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Creating Best Value
MFM374
Multifunction Meter
OPERATING INSTRUCTIONS
Operating / 1009 / MFM374 / Ver1, OP300-V01.
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1. INTRODUCTION
1.1 About MFM374.............................................................................................. 01
1.2 Overview........................................................................................................ 02
1.3 Technical Overview........................................................................................ 04
1.4 Installation Guide........................................................................................... 08
1.5 Wiring Guide.................................................................................................. 11
2. HUMAN MACHINE INTERFACE (HMI)............................................................. 15
3. CONFIGURATION.............................................................................................. 21
4. APPLICATIONS................................................................................................. 29
5. COMMUNICATION
5.1 Modbus Parameter....................................................................................... 30
6. USER GUIDE..................................................................................................... 38
7. CONFIG RECORD SHEET................................................................................ 39
Note selec
01
Introduction
ABOUT MFM374
A suitable meter for the measurement of parameters such as voltage, current, power factor, frequency, power and energy. Features such as pulse output, communication are available thereby providing a complete solution for many measurement needs.
APPLICATIONS:
1. Electric Automation SCADA System:
MFM374 can be used as Remote Terminal Unit (RTU) for monitoring purpose in a
SCADA System. All measured data is available through RS485 communication ports with the Modbus Protocol.
2. Energy Management System / Building Management System:
MFM374 can be used to monitor power and energy parameters of an organizations which can be transmitted to main control room through RS485
3. Heavy Industries:
MFM374 is a suitable meter for heavy industries because of its ability to function even in rough conditions.
4. Power Transmission and Distribution field
5. Power System Protection Field
6. Industry Automation
7. Large UPS System
Note: Please read this manual carefully & completely before installing /
operating MFM374.
Specifications are subject to change as development is a continuous process
Introduction
Overview
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02
SALIENT FEATURES
Ø 3 rows of 4 digits
Ø Network supported: 1Ø-2 wire, 2Ø-3 wire, 3Ø-3 wire, 3Ø-4 wire
Ø User programmable network selection
Ø 7-segment red LED display
Ø Auto / manual page scrolling
Ø User programmable page sequence for page displayed in auto mode
Ø Measures all electrical parameters (True RMS Voltage, True RMS Current, Active power, Reactive power, Apparent power, Power factor, Frequency,
Active energy, Reactive energy & Apparent energy )
Ø Programmable CT/ PT primary, CT/PT secondary
Ø Memory retention for ten years
Ø Potential free Pulse output for energy
Ø 85 to 270V AC auxiliary supply
Ø RS485 communication (MODBUS Protocol), (Optional)
Ø Protection covering for terminal screws
ORDER CODE:
1) MFM 374
2) MFM 374-C (With communication version)
Introduction
Overview
Display & Key description
1. 3 lines of seven segment digits in
metering area
Display parameters such as Voltage,
Current, Power factor, Power &
Frequency, Energy
2. Unit (V, A, PF, Hz, kW, kVAr, kVA)
Indicates unit of parameter displayed
3
2
1
Voltage: V, kV
Active Power: kW, MW
Apparent power: kVA, MVA
Active energy: kWh, MWh
Apparent energy: kVAh, MVAh
| Current: A, kA
| Reactive power: kVAr, MVAr
| Frequency: Hz,
| Reactive energy: kVArh, MVArh
3. Keypad: keypad with four dual function keys (HMI or Programming)
