Automation System
A sequence controller:

is a mechanical only controller
None of these
is difficult to program
is no longer in widespread use
performs on/off control functions in relation to time.

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Automation System
What is offset error?

All of these
the difference between the sensor input and the absolute sensed parameter.
None of these
the difference between the controller output and the setting of the manipulated variable.
the difference between the control setpoint value and the actual value.

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Automation System
Microcomputer-based control sys-tems

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

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