Parker P Series, User Manual, Page: 67 / 316

Parker Hannifin
P Series User Guide 65
4.1 Overview
PD Drive complies with the MODBUS-RTU protocol for communication. For issues not
specified in this manual, please see the related standards (Related Standard: Modbus
Application Protocol Specification 1.1b, 2006.12.28)
In addition, the transmission (Tx) and reception (Rx) concepts are defined in reference to
the host.
4.2 RS-422 Communication
PD drive is capable of connecting to the host controller (Handy Loader, HMI, PLC, PC,
etc.) through RS-422 serial communication, allowing the user to use such functions as
commissioning, gain tuning, parameters change/configuration and indexer operation.
In addition, up to 31 multiple PD drives can be connected using multi-drop method, to allow
for operation and control through communication.
IN
OUT
USB Port
USB to RS-422
Communication
converter
Servo
Drive PC
IN
OUT
Servo
Drive
IN
OUT
Servo
Drive
Figure 27. RS-422 Multi-Drop Connection Example
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