POWERMETER
EPR-04 / EPR-04S
TECHNICAL DATA
Operating Voltage (Un) : Please look at the back labels on
the device
Operating frequency (f) : 45-65 Hz
Auxiliary supply Power Consumption : < 4 VA
Measuring Input Power Consumption : < 1VA
VIn : 10-300VAC 45-65Hz. (L-N)
: 10-500VAC 45-65Hz. (L-L)
IIn : 0.05 - 5.5 A~
Measuring Range
2-120 A ~ (for CT-25)
: 0...215 M(W,VAr,VA)
Measuring Category
Class
Voltage Transformer Ratio
Current Transformer Ratio
Max. Ctr x Vtr
Demand Time
Serial Interface (for EPM-04S)
: 999999999.999 kWh,kVArh
: CAT III
: 1±1digit [(%10-%110) xFull Scale]
: 0.1 ... 4000.0
: 1 ... 2000
: 40.000
: 1-60 min. (programmable)
: MODBUS RTU (RS 485)
: Optically Isolated, programmable
Baud Rate (for EPM-04S)
Address (for EPM-04S)
Parity (for EPM-04S)
Pulse Output
Switch Period
: 2400-38400 bps
: 1-247
: No , odd, Even, 8 Data Bits, 2 Stop Bits
: NPN Transistor
:
Min. 100 msec pulse perriod
80 msec pulse width
: Max. 50 mA
: 5.....24 V DC, max. 30 VDC
Operation Current
Operation Voltage
Input
Ambient Temprature
Display
Dimensions
Equipment Protection Class
Box Protection Class
Box Material
Installation
: 12...48 V DC
: -5°C; +50°C
: Red LED Display
: PR-19, PK-26
: Double Insulation-Class II ( )
: IP 40
: Non-flammable
: Panel Mounted (PR-19)
Rail Mounted (PK-26)
Wire Crossection (for terminal block) : 2.5 mm²
Weight
Installation Category
: 0.45 kg (PR-19, PK-26)
: Class III
Factory Settings
Trafo :
Ctr (Current Transformer Ratio) : 0001 trn (Turn number for CT-25 device): 01
Utr (Voltage Transformer Ratio) : 0001.0
CAL (Calculation Method) : 1
Eng Cnt :
E-1 (Energy Counter 1) : on
E-2 (Energy Counter 2) : on
Pin : 0000 (Not Activated)
PULSE : rAt ýo (Ratio) : 1k o-1 (Output 1) : A-I o-2 (Output 2) : r-L
RS-485 :
Adr (Address) : 1
Bau (Baud Rate) : 9600
PAr (Parity) : no
dEtý (Delay Time) : 15
PRECAUTIONS FOR INSTALLATION AND SAFE USE
In CT-25 (120A) compliant models, only CT-25 current transformer must be used.
Other type of CTs have a high risk to damage to device.
Failure to follow those instructions will result in death or serious injury.
- Disconnect all power before working on equipment..
- When the device is connected to the network, do not remove the front panel.
- Do not try to clean the device with solvent or the like.Only clean with dry cloth.
- Verify correct terminal connections when wiring.
- Electrical equipment should be serviced only by your component seller.
- Only for rack panel mounting.
No responsibility is assured by the manufacturer or any of its subsidiaries for any consequences arising out of the use of this material.
8
A3615/Rev.5
POWERMETER
EPR-04 / EPR-04S
General :
EPR-04/04S is a microprocessor based device which is developed for measuing the power and energy values in an Electrical Network. Measured parameters are displayed in 4 displays separately EPR-04S has an MODBUS serial communication interface.
ESC button
Max. LED
SET button
Minimum LED
Demand LED
Phase
Displays
Total Display UP button
DOWN button
Phase Displays
UP button
ESC button
Max. LED
SET button
Minimum LED
Demand LED
Total Display DOWN button
Using of EPR-04/04S:
Parameters (Cosj; W; VAr; VA; kWh, kVarh) are monitored in L1, L2, L3 displays by scrolling UP/DOWN buttons. Total Active (SW), Total Reactive
Power (SVAr), Total Apparent Power (SVA) and Cosj values and average values of these parameters are monitored in 4th display.
