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Communication with Unitronics PLC devices

Basic information:

The Unitronics company supplies (free of charge) the OPC server for the communication with their devices. This software is part of the installation CD-ROM that is supplied with each unit by default.

 
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.

Using the PROMOTIC OPC client component is bound to purchase of the PmOpcClient license. With the freeware version PmFree, or when developing the application (with development environment for tersting purposes), this component is always functional.

 
The Unitronics device promotes also the communication by the Modbus protocol.

For this communication in the PROMOTIC system can be used: PmModbusMr - Driver for communication by Modbus Master protocol.

For easy integration of this driver into the application it is handy to use:
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