs, Phase B
UINT16
0 to +9999
VAs
1
012C
- 012D
302
- 302
VAs, Phase C
UINT16
0 to +9999
VAs
1
012D
- 012E
303
- 303
Power Factor, Phase
A
SINT16
-1000 to
+1000
none
1
012E
- 012F
304
- 304
Power Factor, Phase
B
SINT16
-1000 to
+1000
none
1
012F
- 130
305
- 305
Power Factor, Phase
C
SINT16
-1000 to
+1000
none
1
0130
- 0130
305
- 305
Power Factor, Phase
C
SINT16
-1000 to
+1000
none
1
`
Block Size:
Primary Readings Block
read-only
27
03E7
- 03E8
1000
- 1001
Volts A-N
FLOAT
0 to 9999 M
volts
2
03E9
- 03EA
1002
- 1003
Volts B-N
FLOAT
0 to 9999 M
volts
2
03EB
- 03EC
1004
- 1005
Volts C-N
FLOAT
0 to 9999 M
volts
2
B–28
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 3 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
03ED
- 03EE
1006
- 1007
Volts A-B
FLOAT
0 to 9999 M
volts
2
03EF
- 03F0
1008
- 1009
Volts B-C
FLOAT
0 to 9999 M
volts
2
03F1
- 03F2
1010
- 1011
Volts C-A
FLOAT
0 to 9999 M
volts
2
03F3
- 03F4
1012
- 1013
Amps A
FLOAT
0 to 9999 M
amps
2
03F5
- 03F6
1014
- 1015
Amps B
FLOAT
0 to 9999 M
amps
2
03F7
- 03F8
1016
- 1017
Amps C
FLOAT
0 to 9999 M
amps
2
03F9
- 03FA
1018
- 1019
Watts, 3-Ph total
FLOAT
-9999 M to
+9999 M
watts
2
03FB
- 03FC
1020
- 1021
VARs, 3-Ph total
FLOAT
-9999 M to
+9999 M
VARs
2
03FD
- 03FE
1022
- 1023
VAs, 3-Ph total
FLOAT
-9999 M to
+9999 M
VAs
2
03FF
- 0400
1024
- 1025
Power Factor, 3-Ph
total
FLOAT
-1.00 to
+1.00
none
2
0401
- 0402
1026
- 1027
Frequency
FLOAT
0 to 65.00
Hz
2
0403
- 0404
1028
- 1029
Neutral Current
FLOAT
0 to 9999 M
amps
0405
- 0406
1030
- 1031
Watts, Phase A
FLOAT
-9999 M to
+9999 M
watts
0407
- 0408
1032
- 1033
Watts, Phase B
FLOAT
-9999 M to
+9999 M
watts
0409
- 040A
1034
- 1035
Watts, Phase C
FLOAT
-9999 M to
+9999 M
watts
2
040B
- 040C
1036
- 1037
VARs, Phase A
FLOAT
-9999 M to
+9999 M
VARs
2
040D
- 040E
1038
- 1039
VARs, Phase B
FLOAT
-9999 M to
+9999 M
VARs
2
040F
- 0410
1040
- 1041
VARs, Phase C
FLOAT
-9999 M to
+9999 M
VARs
2
0411
- 0412
1042
- 1043
VAs, Phase A
FLOAT
-9999 M to
+9999 M
VAs
2
0413
- 0414
1044
- 1045
VAs, Phase B
FLOAT
-9999 M to
+9999 M
VAs
2
0415
- 0416
1046
- 1047
VAs, Phase C
FLOAT
-9999 M to
+9999 M
VAs
2
0417
- 0418
1048
- 1049
Power Factor, Phase
A
FLOAT
-1.00 to
+1.00
none
2
0419
- 041A
1050
- 1051
Power Factor, Phase
B
FLOAT
-1.00 to
+1.00
none
2
041B
- 041C
1052
- 1053
Power Factor, Phase
C
FLOAT
-1.00 to
+1.00
none
2
041D
- 041E
1054
- 1055
Symmetrical
Component
Magnitude, 0 Seq
FLOAT
0 to 9999 M
volts
041F
- 420
1056
- 1057
Symmetrical
Component
Magnitude, + Seq
FLOAT
0 to 9999 M
volts
421
- 422
1058
- 1059
Symmetrical
Component
Magnitude, - Seq
FLOAT
0 to 9999 M
volts
2
423
- 423
1060
- 1060
Symmetrical
Component Phase,
0 Seq
SINT16
-1800 to
+1800
0.1 degree
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
2
Per phase power and PF have
values
only for WYE hookup and will be
zero for all other hookups.
Voltage unbalance per IEC61004.30
Values apply only to WYE hookup
and
will be zero for all other hookups.
2
2
2
2
B–29
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 4 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
424
- 424
1061
- 1061
Symmetrical
Component Phase,
+ Seq
SINT16
-1800 to
+1800
0.1 degree
1
425
- 425
1062
- 1062
Symmetrical
Component Phase, Seq
SINT16
-1800 to
+1800
0.1 degree
1
426
- 426
1063
- 1063
Unbalance, 0
sequence
component
UINT16
0 to 10000
0.01%
1
427
- 427
1064
- 1064
Unbalance, sequence
component
UINT16
0 to 10000
0.01%
1
428
- 428
1065
- 1065
Current Unbalance
UINT16
0 to 20000
0.01%
Block Size:
Primary Energy Block
05DB
05DD
05DC
1500
- 05DE
1502
-
66
read-only
1501
W-hours, Received
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
- 1503
W-hours, Delivered
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
-
* Wh received & delivered always
have opposite signs
* Wh received is positive for "view
as load", delivered is positive for
"view as generator"
2
2
* 5 to 8 digits
* decimal point implied, per energy
format
2
* resolution of digit before decimal
point = units, kilo, or mega, per
energy format
2
* see note 10
2
05DF
- 05E0
1504
- 1505
W-hours, Net
SINT32
-99999999
to 99999999
Wh per
energy
format
05E1
- 05E2
1506
- 1507
W-hours, Total
SINT32
0 to
99999999
Wh per
energy
format
05E3
- 05E4
1508
- 1509
VAR-hours, Positive
SINT32
0 to
99999999
VARh per
energy
format
05E5
- 05E6
1510
- 1511
VAR-hours, Negative SINT32
0 to 99999999
VARh per
energy
format
2
05E7
- 05E8
1512
- 1513
VAR-hours, Net
SINT32
-99999999
to 99999999
VARh per
energy
format
2
05E9
- 05EA
1514
- 1515
VAR-hours, Total
SINT32
0 to
99999999
VARh per
energy
format
2
05EB
- 05EC
1516
- 1517
VA-hours, Total
SINT32
0 to
99999999
VAh per
energy
format
2
05ED
- 05EE
1518
- 1519
W-hours, Received,
Phase A
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
05EF
- 05F0
1520
- 1521
W-hours, Received,
Phase B
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
05F1
- 05F2
1522
- 1523
W-hours, Received,
Phase C
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
B–30
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 5 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
05F3
- 05F4
1524
- 1525
W-hours, Delivered,
Phase A
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
05F5
- 05F6
1526
- 1527
W-hours, Delivered,
Phase B
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
05F7
- 05F8
1528
- 1529
W-hours, Delivered,
Phase C
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
05F9
- 05FA
1530
- 1531
W-hours, Net, Phase
A
SINT32
-99999999
to 99999999
Wh per
energy
format
2
05FB
- 05FC
1532
- 1533
W-hours, Net, Phase
B
SINT32
-99999999
to 99999999
Wh per
energy
format
2
05FD
- 05FE
1534
- 1535
W-hours, Net, Phase
C
SINT32
-99999999
to 99999999
Wh per
energy
format
2
05FF
- 600
1536
- 1537
W-hours, Total,
Phase A
SINT32
0 to
99999999
Wh per
energy
format
2
601
- 602
1538
- 1539
W-hours, Total,
Phase B
SINT32
0 to
99999999
Wh per
energy
format
2
603
- 604
1540
- 1541
W-hours, Total,
Phase C
SINT32
0 to
99999999
Wh per
energy
format
2
605
- 606
1542
- 1543
VAR-hours, Positive,
Phase A
SINT32
0 to
99999999
VARh per
energy
format
2
607
- 608
1544
- 1545
VAR-hours, Positive,
Phase B
SINT32
0 to
99999999
VARh per
energy
format
2
609
- 060A
1546
- 1547
VAR-hours, Positive,
Phase C
SINT32
0 to
99999999
VARh per
energy
format
2
060B
- 060C
1548
- 1549
VAR-hours,
Negative, Phase A
SINT32
0 to 99999999
VARh per
energy
format
2
060D
- 060E
1550
- 1551
VAR-hours,
Negative, Phase B
SINT32
0 to 99999999
VARh per
energy
format
2
060F
- 610
1552
- 1553
VAR-hours,
Negative, Phase C
SINT32
0 to 99999999
VARh per
energy
format
2
611
- 612
1554
- 1555
VAR-hours, Net,
Phase A
SINT32
-99999999
to 99999999
VARh per
energy
format
2
613
- 614
1556
- 1557
VAR-hours, Net,
Phase B
SINT32
-99999999
to 99999999
VARh per
energy
format
2
615
- 616
1558
- 1559
VAR-hours, Net,
Phase C
SINT32
-99999999
to 99999999
VARh per
energy
format
2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–31
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 6 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
617
- 618
1560
- 1561
VAR-hours, Total,
Phase A
SINT32
0 to
99999999
VARh per
energy
format
2
619
- 061A
1562
- 1563
VAR-hours, Total,
Phase B
SINT32
0 to
99999999
VARh per
energy
format
2
061B
- 061C
1564
- 1565
VAR-hours, Total,
Phase C
SINT32
0 to
99999999
VARh per
energy
format
2
061D
- 061E
1566
- 1567
VA-hours, Phase A
SINT32
0 to
99999999
VAh per
energy
format
2
061F
- 620
1568
- 1569
VA-hours, Phase B
SINT32
0 to
99999999
VAh per
energy
format
2
621
- 622
1570
- 1571
VA-hours, Phase C
SINT32
0 to
99999999
VAh per
energy
format
2
0623
- 0624
1572
- 1573
W-hours, Received,
rollover count
UINT32
0 to
4,294,967,29
4
0625
- 0626
1574
- 1575
W-hours, Delivered,
rollover count
UINT32
0 to
4,294,967,29
4
0627
- 0628
1576
- 1577
VAR-hours, Positive,
rollover count
UINT32
0 to
4,294,967,29
4
0629
- 062A
1578
- 1579
VAR-hours,
Negative, rollover
count
UINT32
0 to
4,294,967,29
4
062B
- 062C
1580
- 1581
VA-hours, rollover
count
UINT32
0 to
4,294,967,29
4
B–32
These registers count the number
of times their corresponding energy
accumulators have wrapped from
+max to 0. They are reset when
energy is reset.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 7 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
062D
- 062E
1582
- 1583
W-hours in the
Interval, Received
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
062F
- 0630
1584
- 1585
W-hours in the
Interval, Delivered
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
0631
- 0632
1586
- 1587
VAR-hours in the
Interval, Positive
SINT32
0 to
99999999
VARh per
energy
format
0633
- 0634
1588
- 1589
VAR-hours in the
Interval, Negative
SINT32
0 to 99999999
VARh per
energy
format
0635
- 0636
1590
- 1591
VA-hours in the
Interval, Total
SINT32
0 to
99999999
VAh per
energy
format
0637
- 0638
1592
- 1593
W-hours in the
Interval, Received,
Phase A
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
0639
- 063A
1594
- 1595
W-hours in the
Interval, Received,
Phase B
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
063B
- 063C
1596
- 1597
W-hours in the
Interval, Received,
Phase C
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
Comments
#
Reg
* Wh received & delivered always
have opposite signs
* Wh received is positive for "view
as load" , delivered is positive for
"view as generator"
* 5 to 8 digits
* decimal point implied, per energy
format
* resolution of digit before decimal
point = u
B–33
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 8 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
063D
- 063E
1598
- 1599
W-hours in the
Interval, Delivered,
Phase A
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
063F
- 640
1600
- 1601
W-hours in the
Interval, Delivered,
Phase B
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
641
- 642
1602
- 1603
W-hours in the
Interval, Delivered,
Phase C
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
643
- 644
1604
- 1605
VAR-hours in the
Interval, Positive,
Phase A
SINT32
0 to
99999999
VARh per