Digital Input
EPR-04/04S has 2 digital inputs. Digital inputs have 2 functions:
- When a remote device has activated, situation of this device which is conncected to the digital input, can be monitored according to data register
(Battery, thermostat, circuit breaker and motor position).
- Controlling energy counters and determining which energy counter will be active (Example: It is used for measuring of energy separately at the using of network and generator).
Energy Pulse Outputs
EPR-04/04S has 2 Energy Pulse Outputs. These outputs give the pulses only for E-1 (Energy Counter).
Pul1 and Pul2: In o-1 (Pulse1), o-2 (Pulse2) menus which are in the pulse menu, device give pulse according to selected energy parameters as [Active energy (ACt, A-I, A-E), Reactive energy (rEA, r-L, r-C)].
Please refer to the pulse menu for the coefficients of energies.
Monitoring of Min.,Max. and Max. Demand Values:
Min. and max. values are defined for W, VAr, VA, SW, SVAr, SVA; demand values are defined for W, VAr, VA, SW, SVA, SVAr.
If measured instant value is smaller than min. value which was stored before, it is stored as new min. value. If measured instant value is greater than max.
value which was stored before, it is stored as new max. value.
Demand value is the average value of the measured values in demand time
(15 minute).
If one of defined parameters is displayed (ie. W) when deman button is pressed min., max or max. demand values are displayed. When an undefined parameter is displayed (ie. Cosj) if demand button is pressed, instant value is continued to display.
H-L-M LEDs
H-L-M LEDs are dedicated to displaying the min., max. and max. demand values according to selected parameters.
H: Maximum Value, L: Minimum Value, M: Max. Demand Value
Calculation Methods for Active / Reactive Power Values
If the led on the most right side blinks it represents that active / reactive powers direction is inversed.
There are two methods for calculating total active and total reactive powers:
1) Active / Reactive power can be calculated by summing import and export values and displaying as a single value.
2) Active / Reactive power can be calculated according to direction as import / export.
Note :
1) The dot at the most right digit of the fourth display (During SW is displayed) represents that displayed value is export active power value.
Vice versa, displayed value is import active power value.
2) The dot at the most right digit of the fourth display (During SVAr is displayed) represents that displayed value is capacitive reactive power value. Vice versa, displayed value is inductive reactive power value.
3) The displayed parameter will not change if power is off after 30 seconds of stand-by (ie. W).
Measured Parameters:
Cosj
W (Active Power)
VAr (Reactive Power)
VA (Apparent Power)
AI ( kWh) (Import Active Energy)
AE (kWh) (Export Active Energy) rI (kVArh) (Import Reactive Energy) rE(kVArh) (Export Reactive Energy)
SW (Total Active Power)
SVAr (Total Reactive Power)
SVA (Total Apparent Power)
FUNCTIONS OF BUTTONS
When W led lights,it shows max.power values which are measured instantaneously and it shows total max demand values. Also it is used for moving upwards in the menu.
When W led lights,it shows min.power values which are measured instantaneously and it shows total demand values. Also it is used for moving downwards in the menu.
SET
It is used for passing between parameters such as W, Var, VA,
KWh, KVArh, cosj. When it is pressed for 3 second, adjustment mode is entered. In the adjustment mode it is used for saving parameters and moving to the sub menu.
ESC
In the adjustment mode, it is used for entering to the upper menu or it is used for quiting from the adjustment mode without saving the values.
If user password is activated and set button is pressed for
3 seconds, a pin code is required in order to enter to the menu.
Current Transformer Ratio Setup
(This menu is not available in the devices which are adapted with
CT-25.)
In this menu, current transformer ratio is set between 1 - 2000.
Note: If the current transformer is not used between the system and EPR-04/04S, current transformer ratio is entered as 1.
Example: If a current transformer which has a ratio of 250/5A is used between the system and EPR-04/04S; Current transformer ratio is entered as 50 (250/5).
Press SET button for 3 seconds (trA Fo menu is displayed)
Press SET button; trA Fo Ctr menu is displayed (In CT-25 adapted devices, trA Fo trn is displayed instead.)
(Not: trA Fo Utr menu can be displayed by scrolling the UP/DOWN buttons.)
Press SET button. Blinking the first digit of displayed value appears. (trA Fo
Utr menu can be programmed similarly.)
