Entes EPR-04 Instruction manual

POWERMETER
EPR-04 / EPR-04S
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.
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
SET
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.
1
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 Cosjvalues and average
values of these parameters are monitored in 4th display.
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
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.
Measured Parameters:
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).
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.
CosjAI ( kWh) (Import Active Energy) S W (Total Active Power)
W (Active Power) AE (kWh) (Export Active Energy) S VAr (Total Reactive Power)
VAr (Reactive Power) rI (kVArh) (Import Reactive Energy)
S VA (Total Apparent Power)
VA (Apparent Power) rE(kVArh) (Export Reactive Energy)
(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.
Current Transformer Ratio Setup
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; 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 SET button for 3 seconds (trA Fo menu is displayed)
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.
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.
A3615/Rev.5
8
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~
2-120 A ~ (for CT-25)
Measuring Range :
0...215 M(W,VAr,VA)
: 999999999.999 kWh,kVArh
Measuring Category : CAT III
Class : 1±1digit [(%10-%110) xFull Scale]
Voltage Transformer Ratio : 0.1 ... 4000.0
Current Transformer Ratio : 1 ... 2000
Max. Ctr x Vtr : 40.000
Demand Time : 1-60 min. (programmable)
Serial Interface (for EPM-04S) : MODBUS RTU (RS 485)
: Optically Isolated, programmable
Baud Rate (for EPM-04S) : 2400-38400 bps
Address (for EPM-04S) : 1-247
Parity (for EPM-04S) : No , odd, Even, 8 Data Bits, 2 Stop Bits
Pulse Output : NPN Transistor
Switch Period : Min. 100 msec pulse perriod
80 msec pulse width
Operation Current : Max. 50 mA
Operation Voltage : 5.....24 V DC, max. 30 VDC
Input : 12...48 V DC
Ambient Temprature : -5°C; +50°C
Display : Red LED Display
Dimensions : PR-19, PK-26
Equipment Protection Class : Double Insulation-Class II ( )
Box Protection Class : IP 40
Box Material : Non-flammable
Installation : Panel Mounted (PR-19)
Rail Mounted (PK-26)
Wire Crossection (for terminal block) : 2.5 mm²
Weight : 0.45 kg (PR-19, PK-26)
Installation Category : Class III
Trafo :
Ctr (Current Transformer Ratio) : 0001
trn (Turn number for CT-25 device): 01
Utr (Voltage Transformer Ratio) : 0001.0
CAL (Calculation Method) : 1
Pin : 0000 (Not Activated)
RS-485 :
Adr (Address) : 1
Bau (Baud Rate) : 9600
PAr (Parity) : no
Eng Cnt :
E-1 (Energy Counter 1) : on
E-2 (Energy Counter 2) : on
PULSE :
rAt ýo (Ratio) : 1k
o-1 (Output 1) : A-I
o-2 (Output 2) : r-L
dEtý (Delay Time) : 15
Factory Settings
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.
PRECAUTIONS FOR INSTALLATION AND SAFE USE
Calculation Methods for Active / Reactive Power Values
If the led on the most right side blinks it represents that active / reactive
powers 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).
Phase
Displays
Total Display
SET button
Max. LED
Minimum LED
Demand LED
ESC button
UP
button
DOWN
button
In CT-25 (120A) compliant models, only CT-25 current transformer must be used.
Other type of CTs have a high risk to damage to device.
No responsibility is assured by the manufacturer or any of its subsidiaries
for any consequences arising out of the use of this material.
Total Display
SET button
Max. LED
Phase Displays
UP button
DOWN button
Minimum LED
Demand LED
ESC button

POWERMETER
EPR-04 / EPR-04S
7
POWERMETER
EPR-04 / EPR-04S
2
Reactive Energy Calculation Method Setting
Press SET button for 3 seconds (trA Fo menu is displayed)
Press SET button (trAFo Ctr menu is displayed)
Press SET button (Calculation value 1 blinks)
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.
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.
By using UP-DOWN buttons, find CAL CLt menu.
By using UP-DOWN buttons, select energy calculation method.
ESC
SET
SET
SET
SET
SET
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)
In this menu, demand time is set between 1-60 minutes.
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 ESEt 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.
Press SET button 3 seconds (trA Fo menu is displayed)
By using the UP-DOWN buttons
find the rES Et menu.
Press SET button.(rES Et HL menu
is displayed)
Press SET button, (Data is entered
but is not activated yet.
For activating the new data please follow the below steps).
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.
By using the UP-DOWN buttons,
other parameters can be selected.
If you want to delete the value,
choose yEs, if not choose no.
