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If you have PC and PLC how do they communicate by means of hardware and software if e.x: I have Siemens PLC s7 300, 400 and Allen Bradley RX LOGIX 5000?

Hardware Automation Computer Science Instrumentation Software
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Question added by Shajath Ali , Senior Engineer , Megha Engineering and Infrastructure limited
Date Posted: 2016/04/10
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ashwin raja
by ashwin raja , automation trainer , karunya university

in case of siemens plc s7300 and s7400 commnication is done by ethernet or mpi

Hasan Zainy
by Hasan Zainy , Control / Instrumentation Filed Service Engineer , GE

in general

you can connect between two control system by hard wire such as relay in on plc and concoct input in other

also you can use modbus or opc to interchange the data by software

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