Comms, Networks, & PLCs Flashcards
What is the first thing that should be done prior to working on any part of a communication system?
Communicate with operations.
Why is it important to communicate with operations before working on a communication system?
Determine exact nature of the problem.
Determine process effects of loss of comms.
Discover the criticality of the end device.
What are the most common failures of a communication system?
Bad power Supply.
Bad Card.
Before replacing parts on a PLC what is the important thing to do?
Determine what control devices, alrms, and shutdowns are associated with the card or PLC.
After eliminating the end device and field wiring as loop problems, ehat is the next step?
Relapce the card.
If replacing the card does not repeir a loop problem, what is the next step?
Replace the backplane.
What indication is there that there is a problem with the Ethernet Highway?
Screens will go purple.
