Packet Structure; Table 20. Rs-422 Connector Pin Description; Table 21. Rs-422 Transmission Packet Structure - Parker P Series User Manual

1
8
OUT
Pin arrangement viewed from the front
side of the drive
Pin No.
1
2
3
4

Table 20. RS-422 Connector Pin Description

NOTE ) As for IN connector, 5V voltage is output to Pin No. 7 and Pin No. 8, to supply
power to the handy loader. Use for any other purpose is not allowed, and do not
connect Pin No. 7 and Pin No. 8 when wiring.
NOTE ) Connect TXD+ and TXD-, RXD+ and RXD- using twisted pair.
NOTE ) TXD and RXD of the above table is defined based on the servo drive.

4.2.3 Packet Structure

Maximum length of transmission/reception packet of MODBUS-RTU is 256 Byte.
Please make sure the total length of transmission/reception packet does not exceed
256 byte.
To classify packets, MODBUS-RTU Communication Mode requires empty spaces of at
least 3.5 characters at the starting point and the end point.
to
at least 3.5 char
 Transmission Packet Structure
Additional
Address
Byte
description Node ID

Table 21. RS-422 Transmission Packet Structure

Parker Hannifin
1
IN
Pin Function
Not Used
Not Used
RXD+
TXD-
Packet1
at least 3.5 char
Functio
n Code
0 1
Function Data
8
Pin arrangement viewed from the
Pin No.
5
6
7
8
Packet2
4.5 char
Data
2 . .
. .
connector
Pin Function
TXD+
RXD-
Not Used
Not Used
Packet3
Error Check
n-1 n
CRC(MSB) CRC(LSB)
P series User Guide 64