Parker HannifinP Series User Guide 654.1 OverviewPD Drive complies with the MODBUS-RTU protocol for communication. For issues notspecified in this manual, please see the related standards (Related Standard: ModbusApplication Protocol Specification 1.1b, 2006.12.28)In addition, the transmission (Tx) and reception (Rx) concepts are defined in reference tothe host.4.2 RS-422 CommunicationPD 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 ascommissioning, gain tuning, parameters change/configuration and indexer operation.In addition, up to 31 multiple PD drives can be connected using multi-drop method, to allowfor operation and control through communication.INOUTUSB PortUSB to RS-422CommunicationconverterServoDrivePCINOUTServoDriveINOUTServoDriveFigure 27. RS-422 Multi-Drop Connection Examplewww.comoso.com