Enter the blinking digit value by scrolling UP/DOWN buttons.
Switch to the other digits by using SET button, use ESC button to go to previous digit. After you entered the last digit press SET button, trA Fo Ctr / trA Fo trn / trA Fo Utr is displayed. on can be selected by scrolling UP/DOWN buttons. (Data is entered but is not activated yet. For activating the new data please follow the below steps).
Press ESC button one by one until SAU E SEt yES is displayed.
Press SET button. When SAU E SEt yES is displayed, if you press
ESC button or choose no option instead of yES option by using
UP-DOWN buttons, new data will be cancelled and previous value will be activated.
1
POWERMETER
EPR-04 / EPR-04S
Programming the Turn Number:
This menu is available for CT-25 adapted devices. User enter the turn number, which is the number of how many tour the current cable has rounded into the CT-25. Numbers can be selected between 1-20. Greater the number of turn means greater the sensivity.
Demand Time Setup:
In this menu, demand time is set between 1-60 minutes.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
2.00
1.00
0.66
0.50
0.40
0.33
0.28
0.24
0.22
0.20
0.18
0.16
0.15
0.14
0.13
0.12
0.11
0.11
0.10
0.10
120 60.0
40.0
30.0
24.0
20.0
17.1
15.0
13.3
12.0
10.9
10.0
9.23
8.57
8.00
7.50
7.05
6.66
6.31
6.00
Voltage Transformer Ratio Setup
In this menu, voltage transformer ratio is set between
0000,1 - 4000,0.
Note: If the voltage transformer is not used between the system and EPR-04/04S, voltage transformer ratio is entered as 1.
Example: If a voltage transformer which has a ratio of 34.5KV/100V is used between the system and EPR-04/04S; Voltage transformer ratio is entered as 345. (34500/100)
Reactive Energy Calculation Method Setting
Three different methods exist for reactive energy calculation in
EPR-04/04S. Brief informations about these methods are explained in below table.
Related values which must be entered in the menu are also indicated in the table in order to select reactive power calculation method for mechanical and digital energymeters.
Mechanical Energymeter
(Vectoral summation of 3-phase)
Digital Energymeter
(Each phase seperately)
Reactive Energy
(Q)
0 1
Description
90° rotation of voltage vector and multiply with current
It is the most preferred reactive power calculation methode.
4
2 3
5
¥
S V n
.I
n
.sin(j n
) n=1
Total value of the multiplication of Vn and In values up to 19 th harmonics. This calculation methode is mostly preferred for network analysers.
S 2 -P 2
Power Triangle Methode : According to this methode;
Q = S 2 -P 2
(Q : Reactive power, S : Active power, P : Apparent power)
SET Press SET button for 3 seconds (trA Fo menu is displayed)
SET Press SET button (trAFo Ctr menu is displayed)
By using UP-DOWN buttons, find CAL CLt menu.
SET
Press SET button (Calculation value 1 blinks)
By using UP-DOWN buttons, select energy calculation method.
SET
Press set button, CAL CLt is displayed. (Data is entered but is not activated yet. For activating the new data please follow the below steps.
ESC
Press ESC button one by one until SAUE SEt yES is displayed.
SET
Press SET button. When SAUE SEt yES is displayed, if you press ESC button or choose no option instead of yES option by using UP-DOWN buttons, new data will be cancelled and previous value will be activated.
Press SET button for 3 seconds (trA Fo menu is displayed)
By using UP-DOWN buttons find dE tý menu.
Press SET button (First digit blinks.)
By using UP-DOWN buttons, enter the value to the first digit.
Press SET button (Second digit blinks)
By using UP-DOWN buttons, enter the value to the second digit.
Press SET button, dE tý is displayed. (Data is entered but is not activated yet. For activating the new data please follow the below steps).
Press ESC button one by one until (SAU E SEt yES) is displayed.
Press SET button. When SAU E SEt yES is displayed, if you press
ESC button or choose no option instead of yES option by using
UP-DOWN buttons, new data will be cancelled and previous value will be activated.
Monitoring and Erasing of minimum and maximum values:
In this menu, values of min., max., demand or energymeters are erased. It saves the instantaneously measured min. and max. values of EPR-04/04S into its memory. Please kindly look at to the section of FUNCTIONS OF BUTTONS for min. and max. values.
