Automation System
Programmable controllers:

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

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Automation System
The program execution time:

must be slower than the fastest mechanical operation that is to be controlled
None of these
All of these
cannot be changed once the program is written
will vary depending on the language used

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Automation System
A process controller:

is useful in a continuous process control application
can interface to digital and analog I/O
None of these
can solve a PID process control equation easily
All of these

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