Automation System
In the operation of a programmable controller:

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

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Automation System
How is the integral mode implemented on a digital controller?

the digital controller cannot handle integral mode
None of these
the error is divided into discrete amounts
All of these
the error signal is summed over a discrete time interval and accumulated by the controller

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