4. Display: Bright red LED display for best vision
5. Phase (1, 2, 3, 1-2, 2-3, 3-1) : Display phase to neutral or phase to phase values
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5
4
03
Introduction selec
Technical Overview
Functional Descriptions
Description
MFM374
Display
7 segment bright red LED display
3 lines, 4 digits per line to show electrical parameters
LED Indications
Display update time
Display Scrolling
Online Pages
LED indication for all electrical parameter such as V, I, PF,
Hz, kW, kVA, kVAr, kWh, kVAh, kVArh, k (kilo), M(mega), avg, tot, L1, L2, L3
1 sec for all parameters
Auto / Manual
Customized page selection from available standard pages
(selection via configuration menu)
Input Point Electrical Specification
Electrical input type
Rated input voltage
Rated input current
1 Ø-2 wire, 2 Ø-3 wire, 3 Ø-3 wire, 3 Ø-4 wire
11 to 300V AC max phase to neutral
19 to 519V AC max phase to phase
Nominal 5A AC (11mA minimum)
6A max (External CT is advised to connect)
Frequency range
CT Primary
CT Secondary
PT Primary
PT Secondary
Burden
45 to 65 Hz
1A or 5A to 10,000A (Programmable for any value)
Note: 1A or 5A depends upon the CT secondary
Programmable 1A or 5A
100V to 500kV (Programmable for any value)
100 to 500V AC (L-L) Programmable for any value
0.5 VA per phase @ 5A
04
Introduction
Serial Communication
(Optional)
Interface standard & protocol
MODBUS RTU protocol over RS485
Communication address
Transmission mode
Data types
1 to 255
Half duplex
Float and Integer
Transmission distance
Transmission speed
Parity
Stop bits
Response time
500 m maximum
300, 600,1200, 2400, 4800, 9600,19200 (in bps)
None, Odd, Even
1 or 2
100 ms (Independent of baud rate)
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Pulse Output
Pulse Output (type)
Pulse Voltage
Pulse Current
Pulse Width
General Specification
Auxiliary Supply
Operating frequency
Power Consumption
Temperature
Opto-Isolated
24V DC max.
100mA max.
100 ms ± 50 ms.
85 to 270V AC/DC
50/60Hz
0.5 VA max.@5A per phase
Humidity
Mounting
Weight
o
Storage temperature: -20 to +75 C
85% RH
Panel mounting
320 gms
05
Introduction
Parameter Measured / Calculated
Parameters Measured values
Voltage
V1N, V2N, V3N, V12, V23, V31,
Vavg L-N, Vavg L-L
I , I , I , I
1 2
3 AVG
Current
Active Power
Reactive Power
Apparent Power
Power Factor
Frequency
Active Energy
Reactive Energy
Apparent Energy
Individual and average
Frequency of available phase
Total of all phases
Total of all phases
Total of all phases
Resolution Table
PT Ratio x CT Ratio
<15
<150
<1500
<15000
<150000
≥ 1500000
kWh
0.01K
0.1K
1K
0.01M
0.1M
1M
Unit
V
A kW kVAr kVA
-
Hz kWh kVArh kVAh
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Pulse
0.01K
0.1K
1K
0.01M
0.1M
1M
06
NOTE:
1) For voltage, Current, Power, resolution is automatically adjusted
2) For power factor, resolution is 0.001
Introduction
Accuracy
Measurement
Voltage V
L-N
Average Voltage
L-N
Average Voltage
L-L
Current
Average current
Frequency
Active Power
Apparent power
Reactive Power
Power factor & Avg Pf
Active energy
Reactive energy
Apparent energy
Accuracy
±0.5% of F.S. +1 digit
±0.5% of F.S. +1 digit
±0.5% of F.S. +1 digit
±0.5% of F.S. +1 digit
±0.5% of F.S. +1 digit
±0.5% of F.S. +1 digit
±0.1% for V>20V (L-N)
±0.1% for V>35V (L-L)
Class 1
Class 1
Class 1
±0.01 PF
Class 1
Class 1
Class 1
Toll free: 1800 227 353
Phone: 91-22-28471 1882 / 4039 4200 / 4039 4202
Email: [email protected]
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07
Introduction
Installation Guide
Safety Precautions
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All safety related codifications, symbols and instructions that appear in this operating manual or on the equipment must be strictly followed to ensure the safety of the operating personnel as well as the instrument.
If the equipment is not handled in a manner specified by the manufacturer it might impair the protection provided by the equipment.
CAUTION: Read complete instructions prior to installation and operation
of the unit.
CAUTION: Risk of electric shock.