energy
format
645
- 646
1606
- 1607
VAR-hours in the
Interval, Positive,
Phase B
SINT32
0 to
99999999
VARh per
energy
format
647
- 648
1608
- 1609
VAR-hours in the
Interval, Positive,
Phase C
SINT32
0 to
99999999
VARh per
energy
format
649
- 064A
1610
- 1611
VAR-hours in the
Interval, Negative,
Phase A
SINT32
0 to 99999999
VARh per
energy
format
064B
- 064C
1612
- 1613
VAR-hours in the
Interval, Negative,
Phase B
SINT32
0 to 99999999
VARh per
energy
format
063D
- 064E
1614
- 1615
VAR-hours in the
Interval, Negative,
Phase C
SINT32
0 to 99999999
VARh per
energy
format
064F
- 650
1616
- 1617
VA-hours in the
Interval, Phase A
SINT32
0 to
99999999
VAh per
energy
format
651
- 652
1618
- 1619
VA-hours in the
Interval, Phase B
SINT32
0 to
99999999
VAh per
energy
format
653
- 654
1620
- 1621
VA-hours in the
Interval, Phase C
SINT32
0 to
99999999
VAh per
energy
format
Comments
Block Size:
Primary Demand Block
07CF
07D0
2000
07D1
- 07D2
07D3
#
Reg
122
read-only
2001
Amps A, Average
FLOAT
0 to 9999 M
amps
2
2002
- 2003
Amps B, Average
FLOAT
0 to 9999 M
amps
2
- 07D4
2004
- 2005
Amps C, Average
FLOAT
0 to 9999 M
amps
2
07D5
- 07D6
2006
- 2007
Positive Watts, 3-Ph,
Average
FLOAT
-9999 M to
+9999 M
watts
2
07D7
- 07D8
2008
- 2009
Positive VARs, 3-Ph,
Average
FLOAT
-9999 M to
+9999 M
VARs
2
07D9
- 07DA
2010
- 2011
Negative Watts, 3Ph, Average
FLOAT
-9999 M to
+9999 M
watts
2
07DB
- 07DC
2012
- 2013
Negative VARs, 3Ph, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07DD
- 07DE
2014
- 2015
VAs, 3-Ph, Average
FLOAT
-9999 M to
+9999 M
VAs
2
B–34
-
-
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 9 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
07DF
- 07E0
2016
- 2017
Positive PF, 3-Ph,
Average
FLOAT
-1.00 to
+1.00
none
2
07E1
- 07E2
2018
- 2019
Negative PF, 3-PF,
Average
FLOAT
-1.00 to
+1.00
none
2
07E3
- 07E4
2020
- 2021
Neutral Current,
Average
FLOAT
0 to 9999 M
amps
2
07E5
- 07E6
2022
- 2023
Positive Watts,
Phase A, Average
FLOAT
-9999 M to
+9999 M
watts
2
07E7
- 07E8
2024
- 2025
Positive Watts,
Phase B, Average
FLOAT
-9999 M to
+9999 M
watts
2
07E9
- 07EA
2026
- 2027
Positive Watts,
Phase C, Average
FLOAT
-9999 M to
+9999 M
watts
2
07EB
- 07EC
2028
- 2029
Positive VARs, Phase
A, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07ED
- 07EE
2030
- 2031
Positive VARs, Phase
B, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07EF
- 07F0
2032
- 2033
Positive VARs, Phase
C, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07F1
- 07F2
2034
- 2035
Negative Watts,
Phase A, Average
FLOAT
-9999 M to
+9999 M
watts
2
07F3
- 07F4
2036
- 2037
Negative Watts,
Phase B, Average
FLOAT
-9999 M to
+9999 M
watts
2
07F5
- 07F6
2038
- 2039
Negative Watts,
Phase C, Average
FLOAT
-9999 M to
+9999 M
watts
2
07F7
- 07F8
2040
- 2041
Negative VARs,
Phase A, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07F9
- 07FA
2042
- 2043
Negative VARs,
Phase B, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07FB
- 07FC
2044
- 2045
Negative VARs,
Phase C, Average
FLOAT
-9999 M to
+9999 M
VARs
2
07FD
- 07FE
2046
- 2047
VAs, Phase A,
Average
FLOAT
-9999 M to
+9999 M
VAs
2
07FF
- 0800
2048
- 2049
VAs, Phase B,
Average
FLOAT
-9999 M to
+9999 M
VAs
2
0801
- 0802
2050
- 2051
VAs, Phase C,
Average
FLOAT
-9999 M to
+9999 M
VAs
2
0803
- 0804
2052
- 2053
Positive PF, Phase A,
Average
FLOAT
-1.00 to
+1.00
none
2
0805
- 0806
2054
- 2055
Positive PF, Phase B,
Average
FLOAT
-1.00 to
+1.00
none
2
0807
- 0808
2056
- 2057
Positive PF, Phase C,
Average
FLOAT
-1.00 to
+1.00
none
2
0809
- 080A
2058
- 2059
Negative PF, Phase
A, Average
FLOAT
-1.00 to
+1.00
none
2
080B
- 080C
2060
- 2061
Negative PF, Phase
B, Average
FLOAT
-1.00 to
+1.00
none
2
080D
- 080E
2062
- 2063
Negative PF, Phase
C, Average
FLOAT
-1.00 to
+1.00
none
2
Block Size:
Uncompensated Readings Block
0BB7
- 0BB8
3000
- 3001
64
read-only
Watts, 3-Ph total
FLOAT
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
-9999 M to
+9999 M
watts
2
B–35
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 10 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
0BB9
- 0BBA
3002
- 3003
VARs, 3-Ph total
FLOAT
-9999 M to
+9999 M
VARs
2
0BBB
- 0BBC
3004
- 3005
VAs, 3-Ph total
FLOAT
-9999 M to
+9999 M
VAs
2
0BBD
- 0BBE
3006
- 3007
Power Factor, 3-Ph
total
FLOAT
-1.00 to
+1.00
none
2
0BBF
- 0BC0
3008
- 3009
Watts, Phase A
FLOAT
-9999 M to
+9999 M
watts
0BC1
- 0BC2
3010
- 3011
Watts, Phase B
FLOAT
-9999 M to
+9999 M
watts
0BC3
- 0BC4
3012
- 3013
Watts, Phase C
FLOAT
-9999 M to
+9999 M
watts
2
0BC5
- 0BC6
3014
- 3015
VARs, Phase A
FLOAT
-9999 M to
+9999 M
VARs
2
OBC7
- 0BC8
3016
- 3017
VARs, Phase B
FLOAT
-9999 M to
+9999 M
VARs
2
0BC9
- 0BCA
3018
- 3019
VARs, Phase C
FLOAT
-9999 M to
+9999 M
VARs
2
0BCB
- 0BCC
3020
- 3021
VAs, Phase A
FLOAT
-9999 M to
+9999 M
VAs
2
0BCD
- 0BCE
3022
- 3023
VAs, Phase B
FLOAT
-9999 M to
+9999 M
VAs
2
0BCF
- 0BD0
3024
- 3025
VAs, Phase C
FLOAT
-9999 M to
+9999 M
VAs
2
0BD1
- 0BD2
3026
- 3027
Power Factor, Phase
A
FLOAT
-1.00 to
+1.00
none
2
0BD3
- 0BD4
3028
- 3029
Power Factor, Phase
B
FLOAT
-1.00 to
+1.00
none
2
0BD5
- 0BD6
3030
- 3031
Power Factor, Phase
C
FLOAT
-1.00 to
+1.00
none
2
0BD7
- 0BD8
3032
- 3033
W-hours, Received
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
0BD9
- 0BDA
3034
- 3035
W-hours, Delivered
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
0BDB
0BDC
3036
0BDD
- 0BDE
3038
0BDF
- 0BE0
0BE1
* Wh received & delivered always
have opposite signs
* Wh received is positive for "view
as load", delivered is positive for
"view as generator"
2
2
2
2
* 5 to 8 digits
* decimal point implied, per energy
format
2
* resolution of digit before decimal
point = units, kilo, or mega, per
energy format
2
* see note 10
2
W-hours, Net
SINT32
-99999999
to 99999999
Wh per
energy
format
- 3039
W-hours, Total
SINT32
0 to
99999999
Wh per
energy
format
3040
- 3041
VAR-hours, Positive
SINT32
0 to
99999999
VARh per
energy
format
- 0BE2
3042
- 3043
VAR-hours, Negative SINT32
0 to 99999999
VARh per
energy
format
2
0BE3
- 0BE4
3044
- 3045
VAR-hours, Net
SINT32
-99999999
to 99999999
VARh per
energy
format
2
0BE5
- 0BE6
3046
- 3047
VAR-hours, Total
SINT32
0 to
99999999
VARh per
energy
format
2
B–36
-
-
3037
Per phase power and PF have
values
only for WYE hookup and will be
zero for all other hookups.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 11 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
0BE7
- 0BE8
3048
- 3049
VA-hours, Total
SINT32
0 to
99999999
VAh per
energy
format
2
0BE9
- 0BEA
3050
- 3051
W-hours, Received,
Phase A
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
0BEB
- 0BEC
3052
- 3053
W-hours, Received,
Phase B
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
0BED
- 0BEE
3054
- 3055
W-hours, Received,
Phase C
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
0BEF
- 0BF0
3056
- 3057
W-hours, Delivered,
Phase A
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
0BF1
- 0BF2
3058
- 3059
W-hours, Delivered,
Phase B
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
0BF3
- 0BF4
3060
- 3061
W-hours, Delivered,
Phase C
SINT32
0 to
99999999 or
0 to 99999999
Wh per
energy
format
2
0BF5
- 0BF6
3062
- 3063
W-hours, Net, Phase
A
SINT32
-99999999
to 99999999
Wh per
energy
format
2
0BF7
- 0BF8
3064
- 3065
W-hours, Net, Phase
B
SINT32
-99999999
to 99999999
Wh per
energy
format
2
0BF9
- 0BFA
3066
- 3067
W-hours, Net, Phase
C
SINT32
-99999999
to 99999999
Wh per
energy
format
2
0BFB
- 0BFC
3068
- 3069
W-hours, Total,
Phase A
SINT32
0 to
99999999
Wh per
energy
format
2
0BFD
- 0BFE
3070
- 3071
W-hours, Total,
Phase B
SINT32
0 to
99999999
Wh per
energy
format
2
0BFF
- 0C00
3072
- 3073
W-hours, Total,
Phase C
SINT32
0 to
99999999
Wh per
energy
format
2
0C01
- 0C02
3074
- 3075
VAR-hours, Positive,
Phase A
SINT32
0 to
99999999
VARh per
energy
format
2
0C03
- 0C04
3076
- 3077
VAR-hours, Positive,
Phase B
SINT32
0 to
99999999
VARh per
energy
format
2
0C05
- 0C06
3078
- 3079
VAR-hours, Positive,
Phase C
SINT32
0 to
99999999
VARh per
energy
format
2
0C07
- 0C08
3080
- 3081
VAR-hours,
Negative, Phase A
SINT32
0 to 99999999
VARh per
energy
format
2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–37
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 12 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
0C09
- 0C0A
3082
- 3083
VAR-hours,
Negative, Phase B
SINT32
0 to 99999999
VARh per
energy
format
2
0C0B
- 0C0C
3084
- 3085
VAR-hours,
Negative, Phase C
SINT32
0 to 99999999
VARh per
energy
format
2
0C0D
- 0C0E
3086
- 3087
VAR-hours, Net,
Phase A
SINT32
-99999999
to 99999999
VARh per
energy
format
2
0C0F
- 0C10
3088
- 3089
VAR-hours, Net,
Phase B
SINT32
-99999999
to 99999999
VARh per
energy
format
2
0C11
- 0C12
3090
- 3091
VAR-hours, Net,
Phase C
SINT32
-99999999
to 99999999
VARh per
energy
format
2
0C13
- 0C14
3092
- 3093
VAR-hours, Total,
Phase A
SINT32
0 to
99999999
VARh per
energy
format
2
0C15
- 0C16
3094
- 3095
VAR-hours, Total,
Phase B
SINT32
0 to
99999999
VARh per
energy
format
2
0C17
- 0C18
3096
- 3097
VAR-hours, Total,
Phase C
SINT32
0 to
99999999
VARh per
energy
format
2
0C19
- 0C1A
3098
- 3099
VA-hours, Phase A
SINT32
0 to
99999999
VAh per
energy
format
2
0C1B
- 0C1C
3100
- 3101
VA-hours, Phase B
SINT32
0 to
99999999
VAh per
energy
format
2
0C1D
- 0C1E
3102
- 3103
VA-hours, Phase C
SINT32
0 to
99999999
VAh per
energy
format
2
Block Size:
Phase Angle Block
1003
104
read-only
1003
4100
4100
Phase A Current
SINT16
-1800 to
+1800
0.1 degree
1
1004
- 1004
4101
- 4101
Phase B Current
SINT16
-1800 to
+1800
0.1 degree
1
1005
- 1005
4102
- 4102
Phase C Current
SINT16
-1800 to
+1800
0.1 degree
1
1006
- 1006
4103
- 4103
Angle, Volts A-B
SINT16
-1800 to
+1800
0.1 degree
1
1007
- 1007
4104
- 4104
Angle, Volts B-C
SINT16
-1800 to
+1800
0.1 degree
1
1008
- 1008
4105
- 4105
Angle, Volts C-A
SINT16
-1800 to
+1800
0.1 degree
1
-
-
Block Size:
Status Block
1193
B–38
-
1193
6
read-only
4500
-
4500
Port ID
UINT16
1 to 4
none
Identifies which EPM 7100 COM
port a master is connected to; 1 for
COM1, 2 for COM2, etc.