Monitoring and Erasing of minimum and maximum values:
In this menu, values of min., max., demand or energymeters 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.
SET
ESC
SET
SET
SET
Press ESC button one by one until SAUE SEt yES is displayed.
Programming the Turn Number:
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)
Voltage Transformer Ratio Setup
In this menu, voltage transformer ratio is set between
0000,1 - 4000,0.
Demand Time Setup:
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.
0
2
4
1
3
5
Description
It is the most preferred reactive power calculation
methode.
Total value of the multiplication of Vnand Invalues up
to 19 th harmonics. This calculation methode is mostly
preferred for network analysers.
S Vn.In.sin(jn)
n=1
¥
Reactive Energy
(Q)
Digital Energymeter
(Each phase seperately)
Mechanical Energymeter
(Vectoral summation of 3-phase)
90° rotation of
voltage vector and
multiply with current
S2-P2
S
2
-P
2
Power Triangle Methode : According to this methode;
Q =
(Q : Reactive power, S : Active power, P : Apparent power)
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.
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.
PK 26 Box Connection Diagram
*Available only for EPR-04S
~
Un
TRA BGnd
IN2H IN2L IN1H IN1L PUL2H PUL2L PUL1H PUL1L
IL3
IL2 IL1
+
_
L3
L2
L1
1A
- + - +
(12-48V DC)
kl
K L
kl
K L
kl
K L
~
Un
TRA BGnd
IN2H IN2L IN1H IN1L PUL2H PUL2L PUL1H PUL1L
IL3
IL2 IL1
+
_
Max: 30 VDC
L3
L2
L1
- + - +
(12-48V DC)
1A
kl
K L
kl
K L
~
Un
TRA BGnd
IN2H IN2L IN1H IN1L PUL2H PUL2L PUL1H PUL1L
IL3
IL2 IL1
+
_
Max: 30 VDC
L3
L2
L1
1A
- + - +
(12-48V DC)
kl
K L
kl
K L
~
Un
TRA BGnd
IN2H IN2L IN1H IN1L PUL2H PUL2L PUL1H PUL1L
IL3
IL2 IL1
+
_
Max: 30 VDC
N
L3
L2
L1
1A
- + - +
(12-48V DC)
kl
K L
kl
K L
kl
K L
Auxiliary
Supply Voltage Measuring Input Current Measuring Input
3 Phase neutral
L1 L2 L3 N
RS-485
1
2.00
120
2
1.00
60.0
3
0.66
40.0
4
0.50
30.0
5
0.40
24.0
6
0.33
20.0
7
0.28
17.1
8
0.24
15.0
9
0.22
13.3
10
0.20
12.0
11
0.18
10.9
12
0.16
10.0
13
0.15
9.23
14
0.14
8.57
15
0.13
8.00
16
0.12
7.50
17
0.11
7.05
18
0.11
6.66
19
0.10
6.31
20
0.10
6.00
Note: For CT-25 models:
Auxiliary
Supply Voltage Measuring Input Current Measuring Input
3 Phase without neutral current input with
Aron wiring configuration
L1 L2 L3 N
RS-485
N
Auxiliary
Supply Voltage Measuring Input Current Measuring Input
3 Phase without neutral
L1 L2 L3 N
RS-485
N
Max: 30 VDC
Auxiliary
Supply Voltage Measuring Input Current Measuring Input
3 Phase without neutral current input with
Aron wiring configuration
L1 L2 L3 N
RS-485
N
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.

3
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.
This menu is used for changing the user password .
Note: Factory default value for user password is 0000
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.
User password Setup:
Changing of User Password:
By using UP-DOWN-SET
button enter the new
password
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.
By using UP-DOWN-SET button enter the old password
ESC
SET
SET
SET
SET
SET
SET
SET
Press SET button for 3 seconds (trA Fo menu is displayed)
By using UP-DOWN buttons, find Eng Cnt menu.
Press SET button (Eng Cnt E-1 menu is displayed)
SET
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.
By using UP-DOWN buttons, select E-1 or E-2.
Press SET button.
SET
ESC
SET
SET
Activating the user password:
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.
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).
POWERMETER
EPR-04 / EPR-04S
6
POWERMETER
EPR-04 / EPR-04S
Press SET button for 3 seconds (trA Fo menu is displayed)
By using UP-DOWN buttons, select PUL SE rAt,
PUL SE o-1 or PUL SE o-2.
Press SET button.
By using UP-DOWN buttons, find PULSE menu.
Pulse Menu
Press SET button (PUL SE rAt menu is displayed)
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 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.
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.
SET
ESC
SET
SET
SET
SET
By using UP-DOWN buttons, type the required value for
selected parameter.
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.