WIRING GUIDELINES
WARNING:
1. To prevent the risk of electric shock power supply to the equipment must be kept OFF while doing the wiring arrangement.
2. Wiring shall be done strictly according to the terminal layout. Confirm that all connections are correct.
3. Use lugged terminals.
4. To eliminate electromagnetic interference use of wires with adequate ratings and twists of the same in equal size shall be made.
These wires shall have current carrying capacity of 6A.
6. The following safety earth symbol is used in this user’s manual:
08
Introduction selec
Maintenance
1. The equipment should be cleaned regularly to avoid blockage of ventilating parts.
2. Clean the equipment with a clean soft cloth. Do not use Isopropyl alcohol or any other cleaning agent.
Installation Guidelines
CAUTION:
1. This equipment, being built-in-type, normally becomes a part of main control panel and in such case, the terminals do not remain accessible to the end user after installation and internal wiring.
2. Conductors must not come in contact with the internal circuitry of the equipment or else it may lead to a safety hazard that may in turn endanger life or cause electrical shock to the operator.
3. Circuit breaker or mains switch must be installed between power source and supply terminals to facilitate power 'ON' or ‘OFF’ function. However this switch or breaker must be installed in a convenient position normally accessible to the operator.
4. Before disconnecting the secondary of the external current transformer from the equipment, make sure that the current transformer is short circuited to avoid risk of electrical shock and injury.
CAUTION:
1. The equipment shall not be installed in environmental conditions other than those mentioned in this manual.
2. The equipment does not have a built-in-type fuse. Installation of external fuse of rating 275V AC/1Amp for electrical circuitry is highly recommended.
09
Introduction
Mechanical Installation
For installing the controller
1. Prepare the panel cutout with proper dimensions as shown.
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99
90.5
91.5
99
Front bezel
5
50
Side view
91.5
Panel Cutout
2. Push the meter into the panel cutout. Secure the meter in its place by pushing the clamp on the rear side. The screws, of the pane of the clamp, must be in the farthest forward slot.
3. For proper sealing, tighten the screws evenly with required torque.
Tightening torque for clamp: 0.1Nm
CAUTION:
The equipment in its installed state must not come in close proximity to any heating sources, caustic vapors, oils, steam, or other unwanted process byproducts.
EMC Guidelines
EMC Guidelines:
1. Use proper input power cables with shortest connections and twisted type.
2. Layout of connecting cables shall be away from any internal EMI source.
SERVICE DETAILS
This device contains no user serviceable parts and requires special equipment and specialized engineers for repair.
NO WARRANTY ON UNIT DAMAGED DUE TO WRONG INPUT / OUTPUT
WIRING CONNECTION.
10
Introduction
Terminal Diagram
N
L
PULSE O/P RS485
L1
L2
L3
N
S1
I 1
S2 S1
I 2
S2 S1
I 3
S2 N V1 V2 V3
Wiring guide
3 PHASE 4-WIRE (COMMONLY USED) WIRING DIAGRAM
3 Ø - 4 wire, 3 CT’s
L
O
A
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+
+
11
Introduction
Wiring Guide
3 Ø - 4 wire, 3 CT’s & 3 PT’s
+
+
3 PHASE 3-WIRE WIRING DIAGRAM
3 Ø - 3 wire, 2 CT’s & 2 PT’s
+
+
12 selec
Introduction
Wiring Guide
2 PHASE 3-WIRE WIRING DIAGRAM
2 Ø - 3 wire, 2 CT’s
+
+
2 Ø - 3 wire, 2 CT’s & 2 PT’s
+
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13
Introduction
Wiring Guide
1 PHASE 2-WIRE (COMMONLY USED) WIRING DIAGRAM
1 Ø - 2 wire, 1 CT selec
+
+
14
COMMUNICATION WIRING DIAGRAM
( only for MFM374-C )
RS485 to RS232
CONVERTER
+
Master
RS485-RS232 Converter
Part no.- AC-RS485-RS232-01
Suggested Terminating resistor
(120 ohm, ¼ watt)
VL-N
VL-L
W
Wh
VAr
A
VArh
PF
Hz
VA
VAh
VI
A / M
VAF P
PRG
E
MFM374
K
M
L1
L2
L3
AVG
TOT
SHIELDED CABLE
VL-N
VL-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
K
M
L1
L2
L3
AVG
TOT
VL-N
VL-L
W
Wh
VAr
A
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
K
M
L1
L2
L3
AVG
TOT
HMI selec
Online Page Description
There are 4 dedicated keys labelled as VI, VAF, P, E. Use these 4 keys to read meter parameters. Simply press these keys to read the parameters.
