1MDU07205-YN rev. F
REF601 CEI
User’s manual
81
This function code is used to change single setting of relay device. The request
packet specifi es the address of the register to be written. The normal response is an
echo of the request, returned after the register contents have been written.
For editing the settings of the relay, refer table 3 and 4 for IEC version and CEI 0-16
version respectively. The same function code is also used for editing the confi guration
of the relay.
The confi guration parameters that can be edited through the MODBUS include the
Nominal Value Type selection between 40,80,250,1250 and Earth Type (Internal-
External) for the IEC version of relay,
For the CEI 0-16 version, the Earth type is non-editable and is fi xed. The Nominal
Value Type selection allowed is only 80 & 250. The Nominal Value Type cannot be
changed to 40 & 1250.
For editing confi guration parameters of the relay, refer Table 12 for address and data
values.
7.4.4 Function Code: 06 (Write single register-Change relay setting)
Slave
Address
Function
Code
Starting
Address
High
Starting
Address
Low
Setting
value
high
Setting
value
low
CRC CRC
01 06 00 05 00 0 Ah CRC CRC
Request
Example: Write 0Ah value to resistor value with address 0x0005 on slave at add. 01
Response message format for function code 06
Slave
Address
Function
Code
Starting
Address
High
Starting
Address
Low
Setting
value
high
Setting
value
low
CRC CRC
01 06 00 05 00 0 Ah CRC CRC
Serial Communication
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