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 13 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
1194
- 1194
4501
- 4501
Meter Status
UINT16
bit-mapped
mmmpch-- mmm = measurement state (0=off,
tffeeccc
1=running normally, 2=limp mode,
3=warmup, 6&7=boot, others
unused) See note 16.
pch = NVMEM block OK flags
(p=profile, c=calibration, h=header),
flag is 1 if OK
t - CT PT compensation status.
(0=Disabled,1=Enabled)
ff = flash state (0=initializing,
1=logging disabled by Vswitch,
3=logging)
ee = edit state (0=startup,
1=normal, 2=privileged command
session, 3=profile update mode)
ccc = port enabled for edit(0=none,
1-4=COM1-COM4, 7=front panel)
1
1195
- 1195
4502
- 4502
Limits Status
UINT16
bit-mapped
87654321
87654321
high byte is setpt 1, 0=in, 1=out
low byte is setpt 2, 0=in, 1=out
see notes 11, 12, 17
1
1196
- 1197
4503
- 4504
Time Since Reset
UINT32
0 to
4294967294
4 msec
wraps around after max count
2
1198
- 119A
4505
- 4507
Meter On Time
TSTAMP
1Jan2000 31Dec2099
1 sec
3
119B
- 119D
4508
- 4510
Current Date and
Time
TSTAMP
1Jan2000 31Dec2099
1 sec
3
119E
- 119E
4511
- 4511
Clock Sync Status
UINT16
bit-mapped
mmmp
pppe 0000
000s
mmmp pppe = configuration per
programmable settings (see
register 30011, 0x753A)
s = status: 1=working properly,
0=not working
1
119F
- 119F
4512
- 4512
Current Day of
Week
UINT16
1 to 7
1 day
1=Sun, 2=Mon, etc.
1
Block Size:
13
Short term Primary Minimum Block
1F27
1F28
7976
1F29
- 1F2A
1F2B
read-only
7977
Volts A-N, previous
Demand interval
Short Term
Minimum
FLOAT
0 to 9999 M
volts
7978
- 7979
Volts B-N, previous
Demand interval
Short Term
Minimum
FLOAT
0 to 9999 M
volts
2
- 1F2C
7980
- 7981
Volts C-N, previous
Demand interval
Short Term
Minimum
FLOAT
0 to 9999 M
volts
2
1F2D
- 1F2E
7982
- 7983
Volts A-B, previous
Demand interval
Short Term
Minimum
FLOAT
0 to 9999 M
volts
2
1F2F
- 1F30
7984
- 7985
Volts B-C, previous
Demand interval
Short Term
Minimum
FLOAT
0 to 9999 M
volts
2
1F31
- 1F32
7986
- 7987
Volts C-A, previous
Demand interval
Short Term
Minimum
FLOAT
0 to 9999 M
volts
2
-
-
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
Minimum instantaneous value
measured during the demand
interval before the one most
recently completed.
2
B–39
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 14 of 36)
Modbus Address
Hex
1F33
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
7989
Volts A-N, Short
Term Minimum
FLOAT
0 to 9999 M
volts
Comments
1F34
7988
1F35
- 1F36
7990
- 7991
Volts B-N, Short
Term Minimum
FLOAT
0 to 9999 M
volts
1F37
- 1F38
7992
- 7993
Volts C-N, Short
Term Minimum
FLOAT
0 to 9999 M
volts
2
1F39
- 1F3A
7994
- 7995
Volts A-B, Short
Term Minimum
FLOAT
0 to 9999 M
volts
2
1F3B
- 1F3C
7996
- 7997
Volts B-C, Short
Term Minimum
FLOAT
0 to 9999 M
volts
2
1F3D
- 1F3E
7998
- 7999
Volts C-A, Short
Term Minimum
FLOAT
0 to 9999 M
volts
2
-
-
Minimum instantaneous value
measured during the most recently
completed demand interval.
#
Reg
Block Size:
Primary Minimum Block
1F3F
-
1F40
8000
2
2
24
read-only
-
8001
Volts A-N, Minimum
FLOAT
0 to 9999 M
volts
2
1F41
- 1F42
8002
- 8003
Volts B-N, Minimum
FLOAT
0 to 9999 M
volts
2
1F43
- 1F44
8004
- 8005
Volts C-N, Minimum
FLOAT
0 to 9999 M
volts
2
1F45
- 1F46
8006
- 8007
Volts A-B, Minimum
FLOAT
0 to 9999 M
volts
2
1F47
- 1F48
8008
- 8009
Volts B-C, Minimum
FLOAT
0 to 9999 M
volts
2
1F49
- 1F4A
8010
- 8011
Volts C-A, Minimum
FLOAT
0 to 9999 M
volts
2
1F4B
- 1F4C
8012
- 8013
Amps A, Minimum
Avg Demand
FLOAT
0 to 9999 M
amps
2
1F4D
- 1F4E
8014
- 8015
Amps B, Minimum
Avg Demand
FLOAT
0 to 9999 M
amps
2
1F4F
- 1F50
8016
- 8017
Amps C, Minimum
Avg Demand
FLOAT
0 to 9999 M
amps
2
1F51
- 1F52
8018
- 8019
Positive Watts, 3-Ph,
Minimum Avg
Demand
FLOAT
0 to +9999 M
watts
2
1F53
- 1F54
8020
- 8021
Positive VARs, 3-Ph,
Minimum Avg
Demand
FLOAT
0 to +9999 M
VARs
2
1F55
- 1F56
8022
- 8023
Negative Watts, 3Ph, Minimum Avg
Demand
FLOAT
0 to +9999 M
watts
2
1F57
- 1F58
8024
- 8025
Negative VARs, 3Ph, Minimum Avg
Demand
FLOAT
0 to +9999 M
VARs
2
1F59
- 1F5A
8026
- 8027
VAs, 3-Ph, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
VAs
2
1F5B
- 1F5C
8028
- 8029
Positive Power
Factor, 3-Ph,
Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F5D
- 1F5E
8030
- 8031
Negative Power
Factor, 3-Ph,
Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F5F
- 1F60
8032
- 8033
Frequency,
Minimum
FLOAT
0 to 65.00
Hz
2
B–40
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 15 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
1F61
- 1F62
8034
- 8035
Neutral Current,
Minimum Avg
Demand
FLOAT
0 to 9999 M
amps
2
1F63
- 1F64
8036
- 8037
Positive Watts,
Phase A, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
1F65
- 1F66
8038
- 8039
Positive Watts,
Phase B, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
1F67
- 1F68
8040
- 8041
Positive Watts,
Phase C, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
1F69
- 1F6A
8042
- 8043
Positive VARs, Phase
A, Minimum Avg
Demand
FLOAT
-9999 M to
+9999 M
VARs
2
1F6B
- 1F6C
8044
- 8045
Positive VARs, Phase
B, Minimum Avg
Demand
FLOAT
-9999 M to
+9999 M
VARs
2
1F6D
- 1F6E
8046
- 8047
Positive VARs, Phase
C, Minimum Avg
Demand
FLOAT
-9999 M to
+9999 M
VARs
2
1F6F
- 1F70
8048
- 8049
Negative Watts,
Phase A, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
1F71
- 1F72
8050
- 8051
Negative Watts,
Phase B, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
1F73
- 1F74
8052
- 8053
Negative Watts,
Phase C, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
1F75
- 1F76
8054
- 8055
Negative VARs,
Phase A, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
VARs
2
1F77
- 1F78
8056
- 8057
Negative VARs,
Phase B, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
VARs
2
1F79
- 1F7A
8058
- 8059
Negative VARs,
Phase C, Minimum
Avg Demand
FLOAT
-9999 M to
+9999 M
VARs
2
1F7B
- 1F7C
8060
- 8061
VAs, Phase A,
Minimum Avg
Demand
FLOAT
-9999 M to
+9999 M
VAs
2
1F7D
- 1F7E
8062
- 8063
VAs, Phase B,
Minimum Avg
Demand
FLOAT
-9999 M to
+9999 M
VAs
2
1F7F
- 1F80
8064
- 8065
VAs, Phase C,
Minimum Avg
Demand
FLOAT
-9999 M to
+9999 M
VAs
2
1F81
- 1F82
8066
- 8067
Positive PF, Phase A,
Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F83
- 1F84
8068
- 8069
Positive PF, Phase B,
Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F85
- 1F86
8070
- 8071
Positive PF, Phase C,
Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–41
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 16 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
1F87
- 1F88
8072
- 8073
Negative PF, Phase
A, Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F89
- 1F8A
8074
- 8075
Negative PF, Phase
B, Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F8B
- 1F8C
8076
- 8077
Negative PF, Phase
C, Minimum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
1F8D
- 1F8D
8078
- 8078
Reserved
1
1F8E
- 1F8E
8079
- 8079
Reserved
1
1F8F
- 1F8F
8080
- 8080
Reserved
1
1F90
- 1F90
8081
- 8081
Reserved
1
1F91
- 1F91
8082
- 8082
Reserved
1
1F92
- 1F92
8083
- 8083
Reserved
1
1F93
- 1F94
8084
- 8085
Symmetrical
Component
Magnitude, 0 Seq,
Minimum
FLOAT
0 to 9999 M
volts
2
1F95
- 1F96
8086
- 8087
Symmetrical
Component
Magnitude, + Seq,
Minimum
FLOAT
0 to 9999 M
volts
2
1F97
- 1F98
8088
- 8089
Symmetrical
Component
Magnitude, - Seq,
Minimum
FLOAT
0 to 9999 M
volts
2
1F99
- 1F99
8090
- 8090
Symmetrical
Component Phase,
0 Seq, Minimum
SINT16
-1800 to
+1800
0.1 degree
1
1F9A
- 1F9A
8091
- 8091
Symmetrical
Component Phase,
+ Seq, Minimum
SINT16
-1800 to
+1800
0.1 degree
1
1F9B
- 1F9B
8092
- 8092
Symmetrical
Component Phase, Seq, Minimum
SINT16
-1800 to
+1800
0.1 degree
1
1F9C
- 1F9C
8093
- 8093
Unbalance, 0
sequence, Minimum
UINT16
0 to 10000
0.01%
1
1F9D
- 1F9D
8094
- 8094
Unbalance, sequence, Minimum
UINT16
0 to 10000
0.01%
1
1F9E
- 1F9E
8095
- 8095
Current Unbalance,
Minimum
UINT16
0 to 20000
0.01%
1
Block Size:
Primary Minimum Timestamp Block
20CF
20D1
8400
20D2
- 20D4
20D5
20D8
B–42
96
read-only
8402
Volts A-N, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
8403
- 8405
Volts B-N, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
- 20D7
8406
- 8408
Volts C-N, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
- 20DA
8409
- 8411
Volts A-B, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
-
-
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 17 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
20DB
- 20DD
8412
- 8414
Volts B-C, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20DE
- 2.00E
+01
8415
- 8417
Volts C-A, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2.00E
+02
- 2.00E
+04
8418
- 8420
Amps A, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2.00E
+05
- 2.00E
+07
8421
- 8423
Amps B, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2.00E
+08
- 2.00E
+10
8424
- 8426
Amps C, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20EA
- 20EC
8427
- 8429
Positive Watts, 3-Ph,
Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20ED
- 20EF
8430
- 8432
Positive VARs, 3-Ph,
Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20F0
- 20F2
8433
- 8435
Negative Watts, 3Ph, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20F3
- 20F5
8436
- 8438
Negative VARs, 3Ph, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20F6
- 20F8
8439
- 8441
VAs, 3-Ph, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20F9
- 20FB
8442
- 8444
Positive Power
Factor, 3-Ph, Min
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20FC
- 20FE
8445
- 8447
Negative Power
Factor, 3-Ph, Min
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
20FF
- 2101
8448
- 8450
Frequency, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2102
- 2104
8451
- 8453
Neutral Current, Min
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2100
1 sec
3
2105
- 2107
8454
- 8456
Positive Watts,
Phase A, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2108
- 210A
8457
- 8459
Positive Watts,
Phase B, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
210B
- 210D
8460
- 8462
Positive Watts,
Phase C, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
210E
- 2110
8463
- 8465
Positive VARs, Phase
A, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2111
- 2113
8466
- 8468
Positive VARs, Phase
B, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2114
- 2116
8469
- 8471
Positive VARs, Phase
C, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2117
- 2119
8472
- 8474
Negative Watts,
Phase A, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–43
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 18 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
211A
- 211C
8475
- 8477
Negative Watts,
Phase B, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
211D
- 211F
8478
- 8480
Negative Watts,
Phase C, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2120
- 2122
8481
- 8483
Negative VARs,
Phase A, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2123
- 2125
8484
- 8486
Negative VARs,
Phase B, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2126
- 2128
8487
- 8489
Negative VARs,
Phase C, Min Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2129
- 212B
8490
- 8492
VAs, Phase A, Min
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
212C
- 212E
8493
- 8495
VAs, Phase B, Min
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
212F
- 2131
8496
- 8498
VAs, Phase C, Min
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2132
- 2134
8499
- 8501
Positive PF, Phase A,
Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2135
- 2137
8502
- 8504
Positive PF, Phase B,
Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2138
- 213A
8505
- 8507
Positive PF, Phase C,
Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
213B
- 213D
8508
- 8510
Negative PF, Phase
A, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
213E
- 2140
8511
- 8513
Negative PF, Phase
B, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2141
- 2143
8514
- 8516
Negative PF, Phase
C, Min Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2144
- 2146
8517
- 8519
Reserved
2147
- 2149
8520
- 8522
Reserved
3
214A
- 214C
8523
- 8525
Reserved
3
214D
- 214F
8526
- 8528
Reserved
3
2150
- 2152
8529
- 8531
Reserved
3
2153
- 2155
8532
- 8534
Reserved
3
2156
- 2158
8535
- 8537
Symmetrical Comp
Magnitude, 0 Seq,
Min Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2159
- 215B
8538
- 8540
Symmetrical Comp
Magnitude, + Seq,
Min Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
B–44
3
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 19 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
215C
- 215E
8541
- 8543
Symmetrical Comp
Magnitude, - Seq,
Min Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
215F
- 2161
8544
- 8546
Symmetrical Comp
Phase, 0 Seq, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2162
- 2164
8547
- 8549
Symmetrical Comp
Phase, + Seq, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2165
- 2167
8550
- 8552
Symmetrical Comp
Phase, - Seq, Min
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2168
- 2170
8553
- 8555
Unbalance, 0 Seq,
Min Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2171
- 2173
8556
- 8558
Unbalance, - Seq,
Min Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2174
- 2176
8559
- 8561
Current Unbalance,
Min Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
Block Size:
Short term Primary Maximum Block
230F
2310
8976
2311
- 2312
2313
162
read-only
8977
Volts A-N, previous
Demand interval
Short Term
Maximum
FLOAT
0 to 9999 M
volts
8978
- 8979
Volts B-N, previous
Demand interval
Short Term
Maximum
FLOAT
0 to 9999 M
volts
- 2314
8980
- 8981
Volts C-N, previous
Demand interval
Short Term
Maximum
FLOAT
0 to 9999 M
volts
2315
- 2316
8982
- 8983
Volts A-B, previous
Demand interval
Short Term
Maximum
FLOAT
0 to 9999 M
volts
2317
- 2318
8984
- 8985
Volts B-C, previous
Demand interval
Short Term
Maximum
FLOAT
0 to 9999 M
volts
2319
- 231A
8986
- 8987
Volts C-A, previous
Demand interval
Short Term
Maximum
FLOAT
0 to 9999 M
volts
231C
8988
8989
Volts A-N, Maximum
FLOAT
0 to 9999 M
volts
231D
- 231E
8990
- 8991
Volts B-N, Maximum
FLOAT
0 to 9999 M
volts
232F
- 2320
8992
- 8993
Volts C-N, Maximum
FLOAT
0 to 9999 M
volts
2
2321
- 2322
8994
- 8995
Volts A-B, Maximum
FLOAT
0 to 9999 M
volts
2
2323
- 2324
8996
- 8997
Volts B-C, Maximum
FLOAT
0 to 9999 M
volts
2
2325
- 2326
8998
- 8999
Volts C-A, Maximum
FLOAT
0 to 9999 M
volts
231B
-
-
-
-
Maximum instantaneous value
measured during the demand
interval before the one most
recently completed.