01
X1
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
A
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VI ( ) button, the first screen shows:
[ L-N Voltage (V1, V2, V3) of all three phases
Note: LED’s of the corresponding parameters on display, will glow automatically.
A / M
VI VAF P
PRG
E
02
X2
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
MFM374
L1
L2
L3
K
M
AVG
TOT
A / M
VI VAF P
PRG
E
Press VI ( ) button, the second screen shows:
[
L-L voltage (V 1-2, V 2-3,V 3-1 )
03
X3
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VI ( ) button, the third screen shows:
[ Current (I1, I2, I3)
Note: In 3Ø-3 wire system only L-L voltage will be displayed
15
HMI selec
Online Page Description
04
X1
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VAF ( ) button, the first screen shows:
[ Voltage (L-N), Current of first phase (V1, I1) &
Frequency (Hz)
Note: In 3 Ø-3 wire system only L-L voltage, L-L current (V 1-2, I 1-2) & Frequency (Hz) will be displayed
05
X2
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VAF ( ) button, the second screen shows:
[ Voltage (L-N), Current of second phase (V2, I2)
& Frequency (Hz)
Note: In 3 Ø-3 wire system only L-L voltage, L-L current (V 2-3, I 2-3) & Frequency (Hz) will be displayed
06
X3
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VAF ( ) button, the third screen shows:
[ Voltage (L-N), Current of third phase (V3, I3) &
Frequency (Hz)
Note: In 3 Ø-3 wire system only L-L voltage, L-L current
(V 1-3, I 1-3) & Frequency (Hz) will be displayed
16
HMI selec
Online Page Description
07
X4
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VAF ( ) button, the fourth screen shows:
[ Average Voltage (L-N), Current of three phase (V
AVG
, I
AVG
) & Frequency (Hz)
Note: In 3Ø-3 wire system only AVG L-L voltage,
AVG L-L current, & power factor will be displayed
08
X5
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press VAF ( ) button, the fifth screen shows:
[ Average Voltage (L-L), Current of three phase (V
AVG
, I
AVG
) & power factor
09
X1
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press P ( ) button, the first screen shows:
[ Power factor of all three phases (PF1, PF2, PF3).
Note: In 3 Ø-3 wire system only AVG power factor will be displayed
17
A
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
A selec
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
Online Page Description
MFM374
L1
L2
L3
K
M
AVG
TOT
E
Press P ( ) button, the second screen shows:
[ Active Power of all three phases (kW1, kW2, kW3)
Note: In 3Ø-3 wire system only Total kW, kVA, kVAr will be displayed
MFM374
L1
L2
L3
K
M
AVG
TOT
E
Press P ( ) button, the third screen shows:
[ Reactive Power of all three phases
(kVAr1, kVAr2, kVAr3)
Note: In 3Ø-3 wire system only Total kW, kVA, kVAr will be displayed
MFM374
L1
L2
L3
K
M
AVG
TOT
E
Press P ( ) button, the fourth screen shows:
[ Apparent Power of all three phases
(kVA1, kVA2, kVA3)
Note: In 3Ø-3 wire system only Total kW, kVA, kVAr will be displayed
HMI
Online Page Description
13
X5
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press P ( ) button, the fifth screen shows
[ Active, reactive, apparent power (kW1, kVAr1, kVA1) of first phase.
