DVP-15MC Series Motion Controller Operation Manual 6.3 RS-485 Communication Port 6.3.1 Function that RS-485 Port Supports The RS-485 communication port of the motion controller can function as Modbus master or slave. HMI, PLC or other Modbus master device can read and write data in the devices inside the motion controller. The interval time when the Modbus master accesses the motion controller should exceed 5ms. The progrom can not be downloaded via RS-485 port. RS-485 supports Modbus protocol, ASCII as well as RTU mode. The function codes which RS-485 port supports include 16#01, 16#02, 16#03, 16#05, 16#06, 16#0F and 16#10. The station addresses that RS-485 port supports are 1~255.
The broadcast function is not supported. Refer to appendix A for details on Modbus communication and Modbus device addresses. 6.3.2 Definitions of RS-485 Port Pins The motion controller’s COM/SSI port consists of 15 pins. The external port is commonly used for RS-485 communication and SSI absolute encoder. See the table below for definitions of respective RS-485 communication port pins. 6.3.3 RS-485 Hardware Connection _6 Example on Connection of DVP-15MC Series Motion Controller into Modbus Network The controller is connected to Modbus network via RS-485.
1 D V P 1 5 M C 1 T DV P 1 5 M C 1 1T 4 4 2 2 3 5 5 6 2 2 2 6-10 Pin Definition Positive pole Negtive pole Signal ground COM/SSI Signal No. 11 D+ 12 D- 5 SG Device 1 2 3 4 5 6 No. Device name Modbus master Commu ication cable n VFD-CM08 The motion controller AC motor drive Servo drive