AH500 Hardware and Operation Manual
11-2
11.1 PLC Link (for AHCPU5X0 models)
This function is applicable for AH500 basic CPU module series (AHCPU500/510/520/530).
11.1.1 Introduction of a PLC Link
A PLC Link is a network mechanism for data exchange performed through an RS-485 cable. If there are
several nodes in an RS-485 network, users can create a mechanism for data exchange in the network. If the
parameters which are set are downloaded to the PLC which functions as a master station, the system of the
PLC will perform data exchange through special auxiliary relays and special data registers when the PLC runs.
11.1.2 Constructing a PLC Link in NWCONFIG in ISPSoft
Constructing a PLC Link
A PLC Link is a network mechanism for data exchange performed through an RS-485 cable. If there are
several nodes in an RS-485 network, users can create a mechanism for data exchange in the network. If the
parameters which are set are downloaded to the PLC which functions as a master station, the system of the
PLC will perform data exchange through special auxiliary relays and special data registers when the PLC runs.
A PLC Link is a master/slave model. There is only one master station in an RS-485 network, and the other
stations which are slave stations passively receive reading/writing commands from the master station. The
slave stations can not exchange data. They have to exchange data through the master station.
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