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Communication with Elsaco PLC devices (Czechia)

The Elsaco company delivers PLC's and PROMOS (PROMOS line 2) units. It is possible to communicate with these devices via the computer's serial port RS485 by several protocols:
 

Communication by Modbus protocol

Modbus is a standard, very often used protocol for Ethernet-client and for serial link.

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:

SAM ASCII protocol

Very simple protocol (like the building set ADAM) that allows to address more units on the common bus. It is used usually at simple devices that don't require the fast transfer of greater volume of data.

For this communication in the PROMOTIC system can be used: PmChar - Driver for communication by user defined ASCII/BIN protocol.

PROFIBUS DP protocol

The standard industrial protocol. It can be used the OPC server from various suppliers for this protocol. 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.

OPC server by the ELSACO company

The ELSACO company, the PLC manufacturer, also provides the OPC server for communication with these PLCs. 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 9.0.7 SCADA system documentation - MICROSYS, spol. s r.o.

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