Modbus – IAI America ROBO Cylinder Series User Manual
Page 241
6. Modbus
ASCII
233
Modbus
6.4.21 Position Complete Number Query <<POSS>>
(1) Function
This query reads the position complete number.
[Refer to “4.3.2 (18) Data of position number status register.”]
(2) Query format
Field
Number of characters ASCII mode character
string (fixed)
Remarks
Header
1
‘:’
Slave address [H]
2
Arbitrary
Axis number + 1
(01
H
to 10
H
)
Function code [H]
2
‘0’, ‘3’
Reading registers
Start address [H]
4
‘9’, ‘0’, ‘1’, ‘4’
Position number status
Number of registers [H]
4
‘0’, ‘0’, ‘0’, ‘1’
Reading address 9014
H
Error check [H]
2
LRC calculation result
Trailer
2
‘CR’, ‘LF’
Total number of bytes
17
(3) Response format
A response message contains 16 bits of data per register.
Field
Number of characters
ASCII mode
character string
(fixed)
Remarks
Header
1
‘:’
Slave address [H]
2
Arbitrary
Axis number + 1
(01
H
to 10
H
)
Function code [H]
2
‘0’, ‘3’
Reading registers
Number of data bytes [H]
2
‘0’, ‘2’
Reading 1 register
= 2 bytes
Data [H]
4
Position number
status
Refer to 4.3.2 (18), “List
table.”
Error check [H]
2
LRC calculation result
Trailer
2
‘CR’, ‘LF’
Total number of bytes
15