RST Study - PLCs Flashcards
1
Q
Define PLC Sequencer
A
An instruction that places outputs in an order that helps to
minimize the number of words used.
2
Q
How would you address a PLC input located on terminal 3 of module 4?
A
I:4/3
3
Q
What does XIC stand for?
A
Examine If Closed
4
Q
What does XIO stand for?
A
Examine If Open
5
Q
What are the three types of PLC counters?
A
Up, Down, Up/Down
6
Q
What sort of error causes a small change in input to fail to register any sort of change in output?
A
Deadband
7
Q
In Cascading Timers - One PLC timer is at 32k seconds - It can be increased by connecting its ___ to the ___ of another timer.
A
Output , Input
8
Q
Electrical and Mechanical Timers are hardware (physical) whereas PLC timers are ___.
A
Software (Virtual)
