Communication with PLC devices by the Unitronics company
, Israel) supplies (free of charge) the OPC server
for communication with their devices. This software is a 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
The usage of the PmaOpcDaClient
object requires purchase of the "PmOPC" licence
. With the freeware version PmFree
, or when developing the application (with development environment
for testing purposes), this component is always functional.
device supports also the communication by the Modbus protocol
For this communication in the PROMOTIC system can be used: