Denkovi smartDEN IP-16R Series, Руководство пользователя

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smartDEN IP-16R-XX User Manual
13 Apr 2021
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10.2.1.1. Write Single Coil
This command will turn single relay output to ON or OFF.
Request
The Write Single Coil request specifies the address of the coil to be forced:

Address: 0x0000 (Relay 1) to 0x000F (Relay 16)
A value of 0xFF00 requests the coil to be ON, a value of 0x0000 requests the coil
to be OFF, and a value of 0xFF02 toggles the coil state. All other values are illegal
and will not affect the coil state.
Note: If the address exceeds 16, an error response will be returned.
Request example: Write Single Coil 2 (Relay 2) to ON:
Table 10.13. Write Single Coil request
Field Length Data
Transaction Identifier
2 Bytes 0x0002
Protocol Identifier 2 Bytes 0x0000
Length 2 Bytes 0x0006
Unit Identifier 1 Byte 0x00
Function Code 1 Byte 0x05
Output Address 2 Bytes 0x0001
Output Value 2 Bytes 0xFF00
Response
The response indicates the new state of the relay.
Response: Write Single Coil 2 (Relay 2) to ON:
Table 10.14. Write Single Coil reply
Field Length Data
Transaction Identifier 2 Bytes 0x0002
Protocol Identifier 2 Bytes 0x0000
Length 2 Bytes 0x0006
Unit Identifier
1 Byte 0x00
Function Code 1 Byte 0x05
Output Address 2 Bytes 0x0001
Output Value
2 Bytes 0xFF00
Error
The possible error responses for function code 0x05 are:

Function Code (1 byte): 0x85 (0x80 + 0x05)

Exception Codes (1 byte):
- 0x01
– Function code not supported
- 0x02
– Incorrect relay address
- 0x03
– Illegal relay value
Error response example: