Chapter 6 Wiring, Communication Setting and Network Construction 6.4 RS-232 Communication Port 6.4.1 Function that RS-232 Port Supports The RS-232 communication port of the motion controller can function as Modbus master or slave. HMI, PLC or other Modbus device can read and write data in the devices inside the motion controller. The progrom can not be downloaded through RS-232 port. RS-232 supports Modbus protocol, ASCII mode as well as RTU mode. The function codes which RS-232 port supports include 16#01, 16#02, 16#03, 16#05, 16#06, 16#0F and 16#10. The station addresses that RS-232 port supports are 1~255. The broadcast function is not supported.
Refer to appendix A for details on Modbus communication and Modbus device addresses. 6.4.2 Definitions of RS-232 Port Pins The motion controller’s COM/SSI port consists of 15 pins. See the table below for definitions of respective RS-232 communication port pins. 6.4.3 RS-232 Hardware Connection DV P15M C11T COM RS -232 port wiring （ ） P C 6_ RS-232 port is connected to HMI when the motion controller functions as a slave. 6-13 Pin No.
Signal Definition COM/SSI 3 Tx Transmitting data 9 Rx Receiving data 5 GND Signal ground Functi on Pin Pin Function 1 2 R X D 3 TXD 4 D TR 5 GN D 6 D SR 7 R TS 8 C TS 9 Pin Function 1 1 2 2 R X D TXD 3 3 TXD 4 4 D TR GN D 5 5 GN D 6 6 D SR 7 7 R TS 8 8 C TS R X D 9 9 10 11 12 13 14 15