Maximum instantaneous value
measured during the most recently
completed demand interval.
2
2
Block Size:
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
2
12
B–45
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 20 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Primary Maximum Block
2327
2328
9000
2329
- 232A
232B
- 232C
-
Comments
#
Reg
read-only
9001
Volts A-N, Maximum
FLOAT
0 to 9999 M
volts
2
9002
- 9003
Volts B-N, Maximum
FLOAT
0 to 9999 M
volts
2
9004
- 9005
Volts C-N, Maximum
FLOAT
0 to 9999 M
volts
2
-
232D
- 232E
9006
- 9007
Volts A-B, Maximum
FLOAT
0 to 9999 M
volts
2
232F
- 2330
9008
- 9009
Volts B-C, Maximum
FLOAT
0 to 9999 M
volts
2
2331
- 2332
9010
- 9011
Volts C-A, Maximum
FLOAT
0 to 9999 M
volts
2
2333
- 2334
9012
- 9013
Amps A, Maximum
Avg Demand
FLOAT
0 to 9999 M
amps
2
2335
- 2336
9014
- 9015
Amps B, Maximum
Avg Demand
FLOAT
0 to 9999 M
amps
2
2337
- 2338
9016
- 9017
Amps C, Maximum
Avg Demand
FLOAT
0 to 9999 M
amps
2
2339
- 233A
9018
- 9019
Positive Watts, 3-Ph,
Maximum Avg
Demand
FLOAT
0 to +9999 M
watts
2
233B
- 233C
9020
- 9021
Positive VARs, 3-Ph,
Maximum Avg
Demand
FLOAT
0 to +9999 M
VARs
2
233D
- 233E
9022
- 9023
Negative Watts, 3Ph, Maximum Avg
Demand
FLOAT
0 to +9999 M
watts
2
233F
- 2340
9024
- 9025
Negative VARs, 3Ph, Maximum Avg
Demand
FLOAT
0 to +9999 M
VARs
2
2341
- 2342
9026
- 9027
VAs, 3-Ph, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
VAs
2
2343
- 2344
9028
- 9029
Positive Power
Factor, 3-Ph,
Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
2345
- 2346
9030
- 9031
Negative Power
Factor, 3-Ph,
Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
2347
- 2348
9032
- 9033
Frequency,
Maximum
FLOAT
0 to 65.00
Hz
2
2349
- 234A
9034
- 9035
Neutral Current,
Maximum Avg
Demand
FLOAT
0 to 9999 M
amps
2
234B
- 234C
9036
- 9037
Positive Watts,
Phase A, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
234D
- 234E
9038
- 9039
Positive Watts,
Phase B, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
234F
- 2350
9040
- 9041
Positive Watts,
Phase C, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
2351
- 2352
9042
- 9043
Positive VARs, Phase
A, Maximum Avg
Demand
FLOAT
-9999 M to
+9999 M
VARs
2
B–46
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 21 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
2353
- 2354
9044
- 9045
Positive VARs, Phase
B, Maximum Avg
Demand
FLOAT
-9999 M to
+9999 M
VARs
2
2355
- 2356
9046
- 9047
Positive VARs, Phase
C, Maximum Avg
Demand
FLOAT
-9999 M to
+9999 M
VARs
2
2357
- 2358
9048
- 9049
Negative Watts,
Phase A, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
2359
- 235A
9050
- 9051
Negative Watts,
Phase B, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
235B
- 235C
9052
- 9053
Negative Watts,
Phase C, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
watts
2
235D
- 235E
9054
- 9055
Negative VARs,
Phase A, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
VARs
2
235F
- 2360
9056
- 9057
Negative VARs,
Phase B, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
VARs
2
2361
- 2362
9058
- 9059
Negative VARs,
Phase C, Maximum
Avg Demand
FLOAT
-9999 M to
+9999 M
VARs
2
2363
- 2364
9060
- 9061
VAs, Phase A,
Maximum Avg
Demand
FLOAT
-9999 M to
+9999 M
VAs
2
2365
- 2366
9062
- 9063
VAs, Phase B,
Maximum Avg
Demand
FLOAT
-9999 M to
+9999 M
VAs
2
2367
- 2368
9064
- 9065
VAs, Phase C,
Maximum Avg
Demand
FLOAT
-9999 M to
+9999 M
VAs
2
2369
- 236A
9066
- 9067
Positive PF, Phase A,
Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
236B
- 236C
9068
- 9069
Positive PF, Phase B,
Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
236D
- 236E
9070
- 9071
Positive PF, Phase C,
Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
236F
- 2370
9072
- 9073
Negative PF, Phase
A, Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
2371
- 2372
9074
- 9075
Negative PF, Phase
B, Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
2373
- 2374
9076
- 9077
Negative PF, Phase
C, Maximum Avg
Demand
FLOAT
-1.00 to
+1.00
none
2
2375
- 2375
9078
- 9078
Reserved
1
2376
- 2376
9079
- 9079
Reserved
1
2377
- 2377
9080
- 9080
Reserved
1
2378
- 2378
9081
- 9081
Reserved
1
2379
- 2379
9082
- 9082
Reserved
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–47
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 22 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
237A
- 237A
9083
- 9083
Reserved
1
237B
- 237C
9084
- 9085
Symmetrical
Component
Magnitude, 0 Seq,
Maximum
FLOAT
0 to 9999 M
volts
2
237D
- 237E
9086
- 9087
Symmetrical
Component
Magnitude, + Seq,
Maximum
FLOAT
0 to 9999 M
volts
2
237F
- 2380
9088
- 9089
Symmetrical
Component
Magnitude, - Seq,
Maximum
FLOAT
0 to 9999 M
volts
2
2381
- 2381
9090
- 9090
Symmetrical
Component Phase,
0 Seq, Maximum
SINT16
-1800 to
+1800
0.1 degree
1
2382
- 2382
9091
- 9091
Symmetrical
Component Phase,
+ Seq, Maximum
SINT16
-1800 to
+1800
0.1 degree
1
2383
- 2383
9092
- 9092
Symmetrical
Component Phase, Seq, Maximum
SINT16
-1800 to
+1800
0.1 degree
1
2384
- 2384
9093
- 9093
Unbalance, 0 Seq,
Maximum
UINT16
0 to 10000
0.01%
1
2385
- 2385
9094
- 9094
Unbalance, - Seq,
Maximum
UINT16
0 to 10000
0.01%
1
2386
- 2386
9095
- 9095
Current Unbalance,
Maximum
UINT16
0 to 20000
0.01%
1
Block Size:
Primary Maximum Timestamp Block
24B7
24B9
9400
24BA
- 24BC
24BD
96
read-only
9402
Volts A-N, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
9403
- 9405
Volts B-N, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
- 24BF
9406
- 9408
Volts C-N, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24C0
- 24C2
9409
- 9411
Volts A-B, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24C3
- 24C5
9412
- 9414
Volts B-C, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24C6
- 24C8
9415
- 9417
Volts C-A, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24C9
- 24CB
9418
- 9420
Amps A, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24CC
- 24CE
9421
- 9423
Amps B, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24CF
- 24D1
9424
- 9426
Amps C, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24D2
- 24D4
9427
- 9429
Positive Watts, 3-Ph,
Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24D5
- 24D7
9430
- 9432
Positive VARs, 3-Ph,
Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
B–48
-
-
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 23 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
24D8
- 24DA
9433
- 9435
Negative Watts, 3Ph, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24DB
- 24DD
9436
- 9438
Negative VARs, 3Ph, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24DE
- 2.40E
+01
9439
- 9441
VAs, 3-Ph, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2.40E
+02
- 2.40E
+04
9442
- 9444
Positive Power
Factor, 3-Ph, Max
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2.40E
+05
- 2.40E
+07
9445
- 9447
Negative Power
Factor, 3-Ph, Max
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2.40E
+08
- 2.40E
+10
9448
- 9450
Frequency, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24EA
- 24EC
9451
- 9453
Neutral Current,
Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2100
1 sec
3
24ED
- 24EF
9454
- 9456
Positive Watts,
Phase A, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24F0
- 24F2
9457
- 9459
Positive Watts,
Phase B, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24F3
- 24F5
9460
- 9462
Positive Watts,
Phase C, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24F6
- 24F8
9463
- 9465
Positive VARs, Phase
A, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24F9
- 24FB
9466
- 9468
Positive VARs, Phase
B, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24FC
- 24FE
9469
- 9471
Positive VARs, Phase
C, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
24FF
- 2501
9472
- 9474
Negative Watts,
Phase A, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2502
- 2504
9475
- 9477
Negative Watts,
Phase B, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2505
- 2507
9478
- 9480
Negative Watts,
Phase C, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2508
- 250A
9481
- 9483
Negative VARs,
Phase A, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
250B
- 250D
9484
- 9486
Negative VARs,
Phase B, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
250E
- 2510
9487
- 9489
Negative VARs,
Phase C, Max Avg
Dmd Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–49
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 24 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
2511
- 2513
9490
- 9492
VAs, Phase A, Max
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2514
- 2516
9493
- 9495
VAs, Phase B, Max
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2517
- 2519
9496
- 9498
VAs, Phase C, Max
Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
251A
- 251C
9499
- 9501
Positive PF, Phase A,
Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
251D
- 251F
9502
- 9504
Positive PF, Phase B,
Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2520
- 2522
9505
- 9507
Positive PF, Phase C,
Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2523
- 2525
9508
- 9510
Negative PF, Phase
A, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2526
- 2528
9511
- 9513
Negative PF, Phase
B, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2529
- 252B
9514
- 9516
Negative PF, Phase
C, Max Avg Dmd
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
252C
- 252E
9517
- 9519
Reserved
3
252F
- 2531
9520
- 9522
Reserved
3
2532
- 2534
9523
- 9525
Reserved
3
2535
- 2537
9526
- 9528
Reserved
3
2538
- 253A
9529
- 9531
Reserved
3
253B
- 253D
9532
- 9534
Reserved
3
253E
- 2540
9535
- 9537
Symmetrical Comp
Magnitude, 0 Seq,
Max Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2541
- 2543
9538
- 9540
Symmetrical Comp
Magnitude, + Seq,
Max Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2544
- 2546
9541
- 9543
Symmetrical Comp
Magnitude, - Seq,
Max Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2547
- 2549
9544
- 9546
Symmetrical Comp
Phase, 0 Seq, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
254A
- 254C
9547
- 9549
Symmetrical Comp
Phase, + Seq, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
254D
- 254F
9550
- 9552
Symmetrical Comp
Phase, - Seq, Max
Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2550
- 2552
9553
- 9555
Unbalance, 0 Seq,
Max Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
2553
- 2555
9556
- 9558
Unbalance, - Seq,
Max Timestamp
TSTAMP
1Jan2000 31Dec2099
1 sec
3
B–50
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 25 of 36)
Modbus Address
Hex
2556
Decimal
- 2558
9559
- 9561
Description (Note 1)
Format
Current Unbalance,
Max Timestamp
TSTAMP
Range
(Note 6)
1Jan2000 31Dec2099
Units or
Resolution
Comments
#
Reg
1 sec
3
Block Size:
159
Commands Section (Note 4)
Resets Block (Note 9)
4E1F
write-only
4E1F
2000
0
2000
- 0
Reset Max/Min
Blocks
UINT16
password
(Note 5)
1
4.00E
+20
- 4.00E
+20
2000
1
- 2000
1
Reset Energy
Accumulators
UINT16
password
(Note 5)
1
4.00E
+21
- 4.00E
+21
2000
2
- 2000
2
Reset Alarm Log
(Note 21)
UINT16
password
(Note 5)
4.00E
+22
- 4.00E
+22
2000
3
- 2000
3
Reset System Log
(Note 21)
UINT16
password
(Note 5)
4.00E
+23
- 4.00E
+23
2000
4
- 2000
4
Reset Historical Log
1 (Note 21)
UINT16
password
(Note 5)
1
4.00E
+24
- 4.00E
+24
2000
5
- 2000
5
Reset Historical Log
2 (Note 21)
UINT16
password
(Note 5)
1
4.00E
+25
- 4.00E
+25
2000
6
- 2000
6
Reset Historical Log
3 (Note 21)
UINT16
password
(Note 5)
1
4.00E
+26
- 4.00E
+26
2000
7
- 2000
7
Reserved
4.00E
+27
- 4E2E
2000
8
- 2001
5
Reserved
Set to 0.
