Communication with Modicon PLC devices
For communication of the PROMOTIC application with the
Schneider-Electric Modicon devices (
http://www.schneider-electric.com) for example, the following methods can be used:
Communication by Modbus protocol
The
Modicon devices support the
communication by the Modbus protocol. For this communication in the PROMOTIC system can be used:
PmModbusMr - Driver for communication by the Modbus Master protocol.
For easy integration of this driver into the application it is handy to use:
For this driver, it is recommended to set the configurators:
-
PmCommData > Parameters > Special Parameters > Area base addresses:
- base address "Bo = Coil/output bits" = 0 (for old PLC types = 1)
- base address "Bi = Input bits" = 0 (for old PLC types = 10001)
- base address "Ro = Holding/output registers" = 0 (for old PLC types = 40001)
- base address "Ri = Input registers" = 0 (for old PLC types = 30001)
Communication by OPC server
An
OPC server (for example from the
Schneider-Electric company) and the
PmOPCClient PROMOTIC component can also be used for these PLC's. Then the PROMOTIC application will communicate as a client by the
OPC interface, i.e. by the
PmOpcClient object, the PROMOTIC will be connected to the OPC server and thus communicate with the devices.