It is rare for sensors and actuators connected to the I/O of the process to fail.
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Q29: The PLC will only accept multiple programs.
Q30: The suppression device is normally wired in
Q31: The offline programming mode permits the user
Q32: A metal oxide varistor (MOV) can be
Q33: One of the diagnostic checks carried out
Q35: An addressing conflict is caused by the
Q36: The processor of a PLC monitors its
Q37: PLC output modules may incorporate fuse or
Q38: The suspend instruction is used to trap
Q39: The contact histogram function is used to
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