Which of the following sequence instructions would be used for a process tank control problem with four process states controlled by two process triggers?
A) Timer controlled SQO sequencer. B) Event controlled SQO sequencer.
C) Event controlled SQL sequencer. D) Timer controlled SQL sequencer.
Question 2
If the input module indicator and the XIC and the XIO ladder instructions are in agreement, then a voltage measurement indicates ________.
A) The problem is in the field wiring or field device if the input voltage does not agree with the field device condition
B) The problem is in the input in the module if the input voltage agrees with the field device condition
C) Either A or B
D) Neither A or B
Bottom-up control versus top-down control.
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