2
4.00E
+29
- 4E2A
2001
0
- 2001
1
Reserved
Reserved
2
4E2B
- 4E2B
2001
2
- 2001
2
Reserved
1
4E2C
- 4E2C
2001
3
- 2001
3
Reserved
1
4E2D
- 4E2D
2001
4
- 2001
4
Reserved
1
4E2E
- 4E2E
2001
5
- 2001
5
Reserved
1
-
Reply to a reset log command
indicates that the command was
accepted but not necessarily that
the reset is finished. Poll log status
block to determine this.
1
1
Block Size:
Privileged Commands Block
5207
1
16
conditional write
5207
2100
0
2100
- 0
Initiate Meter
Firmware
Reprogramming
UINT16
password
(Note 5)
5208
- 5208
2100
1
- 2100
1
Force Meter Restart
UINT16
password
(Note 5)
causes a watchdog reset, always
reads 0
1
5209
- 5209
2100
2
- 2100
2
Open Privileged
Command Session
UINT16
password
(Note 5)
meter will process command
registers (this register through
'Close Privileged Command Session'
register below) for 5 minutes or
until the session is closed,
whichever comes first.
1
520A
- 520A
2100
3
- 2100
3
Initiate
Programmable
Settings Update
UINT16
password
(Note 5)
meter enters PS update mode
1
-
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
1
B–51
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 26 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
520B
- 520B
2100
4
- 2100
4
Calculate
Programmable
Settings Checksum
(Note 3)
UINT16
0000 to 9999
meter calculates checksum on RAM
copy of PS block
1
520C
- 520C
2100
5
- 2100
5
Programmable
Settings Checksum
(Note 3)
UINT16
0000 to 9999
read/write checksum register; PS
block saved in nonvolatile memory
on write (Note 8)
1
520D
- 520D
2100
6
- 2100
6
Write New
Password (Note 3)
UINT16
0000 to 9999
write-only register; always reads
zero
1
520E
- 520E
2100
7
- 2100
7
Terminate
Programmable
Settings Update
(Note 3)
UINT16
any value
meter leaves PS update mode via
reset
1
520F
- 5211
2100
8
- 2101
0
Set Meter Clock
TSTAMP
1Jan2000 31Dec2099
saved only when 3rd register is
written
3
5212
- 5212
2101
1
- 2101
1
Reserved
Reserved
1
5213
- 5219
2101
2
- 2101
8
Reserved
Reserved
7
521A
- 521A
2101
9
- 2101
9
Close Privileged
Command Session
ends an open command session
1
Block Size:
20
UINT16
1 sec
any value
Encryption Block
658F
-
659A
read/write
2600
0
2601
- 1
Perform a Secure
Operation
UINT16
encrypted command to read
password or change meter type
12
Block Size:
12
Programmable Settings Section
Basic Setups Block
752F
write only in PS update mode
752F
3000
0
3000
- 0
CT multiplier &
denominator
UINT16
bit-mapped
dddddddd
mmmmm
mmm
7530
- 7530
3000
1
- 3000
1
CT numerator
UINT16
1 to 9999
none
1
7531
- 7531
3000
2
- 3000
2
PT numerator
UINT16
1 to 9999
none
1
7532
- 7532
3000
3
- 3000
3
PT denominator
UINT16
1 to 9999
none
1
7533
- 7533
3000
4
- 3000
4
PT multiplier &
hookup
UINT16
bit-mapped
mmmmm
mmm
mmmmhh
hh
mm?mm = PT multiplier (1, 10, 100,
or 1000)
hhhh = hookup enumeration (0 = 3
element wye[9S], 1 = delta 2
CTs[5S], 3 = 2.5 element wye[6S])
1
7534
- 7534
3000
5
- 3000
5
Averaging Method
UINT16
bit-mapped
--iiiiii b---sss
iiiiii = interval (5,15,30,60)
b = 0-block or 1-rolling
sss = # subintervals (1,2,3,4)
1
B–52
-
high byte is denominator (1 or 5,
read-only),
low byte is multiplier (1, 10, or 100)
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 27 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
7535
- 7535
3000
6
- 3000
6
Power & Energy
Format
UINT16
bit-mapped
ppppiinn
feee-ddd
pppp = power scale (0-unit, 3-kilo,
1
6-mega, 8-auto)
ii = power digits after decimal point
(0-3),
applies only if f=1 and pppp is
not auto
nn = number of energy digits (5-8 -> 0-3)
eee = energy scale (0-unit, 3-kilo, 6mega)
f = decimal point for power
(0=data-dependant placement,
1=fixed placement per ii value)
ddd = energy digits after decimal
point (0-6)
See note 10.
7536
- 7536
3000
7
- 3000
7
Operating Mode
Screen Enables
UINT16
bit-mapped
-------x
eeeeeeee
eeeeeeee = op mode screen rows
on/off, rows top to bottom are bits
low order to high order
x = set to suppress PF on W/VAR/PF
screens
7537
- 7537
3000
8
- 3000
8
Daylight Saving On
Rule
UINT16
bit-mapped
hhhhhww
wdddmmm
m
applies only if daylight savings in
1
User Settings Flags = on; specifies
when to make changeover
hhhhh = hour, 0-23
www = week, 1-4 for 1st - 4th, 5 for
last
ddd = day of week, 1-7 for Sun - Sat
mmmm = month, 1-12
Example: 2AM on the 4th Sunday of
March
hhhhh=2, www=4, ddd=1,
mmmm=3
7538
- 7538
3000
9
- 3000
9
Daylight Saving Off
Rule
UINT16
bit-mapped
hhhhhww
wdddmmm
m
1
7539
- 7539
3001
0
- 3001
0
Time Zone UTC
offset
UINT16
bit-mapped
z000 0000
hhhh
hhmm
mm = minutes/15; 00=00, 01=15,
10=30, 11=45
hhhh = hours; -23 to +23
z = Time Zone valid (0=no, 1=yes)
i.e. register=0 indicates that time
zone is not set while
register=0x8000 indicates UTC
offset = 0
1
753A
- 753A
3001
1
- 3001
1
Clock Sync
Configuration
UINT16
bit-mapped
0000 0000
mmm0
0ppe
e=enable automatic clock sync
(0=no, 1=yes
Line pppp
= expected frequency (0=60 Hz,
1=50 Hz)
1
753B
- 753B
3001
2
- 3001
2
Reserved
Reserved
1
753C
- 753C
3001
3
- 3001
3
User Settings 2
s = display secondary volts (1=yes,
0=no)
1
UINT16
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
bit-mapped
-------- ------s
1
B–53
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 28 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
753D
- 753D
3001
4
- 3001
4
DNP Options
UINT16
bit-mapped
-------ww-i-vvp
p selects primary or secondary
values for DNP voltage, current and
power registers
(0=secondary, 1=primary)
vv sets divisor for voltage scaling
(0=1, 1=10, 2=100)
i sets divisor for current scaling
(0=1, 1=10)
ww sets divisor for power scaling in
addition to scaling for Kilo
(0=1, 1=10, 2=100, 3=1000)
Example:
120KV, 500A, 180MW
p=1, vv=2, i=0, and ww=3
voltage reads 1200, current reads
500, watts reads 180
1
753E
- 753E
3001
5
- 3001
5
User Settings Flags
UINT16
bit-mapped
vvkgeinn
srpdywfa
vv = number of digits after decimal
point for voltage display.
0 - For voltage range (0 - 9999V)
1 - For voltage range (100.0kV 999.9 kV)
2 - For voltage range (10.00kV 99.99 kV)
3 - For voltage range ( 0kV 9.999 kV)
This setting is used only when
k=1.
k = enable fixed scale for voltage
display.
(0=autoscale, 1=unit if vv=0 and
kV if vv=1,2,3 )
g = enable alternate full scale bar
graph current
(1=on, 0=off)
e = enable ct pt compensation
(0=Disabled, 1=Enabled).
i = fixed scale and format current
display
0=normal autoscaled current
display
1=always show amps with no
decimal places
nn = number of phases for voltage
& current screen
(3=ABC, 2=AB, 1=A, 0=ABC)
s = scroll (1=on, 0=off)
r = password for reset in use (1=on,
0=off)
p = password for configuration in
use (1=on, 0=off)
d = daylight saving time changes
(0=off, 1=on)
y = diagnostic events in system log
(1=yes, 0=no)
w = power direction
(0=view as load, 1=view as
generator)
f = flip power factor sign (1=yes,
0=no)
a = apparent power computation
method
(0=arithmetic sum, 1=vector
sum)
1
753F
- 753F
3001
6
- 3001
6
Full Scale Current
(for load % bar
graph)
UINT16
0 to 9999
none
If non-zero and user settings bit g is
set, this value replaces CT
numerator in the full scale current
calculation. (See Note 12)
1
B–54
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 29 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
7540
- 7547
3001
7
- 3002
4
Meter Designation
ASCII
16 char
none
8
7548
- 7548
3002
5
- 3002
5
COM1 setup
UINT16
bit-mapped
----dddd 0100110
7549
- 7549
3002
6
- 3002
6
COM2 setup
UINT16
bit-mapped
----dddd ppp-bbb
1
754A
- 754A
3002
7
- 3002
7
COM2 address
UINT16
1 to 247
none
1
754B
- 754B
3002
8
- 3002
8
Limit #1 Identifier
UINT16
0 to 65535
754C
- 754C
3002
9
- 3002
9
Limit #1 Out High
Setpoint
SINT16
-200.0 to
+200.0
754D
- 754D
3003
0
- 3003
0
Limit #1 In High
Threshold
SINT16
754E
- 754E
3003
1
- 3003
1
Limit #1 Out Low
Setpoint
754F
- 754F
3003
2
- 3003
2
7550
- 7554
3003
3
7555
- 7559
755A
yy = parity (0-none, 1-odd, 2-even)
dddd = reply delay (* 50 msec)
ppp = protocol (1-Modbus RTU, 2Modbus ASCII, 3-DNP)
bbbb = baud rate (1-9600, 2-19200,
4-38400, 6-57600, 13=1200,
14=2400, 15=4800)
1
use Modbus address as the
identifier (see notes 7, 11, 12)
1
0.1% of full
scale
Setpoint for the "above" limit (LM1),
see notes 11-12.
