Instruction Manual

6. Modbus ASCII

253

Modbus

(4) Sample query

A sample query that moves the actuator of a controller of axis No. 0 to the position specified by the

position number stored in the position number specification register (POSR:0D03

) is shown below.

Query:

First time: 01 05 04 0C FF 00 EB --- Movement command

Second time: 01 05 04 0C 00 00 EA --- Normal status

Field ASCII mode 8-bit data Converted ASCII

code data [H]

Start ‘:’ 3A

Slave address [H] ‘0’, ‘1’ 3031

Function code [H] ‘0’, ‘5’ 3035

Start address [H] ‘0’, ‘4’, ‘0’, ‘C’ 30343043

Changed data [H] First time: ‘F’, ‘F’, ‘0’, ‘0’

Second time: ‘0’, ‘0’, ‘0’, ‘0’

(Restore the normal status.)

46463030

30303030

Error check [H] First time: ‘E’, ‘B’ (In accordance with LRC

calculation)

Second time: ‘E’, ‘A’ (In accordance with

LRC calculation)

4542

4541

End ‘CR’, ‘LF’ 0D0A

If the change is successful, the response message will be the same as the query.