Note: Measured electrical parameters which are saved to the memory are not affected from the electric interruptions.
In the rES Et dE E-1 / E-2 menu; when you choose yES and quit from all menus, if you confirm the changes, min. and max. values of all parameters or values of energymeters are erased at the same time. Follow the below steps in order
to erasing the values of min., max., E-1 and E-2; In the measurement position.
SET Press SET button 3 seconds (trA Fo menu is displayed)
SET
SET
ESC
SET
By using the UP-DOWN buttons find the rES Et menu.
Press SET button.(rES Et HL menu is displayed)
By using the UP-DOWN buttons, other parameters can be selected.
If you want to delete the value, choose yEs, if not choose no.
Press SET button, (Data is entered but is not activated yet.
For activating the new data please follow the below steps).
Press ESC button one by one until SAUE SEt yES is displayed.
Press SET button. When SAUE SEt yES is displayed, if you press
ESC button or choose no option instead of yES option by using
UP-DOWN buttons, new data will be cancelled and previous value will be activated.
2
POWERMETER
EPR-04 / EPR-04S
PK 26 Box Connection Diagram
Max: 30 VDC
(12-48V DC)
- + - +
Gnd A B
RS-485
TR
Auxiliary
Supply
Voltage Measuring Input Current Measuring Input
L1 L2 L3 N
I
L1
I
L2
I
L3
1A
L1
L2
L3
N
3 Phase neutral k
K l
L k
K l
L k
K l
L
Max: 30 VDC
(12-48V DC)
- + - +
L1
L2
L3
1A
Auxiliary
Supply
Un
~
Voltage Measuring Input Current Measuring Input
L1 L2 L3 N
I
L1
I
L2
I
L3
N
Gnd A B
RS-485
TR k
K l
L k
K l
L k
K L l
3 Phase without neutral
*Available only for EPR-04S
Note: For CT-25 models: k: When CT-25 is used, Red cable is connected to k terminal.
l: When CT-25 is used, Black cable is connected to l terminal.
Max: 30 VDC
(12-48V DC)
- + - +
Gnd A B
RS-485
TR
Auxiliary
Supply
Voltage Measuring Input Current Measuring Input
L1 L2 L3 N
I
L1
I
L2
I
L3
1A N
L1
L2
L3 k
K
3 Phase without neutral current input with
Aron wiring configuration l
L k
K l
L
7
Max: 30 VDC
(12-48V DC)
- + - +
Gnd A B
RS-485
TR
Auxiliary
Supply
Un
~
Voltage Measuring Input Current Measuring Input
L1 L2 L3 N
I
L1
I
L2
I
L3
N
1A
L1
L2 k
K
L3
3 Phase without neutral current input with
Aron wiring configuration
L l k
K L l
POWERMETER
EPR-04 / EPR-04S
PR 19 Box Connection Diagram
L1
L2
L3
N
3 Phase neutral k
K L l k
K L l k
K
Max: 30 VDC
_
+
1
I
L1
2 3 4 5
I
L2
Current Measuring Input
I
L3
6
7
L1
Pul C
( 12-48V DC )
InC In1 In2
13 14 15 16 17 18
RS485
19 20 21 22
GND B A TR
Pul 1 Pul 2
Voltage Measuring Input
L2
8
L3
9
N
10
Auxiliary
Supply
11 12
L l
L1
N
L1
L2
L3 k
K L l k
K L l
Max: 30 VDC
_
+
1
I
L1
2 3 4 5
I
L2
Current Measuring Input
I
L3
6
Pul C
( 12-48V DC )
InC In1 In2
13 14 15 16 17 18
RS485
19 20 21 22
GND B A TR
Pul 1 Pul 2
7
L1
Voltage Measuring Input
L2
8
L3
9
N
10
Auxiliary
Supply
11 12
3 Phase without neutral current input with
Aron wiring configuration
L1
N
L1
L2
L3 k
K L l k
K L l k
K
Max: 30 VDC
_
+
1
I
L1
2 3 4 5
I
L2
Current Measuring Input
I
L3
6
7
L1
Pul C
( 12-48V DC )
InC In1 In2
13 14 15 16 17 18
RS485
19 20 21 22
GND B A TR
Pul 1 Pul 2
Voltage Measuring Input
L2
8
L3
9
N
10
Auxiliary
Supply
11 12
L l
3 Phase without neutral
*Available only for EPR-04S
Note: For CT-25 models: k: When CT-25 is used, Red cable is connected to k terminal.
l: When CT-25 is used, Black cable is connected to l terminal.
