(TCO 7) Technician A says a PLC enclosure should contain a power disconnect switch for physical isolation from the main power. Technician B says a programmed master control reset can also be used to achieve the same results. Who is correct?
(TCO 7) A solenoid fails to respond when forced on. Technician A says the ladder logic program could be causing the problem. Technician B says input hardware could be malfunctioning. Who is correct?
(TCO 7) Under no circumstances should