Note: In 3Ø-3 wire system only Total kW, kVA, kVAr will be displayed
14
X6
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
A
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press P ( ) button, the sixth screen shows
[ Active, reactive, apparent power (kW2, kVAr2, kVA2) of second phase.
Note: In 3 Ø-3 wire system only Total kW, kVA, kVAr will be displayed
15
X7
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press P ( ) button, the seventh screen shows
[ Active, reactive, apparent power (kW3, kVAr3, kVA3) of third phase.
Note: In 3 Ø-3 wire system only Total kW, kVA, kVAr will be displayed
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V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
Configuration
MFM374
L1
L2
L3
K
M
AVG
TOT
E
Password for entering into configuration
Default Setting: 1000
Range: 0000 to 9998
Note: Password needed for getting into configuration menu. Only the person who knows the password can do the parameter setting
MFM374
L1
L2
L3
K
M
AVG
TOT
E
Change Password
Default Setting: No
Range: No / Yes
Note: If user want to change default password, make selection as ‘Yes’ and proceed.
If selection is ‘No’ then configuration will move on to the network selection page.
MFM374
L1
L2
L3
K
M
AVG
TOT
E
New Password
Default Setting: 0000
Range: 0000 To 9998
Note: After selecting ‘Yes’ on previous page, user can set new password
Use or keys for increasing or decreasing parameters value
Configuration
Configuration
04
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
VI
A / M
VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Network Selection
Default Setting: 3P4W
Range: 3P3W and 3P4W
Note: For 1Ø-2 wire / 2Ø-3 wire connection the network selection should be set to 3P4W and user can make the requisite hardwired connection at the terminals
05
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V L-L
W
Wh
A
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
CT Secondary
Default Setting: 5 A
Range: 1A or 5A
Note: User can select from 1A and 5A as per external CT specification
06
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
VI
A / M
VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
CT Primary
Default Setting: 5 A
Range: 1A, 5A to 10,000A (10.0 kA)
Note: As per CT secondary selection, CT primary will be 1A to 10000A or 5A to 10000A
(Programmable for all values)
Configuration
Configuration
07
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V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
PT Secondary
Default Setting: 350V
Range: 100V to 500V
Note: User can select from 100 to 500V as per external PT specification (Programmable for all values)
08
09
MFM374
L1
L2
L3
K
M
AVG
TOT
VI
A / M
VAF P
PRG
E
PT Primary
Default Setting: 350V
Range: 100V to 500kV
Note:
1) User can select PT primary value as per external
PT specifications (Programmable for all values)
2) PT values changes in step of 10 after 9999 and
display shows 10.00K and in steps of 100 after
99.99K
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
MFM374
L1
L2
L3
K
M
AVG
TOT
A / M
VI VAF P
PRG
E
Slave ID
Default Setting : 1
Range: 1 to 255
Note: Slave Id is for communication purpose.
Each meter on same RS485 network should have different address according to Modbus RTU protocol
Optional, available in MFM374-C only
24
Configuration
Configuration
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10
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF
P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Baud Rate
Default Setting: 9600.
Range: 300, 600, 1200, 2400, 4800, 9600 &
19200
Note: The baud rate could be one of the seven,
300, 600, 1200, 2400, 4800, 9600 & 19200
Optional, available in MFM374-C only
11
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Parity
Default Setting: None
Range: None, Even, Odd
Note: For asynchronous communication, user can select any one of three None, Even, Odd
Optional, available in MFM374-C only
12
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Stop Bit
Default Setting: 1
Range: 1 or 2
Note: For asynchronous communication, user can select any one from '1 or 2'
Optional, available in MFM374-C only
25
Configuration
Configuration
13
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V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
VI
A / M
VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Maximum Auto Page
Default Setting: 19
Range: 1 to 19
Note: User can select maximum number of pages being displayed on the unit in auto mode.
14
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Change Page Sequence
Default Setting: No
Range: No / Yes
Note: User can change page sequence by selecting ‘Yes’
If option selected is ‘No’ the configuration will move to factory default page.
