One disadvantage of modular I/O is its lack of flexibility.
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Q10: When dealing with PLC memory,one K of
Q11: Modifying relay-type process control circuits usually involves
Q12: A personal computer communicates with the PLC
Q14: A PLC is basically a computer designed
Q15: The scan time is the time required
Q16: Plug-in compartments allow I/O modules to be
Q17: PLC systems usually require as much space
Q18: The instruction set for a particular PLC
Q19: PLCs were originally designed as replacements for:
A)microcomputers.
B)relay
Q20: The programming device must be connected to
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