Hi,
I would like to communicate with a PLC using parallel I/Os, I have 5 inputs and 1 output, Is there any standard method or protocol for doing this ???
I have thought of a scheme, for example when the PLC sends a numeric code (say 12), the 5 Input ports are set as 01100 (here 1- High, 0- Low), the 5 th input is pulsed from low to high (this is the strobe input), the inputs are captured after application of the strobe input.
The output is toggled low to high, indicating the input has been received.
I was wondering if there were any standard methods of communication that are used in PLCs.
thanks
aa
I would like to communicate with a PLC using parallel I/Os, I have 5 inputs and 1 output, Is there any standard method or protocol for doing this ???
I have thought of a scheme, for example when the PLC sends a numeric code (say 12), the 5 Input ports are set as 01100 (here 1- High, 0- Low), the 5 th input is pulsed from low to high (this is the strobe input), the inputs are captured after application of the strobe input.
The output is toggled low to high, indicating the input has been received.
I was wondering if there were any standard methods of communication that are used in PLCs.
thanks
aa