Algodue ELETTRONICA UPM307 - Main Configuration Settings: PT, CT, Wiring; Voltage and Current Transformer Ratios; CT Ratio Warning for Rogowski Inputs; Current Input Range and Wiring Mode

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ENGLISH
Parameters setup
MODBUS protocol manual
5. PARAMETERS SETUP
(Function code $10)
The master communication device can send commands to the instrument to program it.
More settings can be carried out, at the same time, sending a single command, only if the relevant
registers are consecutive.
According to the used MODBUS protocol type, the write command is structured as follows.
MODBUS ASCII/RTU
Values contained both in Request or Response messages are in hexa format.
Query example in case of MODBUS ASCII/RTU: 0110E02800010200070074
Example Byte Description No. of bytes
01 - Slave address 1
10 - Function code 1
E0 High
Starting register 2
28 Low
00 High
No. of words to be written 2
01 Low
02 - No. of bytes to be written 1
00 High
Data for programming 2
07 Low
00 High
Error check (CRC) 2
74 Low
Response example in case of MODBUS ASCII/RTU: 0110E0280001B601
Example Byte Description No. of bytes
01 - Slave address 1
10 - Function code 1
E0 High
Starting register 2
28 Low
00 High
No. of written words 2
01 Low
B6 High
Error check (CRC) 2
01 Low