Communication with Modicon PLC devices

For communication of the PROMOTIC application with the Schneider-Electric Modicon devices (, 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:
- PmaCommGroup > 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)
- PmaCommGroup > Parameters > Special Parameters > Max.number of variables received in one message:
- max. number "Bo = Coil/output bits" = 64
- max. number "Bi = Input bits" = 64
- max. number "Ro = Holding/output registers" = 32
- max. number "Ri = Input registers" = 4

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 PmaOpcClient object, the PROMOTIC will be connected to the OPC server and thus communicate with the devices.
PROMOTIC 9.0.8 SCADA system documentation - MICROSYS, spol. s r.o.

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