15
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
A
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Page Sequence
Note: Page sequence depends on maximum page selection.
User will be prompted to change page sequence depending upon maximum page selection defined.
26
Configuration
Configuration
selec
16
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
VI
A / M
VAF
P
PRG
E
MFM374
L1
L2
L3
THD
K
M
AVG
TOT
Factory Default
Default Setting: No
Range: No / Yes
Note: If ‘Yes’ selected unit will be formatted to factory default settings.
User should note all previous settings before formatting the unit.
17
A
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
VI
A / M
VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Reset
Default Setting: No
Range: No / Yes
Note: For resetting energy parameters user has to select ‘Yes’ option
If option selected is ‘No’ the configuration will move to change password
18
V L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF
P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Password
Default Setting: 1001
Selection: 0000 To 9999
Note: For resetting energy parameters user will be prompted the password. If correct password is entered, the user will be able to reset all energy parameters. This password will be a value which will be greater than the configuration password by 1.
27
Configuration
Configuration
selec
19
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
VI
A / M
VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Reset Active Energy
Default Setting: No
Selection: No / Yes
Note: User can reset energy by selecting ‘Yes’.
User should note the reading before resetting
20
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Reset Reactive Energy
Default Setting: No
Selection: No / Yes
Note: User can reset energy by selecting ‘Yes’.
User should note the reading before resetting
21
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Reset Apparent Energy
Default Setting: No
Selection: No / Yes
Note: User can reset energy by selecting ‘Yes’.
User should note the reading before resetting.
After pressing enter key configuration will move on to change password page.
28
Application
Application of Pulse Output
! Process Integration
N
N
L
L
+ +
-
PULSE
O/P
-
RS485
MFM374
S1
I1
S2 S1
I2
S2 S1
I3
S2 N V1 V2 V3
! Energy Controller
N
N
L
L
+ +
-
PULSE
O/P
-
RS485
MFM374
S1
I1
S2 S1
I2
S2 S1
I3
S2 N V1 V2 V3 selec
Pulse output from MFM374 meter can be interfaced into a process through a PLC for on line control of energy content in the process.
If the PLC has a self excited 24V digital input, external 24V DC supply is not needed.
The kWh pulse is also used to derive average kWh information at the PLC.
24V DC
+
P
L
C
Pulse output from MFM374 meter can be used as alarm generator or total energy controller by interfacing it with presettable counter and control circuits
(Contactors, Relay, Trip Circuit).
The counter is loaded with the maximum energy consumption. When count reaches setpoint it provides output to control circuit to take appropriate action.
24V DC
+
+
To
Control
Circuit
29
Modbus parameter
MODBUS register addresses list
Readable parameters from MFM374:
Address Hex Address Parameter
30030
30032
30034
30036
30038
30040
30042
30014
30016
30018
30020
30022
30024
30026
30028
30044
30000
30002
30004
30006
30008
30010
30012
0x1C
0x1E
0x20
0x22
0x24
0x26
0x28
0x0C
0x0E
0x10
0x12
0x14
0x16
0x18
0x1A
0x2A
0x2C
0x00
0x02
0x04
0x06
0x08
0x0A
Voltage V1N
Voltage V2N
Voltage V3N
Average Voltage LN
Voltage V12
Voltage V23
Voltage V31 kW2 kW3 kVA1 kVA2 kVA3 kVAr1 kVAr2 kVAr3
Average Voltage LL
Current I1
Current I2
Current I3
Average Current kW1
Total kW
Total kVA
30 selec
Modbus parameter selec
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Length
(Register)
