Failsafe Wiring Practices
Failsafe wiring practice is one of those topics that separates control system designers and electricians from other technical specialties. This is one of the areas that show up as problems...
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PLC Digital Signals Wiring Techniques
Ina process plant, on/off control is done through the PLC or DCS. The below Figure is an overview of one discrete/digital (on/off) circuit, showing the entire process from the power supply...
PLC Analog Signals Wiring Techniques
Unlike the discrete/digital (on/off) circuit, analog signals vary across a range of voltage or current. Taking the same vessel described previously in Digital wiring example, how would the wiring change...
PLC Program for Latching and unlatching Circuit
PLC Latching and unlatching Circuit This is PLC Program for Latching and unlatched circuit for output. Problem Description In some conveying system operator fills tank manually by operation water pump manually....