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

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

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Automation System
Sensors:

will be much smarter and more sophisticated in the future
are not important in automation
None of these
are easily developed
probably will not improve over the next decade

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