IAI America ROBO Cylinder Series - Manual (Page 77)

5. Modbus RTU
69
Modbus
(4) Query sample
A sample query that reads the total moving count (addresses 8400
H
to 8401
H
) of a controller with
axis No. 0 is shown below.
z Query (silent intervals are inserted before and after the query)
01 03 84 00 00 02 EC FB
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Start address [H] 8400
Number of registers [H] 0002
Error check [H] ECFB (in accordance with
CRC calculation)
End Silent interval
The response to the query is as follows.
z Response (silent intervals are inserted before and after the response)
01 03 04 00 00 02 1F BA 9B
Field RTU mode
8-bit data
Start Silent interval
Slave address [H] 01
Function code [H] 03
Number of data bytes [H] 04 (4 bytes = 2 registers)
Data 1 [H] 00 00
Data 2 [H] 02 1F
Error check [H] BA9B (in accordance with CRC calculation)
End Silent interval
The Total moving count is “21F
H
” o Convert into decimal number o 543[times]
Note The data of the response example is simply an example and will vary depending on
various conditions.