DVP15MC11T Operation Manual
6.3 RS-485 Communication Port
6.3.1 Function that RS-485 Port Supports
The RS-485 communication port of DVP15MC11T can function as Modbus master or slave. HMI, PLC or
other Modbus master device can read and write data in the devices inside DVP15MC11T. The interval time
when the Modbus master accesses DVP15MC11T 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 0x01, 0x02, 0x03, 0x05, 0x06, 0x0F and
0x10. 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
DVP15MC11T’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.
Signal Definition
COM/SSI
11 D+ Positive pole
12 D- Negtive pole
5 SG Signal ground
6.3.3 RS-485 Hardware Connection
Example on Connection of DVP15MC11T into Modbus Network
DVP15MC11T is connected to Modbus network via RS-485.
1 2 3 4 5 6
Device
name
Modbus
master
ication
VFD-CM08 DVP15MC11T
motor
Servo drive
2
3
1
5
2
22
6
2
5
4
D V P 1 5 M C 11 T
4
DV P 1 5 M C 1 1T
6-8
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