Automation System
In the operation of a programmable controller:

any latched data must be done using an external latching relay
None of these
mathematics cannot be performed
All of these
all of the logic status is maintained in memory

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Automation System
What is proportional control?

The gain is independent of offset error.
All of these
It has a discrete output for each error value
None of these
The controller output varies continuously over a range

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