IAI America ROBO Cylinder Series - Manual (Page 117)

5. Modbus RTU
109
Modbus
5.3.21 Position Complete Number Reading<<POSS>>
(1) Function
This bit reads the position complete number.
[Refer to 4.3.2 (18), “Data of position number status register.”]
(2) Query format
Field Number of data items
(number of bytes)
RTU mode
8-bit data
Remarks
Start None Silent interval
Slave address [H] 1 Arbitrary Axis number + 1 (01
H
to 10
H
)
Function code [H] 1 03 Register reading
Start address [H] 2 9014 Position number status
Number of registers [H] 2 0001 Reading address 9014
H
Error check [H] 2 CRC (16 bits)
End None Silent interval
Total number of bytes 8
(3) Response format
A response message contains 16 bits of data per register.
Field Number of data items
(number of bytes)
RTU mode
8-bit data
Remarks
Start None Silent interval
Slave address [H] 1 Arbitrary Axis number + 1 (01
H
to 10
H
)
Function code [H] 1 03 Register reading
Number of data bytes [H] 1 02 Reading 1 register = 2 bytes
Data [H] 2
Position number
status
Refer to 4.3.2 (18), “List table.”
Error check [H] 2 CRC (16 bits)
End None Silent interval
Total number of bytes 7