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

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

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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
None of these
derivative control responds to a change in the rate of change in the error signal
All of these

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