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

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

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Automation System
Ergonomics refers to:

the human aspect of the environment around the workstation as well as the workstation itself
None of these
the technology involved in the workstation itself
the cost relationship of the workstation versus productivity
the level of involvement the operator has with the workstation

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