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).
By using UP-DOWN buttons, select on, ý-1, ý-2 or E-1 / E-2.
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
+
_
N
L1
L2
L3
1 A
L1
N
Current Measuring Input
Auxiliary
Supply
L1 L2 L3 N
1 2 3 4 5 6
Voltage Measuring Input
kl
K L
kl
K L
kl
K L
IL1 IL2 IL3
RS485
GND ATR
Max: 30 VDC
Pul 1 Pul 2
Pul C InC In1 In2
B
( 12-48V DC )
13 14 15 16 17 18 19 20 21 22
78 9 10 11 12
3 Phase neutral
+
_
+
_
L1
L2
L3
1 A
L1
N
Current Measuring Input
Auxiliary
Supply
L1 L2 L3 N
1 2 3 4 5 6
Voltage Measuring Input
kl
K L
kl
K L
IL1 IL2 IL3
RS485
GND ATR
Max: 30 VDC
Pul 1 Pul 2
Pul C InC In1 In2
B
( 12-48V DC )
13 14 15 16 17 18 19 20 21 22
78 9 10 11 12
3 Phase without neutral current input with
Aron wiring configuration
+
_
L1
L2
L3
kl
K L
kl
K L
1 A
L1
N
Current Measuring Input
Auxiliary
Supply
L1 L2 L3 N
1 2 3 4 5 6
Voltage Measuring Input
IL1 IL2 IL3
RS485
GND ATR
Max: 30 VDC
Pul 1 Pul 2
Pul C InC In1 In2
B
( 12-48V DC )
13 14 15 16 17 18 19 20 21 22
78 9 10 11 12
3 Phase without neutral current input with
Aron wiring configuration
*Available only for EPR-04S
Note: For CT-25 models:
PR 19 Box Connection Diagram
3 Phase without neutral
L1
L2
L3
1 A
L1
N
kl
K L
kl
K L
kl
K L
Current Measuring Input
Auxiliary
Supply
L1 L2 L3 N
1 2 3 4 5 6
Voltage Measuring Input
IL1 IL2 IL3
RS485
GND ATR
Max: 30 VDC
Pul 1 Pul 2
Pul C InC In1 In2
B
( 12-48V DC )
13 14 15 16 17 18 19 20 21 22
78 9 10 11 12
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.

POWERMETER
EPR-04 / EPR-04S
5
EPM-04S COMPUTER CONNECTION
Dimensions
Type PK-26
60.6
106.0
58.0
53.0
26.5 21.5 10.0
45.0 8.5
14.0
90.0
7.6 9.530.110.8
Type PR 19 (96x96)
70mm
79.3mm
90mm
96mm
96mm
31 DEVICES CAN BE CONNECTED AT THE SAME LINE
GNDTR B A GNDTR B A
GNDTR B A
GND
B
A
RS485/RS232
CONVERTER
PC
...
EPM-04S-1EPM-04S-2EPM-04S-31
MAX. 1200 mt.
MAX. 247 DEVICES CAN BE CONNECTED AT SAME LINE BY USING REPEATER.
GND
TR BA
...
EPM-04S-247
GND
B
A
RS485/RS232
CONVERTER
PC
...
EPM-04S-1EPM-04S-2EPM-04S-31
REPEATER
MAX. 1200 mt. MAX. 1200 mt.
POWERMETER
EPR-04 / EPR-04S
4
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.
Digital input are sent in 16 bit hexadecimal format as below:
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. Cosjvalues shall be divided to 1000.
0.980 Cosjwill be sent as 000003D4H. Energy values are sent in 64 bytes.
1234567890123456789 Wh = AB 54 A9 8C EB 1F 0A D2 Wh
Digital Inputs (Available only for EPM-04S)
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
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
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.
MODBUS RTU PROTOCOL (Available only for EPR-04S)
Standart MODBUS RTU message is shown below.
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.
Bu using UP-DOWN buttons,
find RS-485 menu.
Press SET button (
Adr ESS  menu is displayed)
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.
Find the menu which is programmed in Adr ESS / bAU d / PArýty
menus by scrolling
UP-DOWN buttons.
Press SET button for 3 seconds (trA Fo menu is displayed)
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
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.
Available Modbus Function:
TADDRESS
8 BIT
FUNCTION
8 BIT
DATA
NX8BIT CRCH CRCL T
03H READ HOLD REGISTERS
06H PRESET SINGLE REGISTER
10H PRESET MULTIPLE REGISTERS
55H
15
UUUUUUUU UUUUUU
input 2
input 1
DIN1
DIN2
0
U: undefined
LSB
(Least Significant Byte)
MSB
(Most Significant Byte)
1