Sinee A90 Series, Руководство пользователя

Страница: 276 / 300

User Manual of A90 Series Inverter
276
multiple function codes across groups. However, it is recommended not to read them
across groups in the case of no special requirements, so the customer’s software does
not need to be upgraded after our products are upgraded.
12.3.3.2 0x41: function code used to write a single register or command (without
saving)
In the remote terminal unit, this function code is used to write a single non-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
0x41
Address of register 2 bytes 0x0000 - 0xFFFF
Register value 2 bytes 0x0000 - 0xFFFF

Response PDU
Function code 1 byte 0x41
Address of register 2 bytes 0x0000 - 0xFFFF
Register value 2 bytes 0x0000 - 0xFFFF

Error PDU
Error code 1 byte 0xC1
Exception code 1 byte See Table 0-4
Below is an example of a request to change the main frequency source A (7001H) to
“-50.00%”:
Request Respond
Domain name (0x) Domain name
(normal)
(0x) Domain name
(abnormal)
(0x)
Function 41 Function 41 Function C1
Register address Hi 70 Register address Hi 70
Exception
code
03
Register address Lo 01 Register address Lo 01
Register value Hi EC Register value Hi EC
Register value Lo 78 Register value Lo 78
★
This function code cannot be used to change the parameters of the attribute “○”