Automation System
There are several procedures you can implement to provide maximum security. The most important of these is:

do not allow unbonded service people to work on your equipment
Verify the reputation of the people installing your system
do not leave training manuals unsecured
run regular simulated tests using TARP (testing of Applications Recovery Planes)
None of these

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Automation System
What is the difference between integral and derivative control?

integral control has slower response to an error signal.
derivative control does not eliminate offset error
All of these
derivative control responds to a change in the rate of change in the error signal
None of these

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