Device Control
Question Description
1) Construct an equivalent sequence data table for the six steps of the drum‐operated sequencer
drawn in Figure 1
2) Answer the following with reference to the sequence file #B3:0 shown in Figure 2.
3) What is the function of the file of a sequencer? What is the function of the mask in the sequencer?
4) When line voltage variations to the PLC power supply are excessive, what can be done to solve the
problem?
5) List three potential noise‐generating inductive devices
6) State the basic function of each of the following as part of a process control system:
7) State the purpose of each of the following types of screens associated with HMIs:
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