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

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

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Automation System
A process controller:

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

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