Basic Block Diagram of PLC

Figure shows basic block diagram of PLC (Programmable Logic Controller). The CPU of PLC is programmed using a programming terminal usually through personal computers or dedicated HMIs. Basic Modules associated with the CPU are external modules and i/o modules along with bit, byte, word and double word addressable memory locations. 

A PLC is an example of a hard real time system since output results must be produced in response to input conditions within a bounded time. 

Posted by Muhammad Ahmed on 11:50. Filed under , . You can follow any responses to this entry through the RSS 2.0. Feel free to leave a response


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