Automation System
Programmable controllers:

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

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Automation System
What is offset error?

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

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