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

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

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Automation System
The program execution time:

None of these
All of these
must be slower than the fastest mechanical operation that is to be controlled
cannot be changed once the program is written
will vary depending on the language used

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