User manual

5 Universal (General-purpose communication)

Universal indicates general purpose of communication, Modbus Slave communication is

supported in GP/LP.

5.1 System organization

Microcomputer using as host unit is able to execute slave communicate with GP/LP through RS-

232C or RS-422(RS-485) communication port. Host unit read and write inner register(UB, UW)

of GP/LP as communication commander. Host unit as master transmits command to GP/LP and

GP/LP as slave executes designated operation according to transmitted command and sends

respond message.

The following is the system organization for connecting with GP/LP and host unit.

※For connect cable information, refer to ‘1.3 Communication’.

The following table is for basic communication configuration of host unit.

Item

Description

Note

Communication

mode

RTU Not used

2 Baudrate 38400 bps Fixed

3 Data type

Data length 8 bit Fixed

Parity None Fixed

Stop bit 1 bit Fixed

4 Station 1 to 31 Designate this in GP/LP