L1
N
L1
L2
L3 k
K L l k
K L l
Max: 30 VDC
_
+
1
I
L1
2 3 4 5
I
L2
Current Measuring Input
I
L3
6
L1
7
Pul C
( 12-48V DC )
InC In1 In2
13 14 15 16 17 18
RS485
19 20 21 22
GND B A TR
Pul 1 Pul 2
Voltage Measuring Input
L2
8
L3
9
N
10
Auxiliary
Supply
11 12
L1
N
3 Phase without neutral current input with
Aron wiring configuration
6
POWERMETER
EPR-04 / EPR-04S
Pulse Menu
In this menu, three parameters can be selected : PUL SE rAt,
PUL SE o-1, PUL SE o-2
PUL SE rAt ýo : Pulse ratio can be set as :
1, 10, 100 (wh/VArh/VA); 1, 10, 100 (kwh/kVArh/kVA);
1 Mwh/MVArh/MVA.
PUL SE o-1 : If this parameter is selected, in every increase in output 1, one pulse is counted. Output 1 parameter can be set as :
ACt (Export/Import), A-I (Active Import), A-E (Active Export), rEA (Inductive
/ Capacitive), r-L (Reactive Inductive), r-C (Reactive Capacitive).
PUL SE o-2 : If this parameter is selected, in every increase in output 2, one pulse is counted. Output 2 parameter can be set as :
ACt (Export/Import), A-I (Active Import), A-E (Active Export), rEA (Inductive
/ Capacitive), r-L (Reactive Inductive), r-C (Reactive Capacitive).
SET Press SET button for 3 seconds (trA Fo menu is displayed)
By using UP-DOWN buttons, find PULSE menu.
SET Press SET button (PUL SE rAt menu is displayed)
By using UP-DOWN buttons, select PUL SE rAt,
PUL SE o-1 or PUL SE o-2.
Press SET button.
SET
By using UP-DOWN buttons, type the required value for selected parameter.
SET
Press SET button, (Data is entered but is not activated yet.
For activating the new data please follow the below steps).
ESC
Press ESC button one by one until SAU E SEt yES is displayed.
SET
Press SET button. When SAU E SEt yES is displayed, if you press ESC button or choose no option instead of yES option by using UP-DOWN buttons, new data will be cancelled and previous value will be activated.
Energy Counter (Eng Cnt) Menu
EPR-04/04S has 2 energy counters :
Energy counter 1 (E-1), Energy counter 2 (E-2).
E-1 / E-2 have 4 parameters : on : Activate E-1 / E-2 counters for energy counting without depending on any parameter.
ý-1 : Activate E-1 / E-2 counters, when digital input 1 is on (=1).
ý-2 : Activate E-1 / E-2 counters, when digital input 2 is on (=1).
E-2: E-1 does not count when E-2 is activated. (Only for E-1)
E-1: E-2 does not count when E-1 is activated. (Only for E-2)
Note: Counting status is undefned if E-2 is selected on E-1 and if E-1 is selected on E-2.
When the status is defined as above, both energy counters count while digital input is not on (=1), but if either one or both digital inputs are on (=1) then counters will not count.
SET Press SET button for 3 seconds (trA Fo menu is displayed)
By using UP-DOWN buttons, find Eng Cnt menu.
SET Press SET button (Eng Cnt E-1 menu is displayed)
By using UP-DOWN buttons, select E-1 or E-2.
SET Press SET button.
By using UP-DOWN buttons, select on, ý-1, ý-2 or E-1 / E-2.
SET
ESC
SET
Press SET button, (Data is entered but is not activated yet.
For activating the new data please follow the below steps).
Press ESC button one by one until SAUE SEt yES is displayed.
Press SET button. When SAUE SEt yES is displayed, if you press ESC button or choose no option instead of yES option by using UP-DOWN buttons, new data will be cancelled and previous value will be activated.
