Automation System
One advantage of a PC in industrial control is that it:

is unreliable because there are no moving parts
has a reliable long life compared to relay logic
All of these
None of these
is very difficult for the inexperienced programmer to understand

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Automation System
The program counter:

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

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Automation System
A continuous process is:

used only for simple tasks
one that never shuts down
used only with analog controllers.
None of these
self-contained in that raw materials enter the process and an identifiable products exits the process.

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