Programmable controller introduction to the communication interface

One trait is the modern PLC controller communication function, the current mainstream of PLC with RS485 (generally Or RS232) Communication interface to connect programmable devices, monitors, printers and other peripherals, or connection simple control equipment such as frequency converter, temperature controller for simple master-slave communication, realize the 'one' or 'machine - The dialogue between machine '. Some advanced PLC also has industrial network communication interface, can be connected with other PLC controller or computer, distributed industrial control system, to achieve greater control, also can be combined with database software, realizes the control and management with the combination of comprehensive control.
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