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Float
Data
Structure
Float
Float
Float
Float
Float
Float
31
Modbus parameter
MODBUS register addresses list
continued
Readable parameters from MFM384:
Address Hex Address
Address Hex Address
Parameter
30046
30048
30050
30052
30054
30056
30058
0x2E
0x30
0x32
0x34
0x36
0x38
0x3A
Total kVAr
PF1
PF2
PF3
Average PF
Frequency kWh
30060 0x3C kVAh
30062 0x3E kVArh
Readable / writable parameters from MFM374:
Parameter
40000
40001
0x00
0x01
Password
N/W selection
40002
40003
0x02
0x03
40004
40005
0x04
0x05
32
CT Secondary
CT primary (CT Secondary = 5)
CT primary (CT Secondary = 1)
PT Secondary
PT primary
selec
Modbus parameter
5
1
100
100
Min value
0
Value
0
1
Min Value
1
Range
9998
Meaning
Max value
3P-4W
3P-3W
Max Value
5
10000
10000
500
500kV
selec
1
2
1
1
1
1
2
2
2
2
2
2
2
2
Length
(Register)
2
Data
Structure
Float
Float
Float
Float
Float
Float
Float
Float
Float
Length
(Register)
Data
Structure
1
Integer
Integer
Integer
Integer
Integer
Integer
Integer
33
Modbus parameter
MODBUS register addresses list
continued
Readable parameters from MFM374
Address Hex Address Parameter
40007 0x07
40008 0x08
Slave Id
Baud rate
40009 0x09 Parity
40010 0x0A
40011 0x0B
34
40012
40013
40014
0x0C
0x0D
0x0E
Stop bit
Factory Default
Reset kWh
Reset kVAh
Reset kVArh
selec
Modbus parameter selec
0x0003
0x0004
0x0005
0x0006
Value
0x0000
0x0001
0x0002
Write Value
Min Value
1
Value
0x0000
0x0001
0x0002
Value
0x0000
0x0001
1
Value
1
1
1
Range
Meaning
Max Value
255
Meaning
300
600
1200
2400
4800
9600
19200
Meaning
None
Odd
Even
Meaning
1
2
Set to factory setting range
1
1
1
1
1
Meaning
Reset Total Active Energy
Reset Total Apparent Energy
Reset Total Reactive Energy
1
1
1
Length
(Register)
Data
Structure
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
35
40015 0x0F
40027
40028
40029
40030
40031
40032
40033
40034
40016
40017
40018
40019
40020
40021
40022
40023
40024
40025
40026
36
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
Modbus parameter
MODBUS register addresses list
continued
Readable parameters from MFM374
Address Hex Address Parameter
Auto Mode Pgs
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
Page Address Sequence
selec
Modbus parameter selec
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
1- 19
Write Value
Value
1
Page No
1- 19
1- 19
1- 19
Range
Meaning
19
Meaning
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1- First Page ; 19-Last Page
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Length
(Register)
Data
Structure
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
37
User Guide
Description of Parameter & Symbols
selec
1. VOLTAGE: True RMS value of three phase voltage, three line to line voltages and their average values are measured and displayed on MFM374.
2. CURRENT: True RMS value of three phase currents and their average are measured and displayed in MFM374.There is also Bar graph presentation for current in percentage form.
3. POWER FACTOR: Individual and average power factor displayed on MFM384
4. ACTIVE POWER (P): Three phase active power and system total active power are measured and displayed on MFM374.
5. REACTIVE POWER(Q): Three phase reactive power and total reactive power of the system are measured and displayed on MFM374.
6. APPARENT POWER (S): Three phase apparent power and total apparent power of the system are measured and displayed on MFM374.
7. FREQUENCY: The frequency of available voltage input is measured as system frequency.
8. ENERGY (kWh, kVArh, kVAh): Total Active, Reactive and Apparent energy of the system is measured and displayed on MFM 374.
9. PULSE O/P: DC pulse output is generated by the MFM374 which can be used to interface MFM384 with SCADA systems.
38
11
12
12.1
12.2
12.3
9
10
7
8
12.4
12.5
12.6
12.7
5
6
3
4
1
1.1
2
Configuration Record Sheet
Config page.