1
-200.0 to
+200.0
0.1% of full
scale
Threshold at which "above" limit
clears; normally less than or equal
to the "above" setpoint; see notes
11-12.
1
SINT16
-200.0 to
+200.0
0.1% of full
scale
Setpoint for the "below" limit (LM2),
see notes 11-12.
1
Limit #1 In Low
Threshold
SINT16
-200.0 to
+200.0
0.1% of full
scale
Threshold at which "below" limit
clears; normally greater than or
equal to the "below" setpoint; see
notes 11-12.
1
- 3003
7
Limit #2
SINT16
same as
Limit #1
same as
Limit #1
same as Limit #1
5
3003
8
- 3004
2
Limit #3
SINT16
5
- 755E
3004
3
- 3004
7
Limit #4
SINT16
5
755F
- 7563
3004
8
- 3005
2
Limit #5
SINT16
5
7564
- 7568
3005
3
- 3005
7
Limit #6
SINT16
5
7569
- 756D
3005
8
- 3006
2
Limit #7
SINT16
5
756E
- 7572
3006
3
- 3006
7
Limit #8
SINT16
5
7573
- 7582
3006
8
- 3008
3
Reserved
Reserved
16
7583
- 75C2
3008
4
- 3014
7
Reserved
Reserved
64
75C3
- 75C3
3014
8
- 3014
8
watts loss due to
iron when watts
positive
UINT16
0 to 99.99
0.01%
1
75C4
- 75C4
3014
9
- 3014
9
watts loss due to
copper when watts
positive
UINT16
0 to 99.99
0.01%
1
75C5
- 75C5
3015
0
- 3015
0
var loss due to iron
when watts positive
UINT16
0 to 99.99
0.01%
1
75C6
- 75C6
3015
1
- 3015
1
var loss due to
copper when watts
positive
UINT16
0 to 99.99
0.01%
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–55
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 30 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
75C7
- 75C3
3015
2
- 3015
2
watts loss due to
iron when watts
negative
UINT16
0 to 99.99
0.01%
1
75C8
- 75C4
8
3015
3
- 3015
3
watts loss due to
copper when watts
negative
UINT16
0 to 99.99
0.01%
1
75C9
- 75C9
3015
4
- 3015
4
var loss due to iron
when watts
negative
UINT16
0 to 99.99
0.01%
1
75CA
- 75CA
3015
5
- 3015
5
var loss due to
copper when watts
negative
UINT16
0 to 99.99
0.01%
1
75CB
- 75CB
3015
6
- 3015
6
transformer loss
compensation user
settings flag
UINT16
bit-mapped
-------- ---- c - 0 disable compensation for
cfwv
losses due to copper,
1 enable compensaion for
losses due to copper
f - 0 disable compensation for
losses due to iron,
1 enable compensaion for
losses due to iron
w - 0 add watt compensation,
1 subtract watt compensation
v - 0 add var compensation,
1 subtract var compensation
1
75CC
- 7.50E
+06
3015
7
- 3018
2
Reserved
7.50E
+07
- 7.50E
+07
3018
3
- 3018
3
Programmable
Settings Update
Counter
7.50E
+08
- 7626
3018
4
- 3024
7
Reserved for
Software Use
7627
- 7627
3024
8
- 3024
8
A phase PT
compensation @
69V (% error)
SINT16
-99.99 to
99.99
0.01%
1
7628
- 7628
3024
9
- 3024
9
A phase PT
compensation @
120V (% error)
SINT16
-99.99 to
99.99
0.01%
1
7629
- 7629
3025
0
- 3025
0
A phase PT
compensation @
230V (% error)
SINT16
-99.99 to
99.99
0.01%
1
762A
- 762A
3025
1
- 3025
1
A phase PT
compensation @
480V (% error)
SINT16
-99.99 to
99.99
0.01%
1
762B
- 762B
3025
2
- 3025
5
B phase PT
compensation @
69V, 120V, 230V,
480V (% error)
SINT16
-99.99 to
99.99
0.01%
4
762F
- 762F
3025
6
- 3025
9
C phase PT
compensation @
69V, 120V, 230V,
480V (% error)
SINT16
-99.99 to
99.99
0.01%
4
B–56
UINT16
0-65535
Reserved
26
Increments each time
programmable settings are
changed; occurs when new
checksum is calculated.
1
Reserved
64
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 31 of 36)
Modbus Address
Hex
7633
Decimal
- 7633
3026
0
- 3026
0
Description (Note 1)
Format
A phase CT
compensation @ c1
(% error)
SINT16
Range
(Note 6)
-99.99 to
99.99
Units or
Resolution
0.01%
Comments
#
Reg
For Class 10 unit
c1=0.25A
c2=0.5A
c3=1A
c4=5A
1
For Class 2 unit
c1=0.05A
c2=0.1A
c3=0.2A
c4=1A
7634
- 7634
3026
1
- 3026
1
A phase CT
compensation @ c2
(% error)
SINT16
-99.99 to
99.99
0.01%
1
7635
- 7635
3026
2
- 3026
2
A phase CT
compensation @ c3
(% error)
SINT16
-99.99 to
99.99
0.01%
1
7636
- 7636
3026
3
- 3026
3
A phase CT
compensation @ c4
(% error)
SINT16
-99.99 to
99.99
0.01%
1
7637
- 7637
3026
4
- 3026
7
B phase CT
compensation @ c1,
c2, c3, c4 (% error)
SINT16
-99.99 to
99.99
0.01%
4
763B
- 763E
3026
8
- 3027
1
C phase CT
compensation @ c1,
c2, c3, c4 (% error)
SINT16
-99.99 to
99.99
0.01%
4
763F
- 7642
3027
2
- 3027
5
A phase PF
compensation @ c1,
c2, c3, c4 (% error)
SINT16
-99.99 to
99.99
0.01%
4
7643
- 7646
3027
6
- 3027
9
B phase PF
compensation @ c1,
c2, c3, c4 (% error)
SINT16
-99.99 to
99.99
0.01%
4
7647
- 764A
3028
0
- 3028
3
C phase PF
compensation @ c1,
c2, c3, c4 (% error)
SINT16
-99.99 to
99.99
0.01%
4
Block Size:
Log Setups Block
7917
284
write only in PS update mode
7917
3100
0
3100
- 0
Historical Log #1
Sizes
UINT16
bit-mapped
eeeeeeee
ssssssss
high byte is number of registers to
log in each record (0-117),
low byte is number of flash sectors
for the log (see note 19)
0 in either byte disables the log
1
7918
- 7918
3100
1
- 3100
1
Historical Log #1
Interval
UINT16
bit-mapped
00000000
hgfedcba
only 1 bit set: a=1 min, b=3 min, c=5
min, d=10 min, e=15 min, f=30 min,
g=60 min, h=EOI pulse
1
7919
- 7919
3100
2
- 3100
2
Historical Log #1,
Register #1
Identifier
UINT16
0 to 65535
use Modbus address as the
identifier (see note 7)
1
791A
- 798D
3100
3
- 3111
8
Historical Log #1,
Register #2 - #117
Identifiers
UINT16
0 to 65535
same as Register #1 Identifier
116
798E
- 79D6
3111
9
- 3119
1
Historical Log #1
Software Buffer
Reserved for software use.
73
79D7
- 7A96
3119
2
- 3138
3
Historical Log #2
Sizes, Interval,
Registers &
Software Buffer
-
same as
Historic
al Log
#1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
192
B–57
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 32 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
7A97
- 7B56
3138
4
- 3157
5
Historical Log #3
Sizes, Interval,
Registers &
Software Buffer
same as
Historic
al Log
#1
7B57
- 7B57
3157
6
- 3160
7
Waveform Log
Sample Rate &
Pretrigger
UINT16
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
192
bit-mapped
ssssssss
pppppppp
High byte is samples/60Hz cycle =
5(32), 6(64), 7(128), 8(256), or 9(512)
Low byte is number of pretrigger
cycles.
1
Block Size:
608
Secondary Readings Section
Secondary Block
read-only except as noted
9C40
- 9C40
4000
1
- 4000
1
System Sanity
Indicator
UINT16
0 or 1
9C41
- 9C41
4000
2
- 4000
2
Volts A-N
UINT16
9C42
- 9C42
4000
3
- 4000
3
Volts B-N
9C43
- 9C43
4000
4
- 4000
4
9C44
- 9C44
4000
5
9C45
- 9C45
9C46
0 indicates proper meter operation
1
2047 to 4095 volts
2047= 0, 4095= +150
1
UINT16
2047 to 4095 volts
volts = 150 * (register - 2047) / 2047
1
Volts C-N
UINT16
2047 to 4095 volts
- 4000
5
Amps A
UINT16
0 to 4095
amps
4000
6
- 4000
6
Amps B
UINT16
0 to 4095
amps
1
- 9C46
4000
7
- 4000
7
Amps C
UINT16
0 to 4095
amps
1
9C47
- 9C47
4000
8
- 4000
8
Watts, 3-Ph total
UINT16
0 to 4095
watts
9C48
- 9C48
4000
9
- 4000
9
VARs, 3-Ph total
UINT16
0 to 4095
VARs
9C49
- 9C49
4001
0
- 4001
0
VAs, 3-Ph total
UINT16
2047 to 4095 VAs
9C4A
- 9C4A
4001
1
- 4001
1
Power Factor, 3-Ph
total
UINT16
1047 to 3047 none
1047= -1, 2047= 0, 3047= +1
pf = (register - 2047) / 1000
1
9C4B
- 9C4B
4001
2
- 4001
2
Frequency
UINT16
0 to 2730
0= 45 or less, 2047= 60, 2730= 65 or
more
freq = 45 + ((register / 4095) * 30)
1
9C4C
- 9C4C
4001
3
- 4001
3
Volts A-B
UINT16
2047 to 4095 volts
2047= 0, 4095= +300
volts = 300 * (register - 2047) / 2047
1
9C4D
- 9C4D
4001
4
- 4001
4
Volts B-C
UINT16
2047 to 4095 volts
1
9C4E
- 9C4E
4001
5
- 4001
5
Volts C-A
UINT16
2047 to 4095 volts
1
9C4F
- 9C4F
4001
6
- 4001
6
CT numerator
UINT16
1 to 9999
none
9C50
- 9C50
4001
7
- 4001
7
CT multiplier
UINT16
1, 10, 100
none
1
9C51
- 9C51
4001
8
- 4001
8
CT denominator
UINT16
1 or 5
none
1
B–58
none
Hz
1
0= -10, 2047= 0, 4095= +10
amps = 10 * (register - 2047) / 2047
0= -3000, 2047= 0, 4095= +3000
watts, VARs, VAs =
3000 * (register - 2047) / 2047
1
1
1
1
CT = numerator * multiplier /
denominator
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 33 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
9C52
- 9C52
4001
9
- 4001
9
PT numerator
UINT16
1 to 9999
none
9C53
- 9C53
4002
0
- 4002
0
PT multiplier
UINT16
1, 10, 100,
1000
none
1
9C54
- 9C54
4002
1
- 4002
1
PT denominator
UINT16
1 to 9999
none
1
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
PT = numerator * multiplier /
denominator
#
Reg
1
B–59
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 34 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
9C55
- 9C56
4002
2
- 4002
3
W-hours, Positive
UINT32
0 to
99999999
Wh per
energy
format
9C57
- 9C58
4002
4
- 4002
5
W-hours, Negative
UINT32
0 to
99999999
Wh per
energy
format
9C59
- 9C5A
4002
6
- 4002
7
VAR-hours, Positive
UINT32
0 to
99999999
VARh per
energy
format
9C5B
- 9C5C
4002
8
- 4002
9
VAR-hours, Negative UINT32
0 to
99999999
VARh per
energy
format
2
9C5D
- 9C5E
4003
0
- 4003
1
VA-hours
UINT32
0 to
99999999
VAh per
energy
format
2
9C5F
- 9C60
4003
2
- 4003
3
W-hours, Positive,
Phase A
UINT32
0 to
99999999
Wh per
energy
format
2
9C61
- 9C62
4003
4
- 4003
5
W-hours, Positive,
Phase B
UINT32
0 to
99999999
Wh per
energy
format
2
9C63
- 9C64
4003
6
- 4003
7
W-hours, Positive,
Phase C
UINT32
0 to
99999999
Wh per
energy
format
2
9C65
- 9C66
4003
8
- 4003
9
W-hours, Negative,
Phase A
UINT32
0 to
99999999
Wh per
energy
format
2
9C67
- 9C68
4004
0
- 4004
1
W-hours, Negative,
Phase B
UINT32
0 to
99999999
Wh per
energy
format
2
9C69
- 9C6A
4004
2
- 4004
3
W-hours, Negative,
Phase C
UINT32
0 to
99999999
Wh per
energy
format
2
9C6B
- 9C6C
4004
4
- 4004
5
VAR-hours, Positive,
Phase A
UINT32
0 to
99999999
VARh per
energy
format
2
9C6D
- 9C6E
4004
6
- 4004
7
VAR-hours, Positive,
Phase B
UINT32
0 to
99999999
VARh per
energy
format
2
9C6F
- 9C70
4004
8
- 4004
9
VAR-hours, Positive,
Phase C
UINT32
0 to
99999999
VARh per
energy
format
2
9C71
- 9C72
4005
0
- 4005
1
VAR-hours,
Negative, Phase A
UINT32
0 to
99999999
VARh per
energy
format
2
9C73
- 9C74
4005
2
- 4005
3
VAR-hours,
Negative, Phase B
UINT32
0 to
99999999
VARh per
energy
format
2
9C75
- 9C76
4005
4
- 4005
5
VAR-hours,
Negative, Phase C
UINT32
0 to
99999999
VARh per
energy
format
2
9C77
- 9C78
4005
6
- 4005
7
VA-hours, Phase A
UINT32
0 to
99999999
VAh per
energy
format
2
9C79
- 9C7A
4005
8
- 4005
9
VA-hours, Phase B
UINT32
0 to
99999999
VAh per
energy
format
2
9C7B
- 9C7C
4006
0
- 4006
1
VA-hours, Phase C
UINT32
0 to
99999999
VAh per
energy
format
2
B–60
* 5 to 8 digits
* decimal point implied, per energy
format
* resolution of digit before decimal
point = units, kilo, or mega, per
energy format
2
* see note 10
2
2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Table B–1: (Sheet 35 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
9C80
- 9C80
4006
5
- 4006
5
VARs, Phase A
UINT16
0 to 4095
VARs
9C81
- 9C81
4006
6
- 4006
6
VARs, Phase B
UINT16
0 to 4095
VARs
9C82
- 9C82
4006
7
- 4006
7
VARs, Phase C
UINT16
0 to 4095
VARs
9C83
- 9C83
4006
8
- 4006
8
VAs, Phase A
UINT16
2047 to 4095 VAs
1
9C84
- 9C84
4006
9
- 4006
9
VAs, Phase B
UINT16
2047 to 4095 VAs
1
9C85
- 9C85
4007
0
- 4007
