Parker Hannifin
P Series User Guide 65
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.
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
conve rter
Servo
Drive
PC
IN
OUT
Servo
Drive
IN
OUT
Servo
Drive
Figure 27. RS-422 Multi-Drop Connection Example
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