User manual

3 PLC Communication
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3.4 Heterogeneous communication
3.4.1 System organization
It is able to communicate between GP or LP and PLC or controller by connecting heterogeneous
PLC to each port RS232C and RS422 o f G P / L P.
GP/LP transits communicates between CH1 and CH2 by the designated inner link device.
Heterogeneous communication is available by the following system organization such as
CH1(1)↔GP(1)↔CH2(1) or CH1(1)↔GP(1)↔CH2(N).
CH1 should be one device. If CH2 has one deivce, RS232C or RS422 communication is
available as above figure. If CH2 has N devices, RS422 or RS485 communicatin is available.
If CH2 has N devices, PLCs are connected with GP through RS422(or RS485) port. Each
connected PLC should have its station (individual ID) to avoid communication conflicts.
PLCs have to be same type.
The number ‘N’ of PLCs should be available to communicate with RS422 or RS485 port and
they should be same type.