Abstract:Absrrucr: The PLCs are now more flexible and powerhl due to their network operation. The paper deals the communication in a hybrid decentralized PLC system. The system operates as a bi-directional communication system based on a serial port RS-232 each element receiving and sending ASCII telegrams. A program was designed and implemented for testing the Communication in the system. For each PLC the test program was written in his own pro,g"ming language. The system includes also a MMI element, the Operator Stat… Show more
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