Function
Password
Change Password
New Password
Network Selection
CT Secondary
CT Primary
PT Secondary
PT primary
Slave Id
Baud Rate
Parity
Stop Bit
Max Page Auto
Change Page Sequence
Page sequence 1
Page sequence 2
Page sequence 3
Page sequence 4
Page sequence 5
Page sequence 6
Page sequence 7
Value or
Selection
19
No
1
2
3
001
9600
None
1
6
7
4
5
3P4W
5
00005
350
350
selec
Factory
Setting
1000
No
-
39
Configuration Record Sheet
Config page.
12.8
12.9
12.10
12.11
12.12
12.13
12.14
12.15
12.16
12.17
12.18
12.19
Function
Page sequence 8
Page sequence 9
Page sequence 10
Page sequence 11
Page sequence 12
Page sequence 13
Page sequence 14
Page sequence 15
Page sequence 16
Page sequence 17
Page sequence 18
Page sequence 19
Value or
Selection
16
17
18
19
12
13
14
15
selec
Factory
Setting
8
9
10
11
40
selec
Online Page Description
L-L
L-L
MFM374
L1
L2
L3
K
M
AVG
TOT
A / M
VI VAF P
PRG
E
Press P ( ) button, the eighth screen shows:
[ Total active, reactive, apparent power (Total kW, kVAr, kVA)
Note: In 3Ø-3 wire system only Total kW, kVA, kVAr will be displayed
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
MFM374
L1
L2
L3
K
M
AVG
TOT
P
PRG
E
Press E ( ) button, the first screen shows:
[ Total active energy (Total kWh)
Note: 1) There are 8 digit for energy
Energy will be displayed in 2 rows, 4 digits in each with lsb on middle row & msb on top row
Eg: if energy accumulated is 12345.6, top row will display 12 & middle row will display 345.6
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
A / M
VI VAF P
PRG
E
MFM374
L1
L2
L3
K
M
AVG
TOT
Press E ( ) button, the second screen shows:
[ Total reactive energy (Total kVArh)
Note: 1) There are 8 digit for energy
Energy will be displayed in 2 rows, 4 digits in each with lsb on middle row & msb on top row
Eg: if energy accumulated is 12345.6, top row will display 12 & middle row will display 345.6
Configuration
Online Page Description
19
X3
V
L-N
V
L-L
W
Wh
A
VAr
VArh
PF
Hz
VA
VAh
MFM374
L1
L2
L3
K
M
AVG
TOT
A / M
VI VAF P
PRG
E
Press E ( ) button, the third screen shows:
[ Total apparent energy (Total kVAh)
Note: 1) There are 8 digit for energy
Energy will be displayed in 2 rows, 4 digits in each with lsb on middle row & msb on top row
Eg: if energy accumulated is 12345.6, top row will display 12 & middle row will display 345.6
A/M
A
VAr
VArh
PF
Hz
VA
VAh
V
L-N
V
L-L
W
Wh
MFM374
L1
L2
L3
K
M
AVG
TOT
A / M
VI VAF P
PRG
E
Press VI ( ) button for 3 seconds to toggle between Auto & Manual mode.
Note: By default unit operates in auto mode.
In auto mode online pages scrolls automatically at the rate of 5 seconds per page.
In auto mode when any key is pressed, unit temporarily switches to manual mode and the page relevant to the key pressed is displayed, also if no key is pressed for 5 sec, unit resumes auto mode
Configuration
There are 4 dedicated keys labelled as VI, VAF, P, E. Use these 4 keys to enter/exit the configuration menu / change setting.
Note: The settings should be done by a professional, after going through this users manual and having understood the application situation.
For the configuration setting mode
! Use
+ keys for 3 sec to enter or exit from the configuration menu.
! Use or keys for increasing or decreasing parameters value
! Use
key to go back to previous page
! Use key to save the setting and move on to next page
23 21
Content
Operating / 1009 / MFM374 / Ver1, OP300-V01.
Selec Controls Pvt. Ltd., India,
Tel: 91-22-28471882 / 4039 4200 / 4039 4202
Tollfree: 1800 227 353 Fax: 91-22-28471733,
Website: www.selec.com
E- mail: [email protected]
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