Denkovi smartDEN IP-16R Series User Manual

smartDEN IP-16R-XX User Manual
13 Apr 2021
-48-
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:

Denkovi smartDEN IP-16R Series Specifications

General

Brand	Denkovi
Model	smartDEN IP-16R Series
Category	Control Unit
Language	English