3
User password Setup:
In this menu user password is defined and activated.
You must define and activate a 4 digit user password for preventing device settings from the illegal usage.
There are 2 sub menu under the Pýn menu.
Changing of User Password:
This menu is used for changing the user password .
Note: Factory default value for user password is 0000
SET
SET
For changing the user password;In the measurement mode,
Press SET button 3 seconds
(trA Fo menu is displayed)
Bu using UP-DOWN buttons find Pýn menu.
Press SET button (Pýn ACt ýUA tE menu is displayed.)
By using the UP-DOWN buttons find Pýn CHA ngE menu.
SET
By using UP-DOWN-SET button enter the old password
SET
By using UP-DOWN-SET button enter the new password
SET
ESC
SET
SET
By using UP-DOWN-SET button reenter the new password.
Press SET button, Pýn CHA ngE is displayed. Data is entered but is not activated yet. For activating the new data please follow the below steps).
Press ESC button one by one until (SAU SEt yES) appears at the display.
Press SET button when (SAU SEt yES) appears at the display. (When
SAU SEt yES appears at the display,If you Press ESC button or choose no option instead of yES option, you quit from adjustment menu without saving new settings and device continues to work with previous settings.
Activating the user password:
This menu is used for activating the user password.
After the user password is activated, while the instant values are observed,user password is required in order to enter to the menu. If the wrong user password is entered, user can not enter to the menu.
Note: Factory default value of user password is 0000
Press SET button for 3 seconds (trA Fo menu is displayed)
Bu using UP-DOWN buttons, find Pýn menu.
Press SET button (Pýn ACt IUA tE menu is displayed)
Press SET button. First digit of the displayed value is blinking.
Enter the blinking digit value by scrolling UP/DOWN buttons.
Switch to the other digits by using SET button, use ESC button to go to previous digit. After you entered the last digit press SET button, Pýn ACt oF is displayed. on can be selected by scrolling UP/DOWN buttons. (Data is entered but is not activated yet. For activating the new data please follow the below steps).
Press ESC button one by one until SAU E SEt yES is displayed.
Press SET button. When SAU E SEt yES is displayed, if you press ESC button or choose no option instead of yES option by using UP-DOWN buttons, new data will be cancelled and previous value will be activated.
POWERMETER
EPR-04 / EPR-04S
Serial Communication (Available only for EPR-04S)
EPR-04S has MODBUS RTU communication protocol which is optical isolated. All measured parameters can be transfer to the computer.
Transformer ratios and communication parameters can be set. Saved demand and energy values can be reset.
Parameter Settings
Address Parameters : Value can be enter between 001-247.
Baud Rate Parameters : Value can be selected as 2400, 4800, 9600,
19200 and 38400 bps.
Parity Parameters : no, odd and EUEn can be selected.
Press SET button for 3 seconds (trA Fo menu is displayed)
Bu using UP-DOWN buttons, find RS-485 menu.
Press SET button (Adr ESS menu is displayed)
Find the menu which is programmed in Adr ESS / bAU d / PArýty menus by scrolling UP-DOWN buttons.
Press SET button (001 / 9600 / no is displayed.)
Enter the value of related parameters by scrolling UP/DOWN buttons (001...247 / 2400...38400 /no, EUEn, odd).
Press SET button, Adr ESS / bAU d / PArýty is displayed. (Data is entered but is not activated yet. For activating the new data please follow the below steps).
Press ESC button one by one until SAU E SEt yES is displayed.
Press SET button. When SAU E SEt yES is displayed, if you press ESC button or choose no option instead of yES option by using UP-DOWN buttons, new data will be cancelled and previous value will be activated.
MODBUS RTU PROTOCOL (Available only for EPR-04S)
Standart MODBUS RTU message is shown below.
T
ADDRESS
8 BIT
FUNCTION
8 BIT
DATA
NX8BIT
CRCH CRCL T
The T times corresponds to a time in which data must not be exchanged on the communication bus to allow the connected devices to recognize the end of one message and the beginning of another. This time must be at least 3.5 characters at the selected baud rate. Adress range (1-247 ) is address of the connected device. The data field contains data sent to the slave by master or data sent to master by slave.
CRC is a error check method by using MODBUS RTU protocol and consists of 2 bytes.
