User Manual of A90 Series Inverter
280
code Lo
Data Hi
A5
Data Hi
A5
Data Lo
37
Data Lo
37
12.3.3.5 0x06: function code used to write a single register or command
In the remote terminal unit, this function code is used to write a single holding register.
The request PDU describes the address to be written to the register.
The normal response is the response made to the request, which is returned after the
register content is written.
Request PDU
Function code
1 byte
0x06
Address of register
2 bytes
0x0000 - 0xFFFF
Register value
2 bytes
0x0000 - 0xFFFF
Response PDU
Function code
1 byte
0x06
Address of
register
2 bytes
0x0000 - 0xFFFF
Register value
2 bytes
0x0000 - 0xFFFF
Error PDU
Error code
1 byte
0x86
Exception code
1 byte
Below is an example of a request to change the drive control mode of the motor 1
(F00.01) to “1: SVC”.
Request
Respond
Domain name
(0x)
Domain
name
(normal)
(0x)
Domain name
(abnormal)
(0x)
Function
06
Function
06
Function
86
Register address Hi
00
Register address
Hi
00
Exception
code
03
Register address Lo
01
Register address
Lo
01
Register value Hi
00
Register value Hi
00
Register value Lo
01
Register value Lo
01
★
The function code 0x06 cannot be used if modified frequently, in order to avoid
damage to the inverter.