0
VAs, Phase C
UINT16
2047 to 4095 VAs
1
9C86
- 9C86
4007
1
- 4007
1
Power Factor, Phase
A
UINT16
1047 to 3047 none
9C87
- 9C87
4007
2
- 4007
2
Power Factor, Phase
B
UINT16
1047 to 3047 none
1
9C88
- 9C88
4007
3
- 4007
3
Power Factor, Phase
C
UINT16
1047 to 3047 none
1
9C89
- 9CA2
4007
4
- 4009
9
Reserved
N/A
N/A
9CA3
- 9CA3
4010
0
- 4010
0
Reset Energy
Accumulators
UINT16
password
(Note 5)
none
0= -3000, 2047= 0, 4095= +3000
watts, VARs, VAs =
3000 * (register - 2047) / 2047
1
1
1
1047= -1, 2047= 0, 3047= +1
pf = (register - 2047) / 1000
1
Reserved
26
write-only register; always reads as
0
1
Block Size:
100
Log Retrieval Section
Log Retrieval Block
read/write except as noted
C34C
- C34D
4999
7
- 4999
8
Log Retrieval
Session Duration
UINT32
0 to
4294967294
C34E
- C34E
4999
9
- 4999
9
Log Retrieval
Session Com Port
UINT16
0 to 4
C34F
- C34F
5000
0
- 5000
0
Log Number, Enable,
Scope
UINT16
bit-mapped
C350
- C350
5000
1
- 5000
1
Records per
Window or Batch,
Record Scope
Selector, Number of
Repeats
UINT16
bit-mapped
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
4 msec
0 if no session active; wraps around
after max count
2
0 if no session active, 1-4 for
session active on COM1 - COM4
1
nnnnnnnn
esssssss
high byte is the log number (0system, 1-alarm, 2-history1, 3history2, 4-history3, 5-I/O changes,
11-waveform, (11 reserved for
future use)
e is retrieval session enable(1) or
disable(0)
sssssss is what to retrieve (0normal record, 1-timestamps only,
2-complete memory image (no
data validation if image)
1
wwwwww
ww
snnnnnnn
high byte is records per window if
1
s=0 or records per batch if s=1, low
byte is number of repeats for
function 35 or 0 to suppress autoincrementing; max number of
repeats is 8 (RTU) or 4 (ASCII) total
windows, a batch is all the windows
B–61
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
Table B–1: (Sheet 36 of 36)
Modbus Address
Hex
Decimal
Description (Note 1)
Format
Range
(Note 6)
Units or
Resolution
Comments
#
Reg
C351
- C352
5000
2
- 5000
3
Offset of First
Record in Window
UINT32
bit-mapped
ssssssss
nnnnnnnn
nnnnnnnn
nnnnnnnn
ssssssss is window status (0 to 7window number, 0xFF-not ready);
this byte is read-only.
nn?nn is a 24-bit record number.
The log's first record is latched as a
reference point when the session is
enabled. This offset is a record
index relative to that point. Value
provided is the relative index of the
whole or partial record that begins
the window.
2
C353
- C3CD
5000
4
- 5012
6
Log Retrieve
Window
UINT16
see
comments
none
mapped per record layout and
retrieval scope, read-only
123
Block Size:
130
Log Status Block
read only
Alarm Log Status Block
C737
- C738
5100
0
- 5100
1
Log Size in Records
UINT32
0 to
4,294,967,29
4
record
2
C739
- C73A
5100
2
- 5100
3
Number of Records
Used
UINT32
1 to
4,294,967,29
4
record
2
C73B
- C73B
5100
4
- 5100
4
Record Size in Bytes
UINT16
14 to 242
byte
1
C73C
- C73C
5100
5
- 5100
5
Log Availability
UINT16
C73D
- C73F
5100
6
- 5100
8
Timestamp, First
Record
TSTAMP
1Jan2000 31Dec2099
1 sec
3
C740
- C742
5100
9
- 5101
1
Timestamp, Last
Record
TSTAMP
1Jan2000 31Dec2099
1 sec
3
C743
- C746
5101
2
- 5101
5
Reserved
C747
- C756
5101
6
- 5103
1
System Log Status
Block
same as
alarm log
status block
16
C757
- C766
5103
2
- 5104
7
Historical Log 1
Status Block
same as
alarm log
status block
16
C767
- C776
5104
8
- 5106
3
Historical Log 2
Status Block
same as
alarm log
status block
16
C777
- C786
5106
4
- 5107
9
Historical Log 3
Status Block
same as
alarm log
status block
16
C787
- C796
5108
0
- 5109
5
Reserved
C7A7
- C7B6
5111
2
- 5112
7
Waveform Capture
Log Status Block
none
0=available,
1-4=in use by COM1-4,
0xFFFF=not available (log size=0)
Reserved
Individual Log Status Block Size:
1
4
16
16
same as
alarm log
status block
16
Block Size:
128
End of Map
B–62
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
MODBUS REGISTER MAP
Data Formats
ASCII
ASCII characters packed 2 per register in high, low order and without any termination characters. For
example, EPM 7100 would be 4 registers containing 0x5378, 0x6172, 0x6B32, 0x3030.
SINT16 / UINT16
16-bit signed / unsigned integer.
SINT32 / UINT32
32-bit signed / unsigned integer spanning 2 registers. The lower-addressed register is the high order half.
FLOAT
32-bit IEEE floating point number spanning 2 registers. The lower-addressed register is the high order
half (i.e., contains the exponent).
TSTAMP
3 adjacent registers, 2 bytes each. First (lowest-addressed) register high byte is year (0-99), low byte is
month (1-12). Middle register high byte is day(1-31), low byte is hour (0-23 plus DST bit). DST (daylight
saving time) bit is bit 6 (0x40). Third register high byte is minutes (0-59), low byte is seconds (0-59). For
example, 9:35:07AM on October 12, 2049 would be 0x310A, 0x0C49, 0x2307, assuming DST is in effect.
Notes
1
All registers not explicitly listed in the table read as 0. Writes to these registers will be accepted but won't actually change
the register (since it doesn't exist).
2
Meter Data Section items read as 0 until first readings are available or if the meter is not in operating mode. Writes to
these registers will be accepted but won't actually change the register.
3
Register valid only in programmable settings update mode. In other modes these registers read as 0 and return an illegal
data address exception if a write is attempted.
4
Meter command registers always read as 0. They may be written only when the meter is in a suitable mode. The registers
return an illegal data address exception if a write is attempted in an incorrect mode.
5
If the password is incorrect, a valid response is returned but the command is not executed. Use 5555 for the password if
passwords are disabled in the programmable settings.
6
M denotes a 1,000,000 multiplier.
7
Each identifier is a Modbus register. For entities that occupy multiple registers (FLOAT, SINT32, etc.) all registers making up
the entity must be listed, in ascending order. For example, to log phase A volts, VAs, voltage THD, and VA hours, the
register list would be 0x3E7, 0x3E8, 0x411, 0x412, 0x176F, 0x61D, 0x61E and the number of registers (0x7917 high byte)
would be 7.
8
Writing this register causes data to be saved permanently in nonvolatile memory. Reply to the command indicates that it
was accepted but not whether or not the save was successful. This can only be determined after the meter has restarted.
9
Reset commands make no sense if the meter state is LIMP. An illegal function exception will be returned.
10
Energy registers should be reset after a format change.
11
Entities to be monitored against limits are identified by Modbus address. Entities occupying multiple Modbus registers,
such as floating point values, are identified by the lower register address. If any of the 8 limits is unused, set its identifier
to zero. If the indicated Modbus register is not used or is a nonsensical entity for limits, it will behave as an unused limit.
12
There are 2 setpoints per limit, one above and one below the expected range of values. LM1 is the "too high" limit, LM2 is
"too low". The entity goes "out of limit" on LM1 when its value is greater than the setpoint. It remains "out of limit" until the
value drops below the in threshold. LM2 works similarly, in the opposite direction. If limits in only one direction are of
interest, set the in threshold on the "wrong" side of the setpoint. Limits are specified as % of full scale, where full scale is
automatically set appropriately for the entity being monitored:
13
current
FS = CT
numerator *
CT multiplier
voltage
FS = PT
3 phase power
FS = CT numerator * CT multiplier * PT numerator * PT
single phase power
FS = CT numerator * CT multiplier * PT numerator * PT
frequency
FS = 60 (or
power factor
FS = 1.0
percentage
FS = 100.0
angle
FS = 180.0
THD not available shows 10000 in all THD and harmonic magnitude and phase registers for the channel. THD may be
unavailable due to low V or I amplitude, delta hookup (V only), or setting.
14
Option Card Identification and Configuration Block is an image of the EEPROM on the card
15
A block of data and control registers is allocated for each option slot. Interpretation of the register data depends on what
card is in the slot.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
B–63
MODBUS REGISTER MAP
APPENDIX B: MODBUS MAPPING & LOG RETRIEVAL FOR THE EPM 7100 METER
16
Measurement states: Off occurs during programmable settings updates; Run is the normal measuring state; Limp
indicates that an essential non-volatile memory block is corrupted; and Warmup occurs briefly (approximately 4 seconds)
at startup while the readings stabilize. Run state is required for measurement, historical logging, demand interval
processing, limit alarm evaluation, min/max comparisons, and THD calculations. Resetting min/max or energy is allowed
only in run and off states; warmup will return a busy exception. In limp state, the meter reboots at 5 minute intervals in an
effort to clear the problem.
17
Limits evaluation for all entities except demand averages commences immediately after the warmup period. Evaluation
for demand averages, maximum demands, and minimum demands commences at the end of the first demand interval
after startup.
18
Autoincrementing and function 35 must be used when retrieving waveform logs.
19
Depending on the Software Option setting, there are 15, 29, or 45 flash sectors available in a common pool for distribution
among the 3 historical and waveform logs. The pool size, number of sectors for each log, and the number of registers per
record together determine the maximum number of records a log can hold.
S = number of sectors assigned to the log,
H = number of Modbus registers to be monitored in each historical record (up to 117),
R = number of bytes per record = (12 + 2H) for historical logs
N = number of records per sector = 65516 / R, rounded down to an integer value (no partial records in a sector)
T = total number of records the log can hold = S * N
T = S * 2 for the waveform log.
20
Only 1 input on all digital input cards may be specified as the end-of-interval pulse.
21
Logs cannot be reset during log retrieval. Waveform log cannot be reset while storing a capture. Busy exception will be
returned.
B–64
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Appendix C: Using DNP Mapping
for the EPM 7100
Meter
Using DNP Mapping for the EPM 7100 Meter
C.1
Overview
This Appendix describes the functionality of the EPM 7100 meter's version of the DNP
protocol. A DNP programmer needs this information to retrieve data from the EPM 7100
meter. The DNP version used by the EPM 7100 is a reduced set of the Distributed Network
Protocol Version 3.0 subset 2; it gives enough functionality to get critical measurements
from the EPM 7100 meter.
