In the previous four segments of How to Program a PLC V1, we covered an simple application from concept, through electrical design and then conversion to a PLC Program in LLD. In this segment, the fifth, we revert to a virtual application and add logic for a single button operator interface station replacing the three push button design in the earlier segments.
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really its very interesting topic…thanks to plc professor
Surely the OSR has to have a contact which will carry the power to all the branches when the Push Button is unlatched. If not then nothing will happen.