Automation System
One advantage of a PC in industrial control is that it:

has a reliable long life compared to relay logic
is very difficult for the inexperienced programmer to understand
None of these
is unreliable because there are no moving parts
All of these

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Automation System
Microcomputer-based control sys-tems

will tend to increase in cost.
will have more standard industrial application software available in the future.
will just keep their present capability
None of these
All of these

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Automation System
Programmable controllers:

None of these
are programmed using relay ladder logic
(a) and (c) above
are widely used in many different industries
cannot perform functions other than relay logic

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