The EPM 7100 meter's DNP version supports Class 0 object/qualifiers 0,1,2,6, only. No
event generation is supported. The EPM 7100 meter always acts as a secondary device
(slave) in DNP communication.
A new feature allows DNP readings in primary units with user-set scaling for current,
voltage, and power (see the GE Communicator Instruction Manual for instructions).
C.2
Physical Layer
The EPM 7100 meter's DNP version uses serial communication. Port 2 (RS485 compliant
port) or any communication capable option board can be used. Speed and data format is
transparent for the EPM 7100 meter's DNP version: they can be set to any supported value.
The IrDA port cannot use DNP.
C.3
Data Link Layer
The EPM 7100 meter can be assigned a value from 1 to 65534 as the target device
address. The data link layer follows the standard frame FT3 used by DNP Version 3.0
protocol, but only 4 functions are implemented: Reset Link, Reset User, Unconfirmed User
Data, and Link Status, as depicted in the following table.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
C–1
APPLICATION LAYER
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
Table C–1: Supported Link Functions
Function
Function Code
Reset Link
0
Reset User
1
Unconfirmed User Data
4
Link Status
9
[dst] and [src] are the device address of the EPM 7100 Meter and Master device,
respectively. Please refer to Section C.7 for more detail on supported frames for the data
link layer.
In order to establish optimal communication with the EPM 7100 meter, we recommend you
perform the Reset Link and Reset User functions. The Link Status is not mandatory but if
queried it will be attended to. The inter-character time-out for DNP is 1 second. If this
amount of time, or more, elapses between two consecutive characters within a FT3 frame,
the frame will be dropped.
C.4
Application Layer
In the EPM 7100 meter, DNP supports the Read function, Write Function, the Direct
Operate function and the Direct Operate Unconfirmed function.
• The Read function (code 01) provides a means for reading the critical measurement data
from the meter. This function should be posted to read object 60 variation 1, which will
read all the available Class 0 objects from the DNP register map. See the register map in
Section C.6. In order to retrieve all objects with their respective variations, the qualifier
must be set to ALL (0x06). See Section C.7 for an example showing a read Class 0 request
data from the meter.
• The Write function (code 02) provides a mean for clearing the Device restart bit in the
Internal Indicator register only. This is mapped to Object 80, point 0 with variation 1. When
clearing the restart device indicator use qualifier 0. Section C.7 shows the supported
frames for this function.
• The Direct Operate function (code 05) is intended for resetting the energy counters and
the Demand counters (minimum and maximum energy registers). These actions are
mapped to Object 12, points 0 and 2, which act as control relays. The relays must be
operated (On) in 0 msec and released (Off) in 1 msec only. Qualifiers 0x17 or x28 are
supported for writing the energy reset. Sample frames are shown in Section C.7.
• The Direct Operate Unconfirmed (or Unacknowledged) function (code 06) is intended for
asking the communication port to switch to Modbus RTU protocol from DNP. This switching
acts as a control relay mapped into Object 12, point 1 in the meter. The relay must be
operated with qualifier 0x17, code 3 count 0, with 0 milliseconds on and 1 millisecond off,
only. After sending this request the current communication port will accept Modbus RTU
frames only. To make this port go back to DNP protocol, the unit must be powered down
and up. Section C.7 shows the constructed frame to perform DNP to Modbus RTU protocol
change.
C–2
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
C.5
ERROR REPLY
Error Reply
In the case of an unsupported function, or any other recognizable error, an error reply will
be generated from the EPM 7100 meter to the Primary station (the requester). The Internal
Indicator field will report the type of error: unsupported function or bad parameter.
The broadcast acknowledge and restart bit, are also signaled in the internal indicator but
they do not indicate an error condition.
C.6
DNP Register Map
Object 10 – Binary Output States
Object
Point
Var
Description
Format
10
0
2
Reset Energy
Counters
BYTE
10
1
2
Change to
Modbus RTU
Protocol
10
2
2
Reset
Demand
Cntrs (Max /
Min)
Range
Multiplier
Units
Comments
Always 1
N/A
None
Read by Class 0
or with qualifier
0, 1, 2, or 6
BYTE
Always 1
N/A
None
Read by Class 0
or with qualifier
0, 1, 2, or 6
BYTE
Always 1
N/A
None
Read by Class 0
or with qualifier
0, 1, 2, or 6
Object 12 – Control Relay Outputs
Object
Point
Var
Description
Format
Range
Multiplier
Units
12
0
1
Reset
Energy
Counters
N/A
N/A
N/A
none
Responds to
Function 5 (Direct
Operate), Qualifier
Code 17x or 28x,
Control Code 3,
Count 0, On 0 msec,
Off 1 msec ONLY.
12
1
1
Change to
Modbus RTU
Protocol
N/A
N/A
N/A
none
Responds to
Function 6 (Direct
Operate - No Ack),
Qualifier Code 17x,
Control Code 3,
Count 0, On 0 msec,
Off 1 msec ONLY.
12
2
1
Reset
Demand
Counters
(Max /Min)
N/A
N/A
N/A
none
Responds to
Function 5 (Direct
Operate), Qualifier
Code 17x or 28x,
Control Code 3,
Count 0, On 0 msec,
Off 1 msec ONLY.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
Comments
C–3
DNP REGISTER MAP
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
Object 20 – Binary Counters (Primary Readings) - Read via Class 0 only
Object
Point
Var
Description
Format
Range
Multiplier
Units
Comments
20
0
5
W-hours,
Positive
UINT32
0 to
99999999
Multiplier = 10(n-d),
where n and d are
derived from the
energy format. n =
0, 3, or 6 per energy
format scale and d =
number of decimal
places.
W hr
example: energy
format = 7.2K and
Whours counter =
1234567 n=3 (K
scale), d=2 ( 2
digits after
decimal point),
multiplier = 10(3-2)
= 101 = 10, so
energy is 1234567
* 10 Whrs, or
12345.67 KWhrs
20
1
5
W-hours,
Negative
UINT32
0 to
99999999
W hr
20
2
5
VAR-hours,
Positive
UINT32
0 to
99999999
VAR
hr
20
3
5
VAR-hours,
Negative
UINT32
0 to
99999999
VAR
hr
20
4
5
VA-hours,
Total
UINT32
0 to
99999999
VA hr
Object 30 – Analog Inputs (Secondary Readings) - Read via Class 0 only
Object
Point
30
0
4
Meter Health
sint16
0 or 1
N/A
None
0 = OK
30
1
4
Volts A-N
sint16
0 to 32767
(150 / 32768)
V
Values above
150V secondary
read 32767.
30
2
4
Volts B-N
sint16
0 to 32767
(150 / 32768)
V
30
3
4
Volts C-N
sint16
0 to 32767
(150 / 32768)
V
30
4
4
Volts A-B
sint16
0 to 32767
(300 / 32768)
V
30
5
4
Volts B-C
sint16
0 to 32767
(300 / 32768)
V
30
6
4
Volts C-A
sint16
0 to 32767
(300 / 32768)
V
30
7
4
Amps A
sint16
0 to 32767
(10 / 32768)
A
30
8
4
Amps B
sint16
0 to 32767
(10 / 32768)
A
30
9
4
Amps C
sint16
0 to 32767
(10 / 32768)
A
30
10
4
Watts, 3-Ph total
sint16
-32768 to
+32767
(4500 / 32768)
W
30
11
4
VARs, 3-Ph total
sint16
-32768 to
+32767
(4500 / 32768)
VAR
30
12
4
VAs, 3-Ph total s
int16
0 to +32767
(4500 / 32768)
VA
30
13
4
Power Factor, 3Ph total
sint16
-1000 to +1000
0.001
None
C–4
Var
Description
Format
Range
Multiplier
Units
Comments
Values above
300V secondary
read 32767.
Values above
10A secondary
read 32767.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
Var
Description
DNP REGISTER MAP
Object
Point
Format
Range
Multiplier
Units
30
14
4
Frequency
sint16
0 to 9999
0.01
Hz
30
15
4
Positive Watts,
3-Ph, Maximum
Avg Demand
sint16
-32768 to
+32767
(4500 / 32768)
W
30
16
4
Positive VARs, 3Ph, Maximum
Avg Demand
sint16
-32768 to
+32767
(4500 / 32768)
VAR
30
17
4
Negative Watts,
3-Ph, Maximum
Avg Demand
sint16
-32768 to
+32767
(4500 / 32768)
W
30
18
4
Negative VARs,
3-Ph, Maximum
Avg Demand
sint16
-32768 to
+32767
(4500 / 32768)
VAR
30
19
4
VAs, 3-Ph,
Maximum Avg
Demand
sint16
-32768 to
+32767
(4500 / 32768)
VA
30
20
4
Angle, Phase A
Current
sint16
-1800 to +1800
0.1
degree
30
21
4
Angle, Phase B
Current
sint16
-1800 to +1800
0.1
degree
30
22
4
Angle, Phase C
Current
sint16
-1800 to +1800
0.1
degree
30
23
4
Angle, Volts A-B
sint16
-1800 to +1800
0.1
degree
30
24
4
Angle, Volts B-C
sint16
-1800 to +1800
0.1
degree
30
25
4
Angle, Volts C-A
sint16
-1800 to +1800
0.1
degree
30
26
4
CT numerator
sint16
1 to 9999
N/A
none
30
27
4
CT multiplier
sint16
1, 10, or 100
N/A
none
30
28
4
CT denominator
sint16
1 or 5
N/A
none
30
29
4
PT numerator
SINT16
1 to 9999
N/A
none
30
30
4
PT multiplier
SINT16
1, 10, or 100
N/A
none
30
31
4
PT denominator
SINT16
1 to 9999
N/A
none
30
32
4
Neutral Current
SINT16
0 to 32767
(10 / 32768)
A
Comments
CT ratio =
(numerator *
multiplier) /
denominator
PT ratio =
(numerator *
multiplier) /
denominator
For 1A model,
multiplier is (2 /
32768) and
values above 2A
secondary read
32767.
Object 80 – Internal Indicator
Object
80
Point
0
Var
1
Description
Format
Range
Multiplier
Units
Device
Restart Bit
N/A
N/A
N/A
none
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
Comments
Clear via Function
2 (Write), Qualifier
Code 0.
C–5
DNP MESSAGE LAYOUTS
C.7
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
DNP Message Layouts
Legend
All numbers are in hexadecimal base. In addition the following symbols are used.
dst
16 bit frame destination address
src
16 bit frame source address
crc
DNP Cyclic redundant checksum (polynomial
x16+x13+x12+x11+x10+x7+x6+x5+x2+1)
x
transport layer data sequence number
y
application layer data sequence number
Link Layer related frames
C–6
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
DNP MESSAGE LAYOUTS
Application Layer related frames
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
C–7
DNP MESSAGE LAYOUTS
C–8
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
INTERNAL INDICATION BITS
Error Reply
C.8
Internal Indication Bits
Bits implemented in the EPM 7100 meter are listed below. All others are always reported as
zeroes.
Bad Function
Occurs if the function code in a User Data request is not Read (0x01), Write (0x02), Direct
Operate (0x05), or Direct Operate, No Ack (0x06).
Object Unknown
Occurs if an unsupported object is specified for the Read function. Only objects 10, 20, 30,
and 60 are supported.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
C–9
INTERNAL INDICATION BITS
APPENDIX C: USING DNP MAPPING FOR THE EPM 7100 METER
Out of Range
Occurs for most other errors in a request, such as requesting points that don’t exist or
direct operate requests in unsupported formats.
Buffer Overflow
Occurs if a read request or a read response is too large for its respective buffer. In general,
if the request overflows, there will be no data in the response while if the response
overflows at least the first object will be returned. The largest acceptable request has a
length field of 26, i.e. link header plus 21 bytes more, not counting checksums. The largest
possible response has 7 blocks plus the link header.
Restart
All Stations
These 2 bits are reported in accordance with standard practice.
C–10
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
GE
Digital Energy
EPM 7100 Electronic Submeter
Appendix D: Manual Revision
History
Manual Revision History
D.1
Release Notes
Table D–1: Release Dates
MANUAL
GE PART NO.
RELEASE DATE
GEK-113637
1601-0035-A1
February 2012
GEK-113637A
1601-0035-A2
September 2015
Table D–2: Major Updates for 1601-0035-A2
SECT
(A6)
SECT
(A7)
DESCRIPTION
Title
Title
Manual part number to 1601-0035-A2
Cover
Cover
Updated format, and front matter.
N/A
N/A
Added figures to Chapter 3 onwards.
App B
App B
Updated Modbus Map.
App C
App C
Updated DNP information.
N/A
N/A
Minor corrections throughout.
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
D–1
RELEASE NOTES
D–2
APPENDIX D: MANUAL REVISION HISTORY
EPM 7100 ELECTRONIC SUBMETER – INSTRUCTION MANUAL
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