Denkovi smartDEN IP-16R-MT, User Manual

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smartDEN IP-16R-MT User Manual
7 July 2020
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Response example: Read Week Schedule Start Date fields:
Table 20. Read Holding Registers response
Field Length Data
Transaction Identifier 2 Bytes 0x0004
Protocol Identifier 2 Bytes 0x0000
Length 2 Bytes 0x0009
Unit Identifier 1 Byte 0x00
Function Code 1 Byte 0x03
Byte Count 1 Byte 0x06
Start Date (Day) 2 Bytes 0x000A
Start Date (Month) 2 Bytes 0x0009
Start Date (Year) 2 Bytes 0x07E4
Error
The possible error responses for function code 0x03 are:

Function Code (1 byte): 0x83 (0x80 + 0x03)

Exception Codes (1 byte):
- 0x01
– Function code not supported
- 0x02
– Incorrect combination of start address and number of registers
Error response example:
Table 21. Read Holding Registers error response
Field Length Data
Transaction Identifier 2 Bytes 0x0004
Protocol Identifier 2 Bytes 0x0000
Length 2 Bytes 0x0003
Unit Identifier 1 Byte 0x00
Function Code 1 Byte 0x83
Exception Codes 1 Byte 0x01 or 0x02
9.1.5. Write Single Register
This command is used to write a single register.
Request
The Write Single Register request specifies the register address to be written, and
the register value.
Request example: Generate pulse on Relay 10, pulse width 3 seconds:
Table 21. Write Single Register request
Field Length Data
Transaction Identifier 2 Bytes 0x0005
Protocol Identifier 2 Bytes 0x0000
Length 2 Bytes 0x0006
Unit Identifier 1 Byte 0x00