1MDU07205-YN rev. F
REF601 CEI
User’s manual
80
7.4.3 Function Code: 05 (Change Digital output)
This function code is used to enable digital output in a relay device. The possible
digital outputs are listed in table 11. A value of 0xFF00 or 0x0000 requests the output
to be enabled or disabled. However, in the commands implemented for REF601,
writing a value 0x0000 will have no effect, since there are no such operations that
need to be disabled.
The normal response is an echo of the request, returned after the coil state has been
written. A value other then 0xFF00 or 0x0000 will generate an exception for illegal
data value and any address other then those mentioned in Table 11 will generate an
exception of illegal data address.
Slave
Address
Function
Code
Output
Address
High
Output
Address
Low
Output
value
High
Output
value
Low
CRC CRC
01 05 00 01 FFh 00 CRC CRC
Request
Example: Change the breaker close output
Response message format for function code 0x05
Slave
Address
Function
Code
Output
Address
High
Output
Address
Low
Output
value
High
Output
value
Low
CRC CRC
01 0E 00 01 FFh 00 CRC CRC
Serial Communication
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