Automation System
The program counter:

is where arithmetic is done in a computer.
counts the number of instructions that have been executed
None of these
decides which program to run
contains the address of the next instruction to be executed

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Automation System
D/A (digital to analog) conversion:

None of these
results in a binary code as the final output
must be fed through a filter to reproduce the original signal accurately
has to be sampled at 1/2 the highest input frequency
both (b) and (c)

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Automation System
What is offset error?

the difference between the controller output and the setting of the manipulated variable.
None of these
All of these
the difference between the control setpoint value and the actual value.
the difference between the sensor input and the absolute sensed parameter.

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