Available Modbus Function:
03H READ HOLD REGISTERS
06H PRESET SINGLE REGISTER
10H PRESET MULTIPLE REGISTERS
Read Hold (03) function is used for reading measured values and set value. If any request of reading of a register, excepted mentioned in register table, device will send an error message. For example to read phase1 voltage by sending a message to the device.
01 03 00 00 00 02 XX XX
01 Device address
03 Function
00 MSB address
14 LSB address
00 Register number MSB
02 Register number LSB
XX CRC MSB
XX CRC LSB
Preset Single Register (06) function is used for writting the setting values, erasing the energy counter or resetting the min., max., demand values.
Current transformers ratio can be set 0-2000, voltage transformer ratio can be set 1-40000. Min., Max. and Demand values can be only clear. If sent value is outside of this range device responds with an error message.
i.e. Setting CT as 100;
01 06 80 02 00 64 XX XX
01 Device address
06 Function
80 MSB address
02 LSB address
00 Data MSB
64 Data LSB
XX CRC MSB
XX CRC LSB
Preset Multiple Register(10H) is used to set more then one register at same time.
i.e. Setting CT as 100, Ut as 20.0;
01 10 80 00 00 02 04 00 C8 00 64 XX XX
01 Device Address
10 Function
80 MSB address
00 LSB address
00 Register number MSB
02 Register number LSB
04 Byte count
00 Data MSB
C8 Data LSB
00 Data MSB
64 Data LSB
XX CRC MSB
XX CRC LSB
Digital Inputs (Available only for EPM-04S)
Digital input are sent in 16 bit hexadecimal format as below:
55H 15
U U U U U U
MSB
(Most Significant Byte)
U: undefined
U U U U U U U U
LSB
(Least Significant Byte)
1
DIN2 input 2
0
DIN1 input 1
If 12-48 V AC / DC is applied to ln1 (Input 1), 0 (zero) bit of DIN register is set as 1. Otherwise, 0 (zero) bit is set as 0.
If 12-48 V AC / DC is applied to ln2 (Input 2), 1st bit of DIN register is set as 1. Otherwise, 1st bit is set as 0.
The Parameters are sent in 32bit Hexadecimal format. For Example, 230.0V
voltage will be sent as 000008FCH. Cosj values shall be divided to 1000.
0.980 Cosj will be sent as 000003D4H. Energy values are sent in 64 bytes.
1234567890123456789 Wh = AB 54 A9 8C EB 1F 0A D2 Wh
Specifications for data cable;
- 24 AWG or thicker
- Less than 100 ohm/ km
- Nominal characteristic impedance at 100 kHz of 100 ohms
- Less than 60 pF/m mutual capacitance (between two wires in a pair)
- Less than 120 pF/m mutual pair capacitance ( the capacitance between one wire and all others connected to earth).
- Twisted Pair
ERROR CODES (Available only for EPR-04S)
Slave device (EPR-04S) sends error message when receive any missing query.
Error codes are given below.
01 Invalid Function: If any message except given above is used, then 01 error messages will be sent.
02 Invalid Register: Error 02 will be send when a reading of a register is requested, except the registers which mentioned in table.
03 Invalid data: If any different value is been set for dedicated Transformer values and nonzero for demand value, then error message 03 will be sent.
POWERMETER
EPR-04 / EPR-04S
EPM-04S COMPUTER CONNECTION
31 DEVICES CAN BE CONNECTED AT THE SAME LINE
MAX. 1200 mt.
RS485/RS232
CONVERTER
B
A
GND
TR B A GND ...
EPM-04S-31
TR B A GND
EPM-04S-2
TR B A GND
EPM-04S-1
MAX. 247 DEVICES CAN BE CONNECTED AT SAME LINE BY USING REPEATER.
MAX. 1200 mt.
MAX. 1200 mt.
PC
RS485/RS232
CONVERTER
B
A
GND
PC
TR B A GND ...
EPM-04S-247 EPM-04S-31
...
EPM-04S-2 EPM-04S-1 REPEATER
Dimensions
10.8
30.1
7.6
9.5
79.3mm
70mm
60.6
26.5
21.5
53.0
58.0
10.0
106.0
Type PK-26
96mm
Type PR 19 (96x96)
4 5
