Delta D25886 User Manual Page 264

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Appendix A
DVP-MC operating manual A-1
Appendix A Modbus Communication
DVP10MC11T Modbus Communication Port:
DVP10MC11T covers two communication ports such as COM1 and COM2.
COM1: COM1 is a RS-232 communication port possessed by PLC module supporting Modbus ASCII or
RTU mode. It can serve as Modbus master or slave to upload and download the program, monitor
PLC device, connect the human machine interface and etc.
COM2: COM2 is a RS-485 communication port supporting Modbus ASCII or RTU mode and is the
hardware port shared by motion control module and PLC. Via the port, the motion control module
and PLC can be accessed respectively according to their different node addresses. So the node
address of motion control module and PLC must be different when COM2 is used. When COM2 is
possessed by PLC module, it could serve as Modbus master or slave. When COM2 is possessed
by motion control module, it could only serve as Modbus slave.
The Pin definition of DVP10MC11T Modbus communication port:
The Pin definition of DVP10MC11T RS-232COM1:
Pin Signal Description
12
+5V 5V Power positive pole
3 GND Grounding
4 Rx For receiving the data
5 Tx For sending the data
6 GND Grounding
7 NC Reserved
The Pin definition of DVP10MC11T RS-485COM2:
Pin Signal Description
1 + Signal+
2 _ Signal-
3 SG --
DVP10MC11T Modbus Communication Port Setting
1. COM1 communication format is set by D1036 and the meaning for each bit of D1036 can be seen in table
1. its communication node adress is determined by D1121. If the value of D1121 is 1, it indicates that the
communication node address of PLC module is 1. The default communication format for COM1: Baud
rate=9600bps, Data bits=7, Parity=E, Stop bits=1, Mode=ASCII, Address=1
Note:
9 After COM1 communication format is modified, if RUN/STOP switch of DVP10MC11T turns
RUNSTOP, the communication format keeps unchanged.
9 After COM1 communication format is modified, DVP10MC11T power is switched on from off, COM1
will be restored to the communication format of factory setting
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