Deck 9: Programming Considerations

Question 1

It is common practice to wire the overload contacts to an input module.

Answer 1

False

Question 2

A branch circuit within a branch circuit is known as ____________________.

Answer 2

nesting

Question 3

A network constitutes one rung of a ladder diagram that starts at the right rail and ends at the left rail.

Answer 3

False

Question 4

How do you know that the starter has energized?

Question 5

A(n) ____________________ is defined as a group of connected logic elements used to perform a specific function.

Question 6

When a hard-wired backup control circuit is used in conjunction with a PLC to control a motor, then the overload contact on the motor starter must be wired in series with the motor coil to provide protection for the motor under both means of control, PLC and hard-wired.

Question 7

The way the processor scans the program is the same from PLC to PLC.

Question 8

A typical PLC network limitation is ____________________ series contacts per line.

Question 9

Describe the scanning method used by Allen-Bradley for their family of PLCs.

Question 10

How should all STOP buttons be wired?

Question 11

The easiest way to avoid nesting is to remember that all branches must start at a common point, and all of the branches must end at the same location.

Question 12

What can be done when a program requires more parallel branches than the network allows?

Question 13

As a general rule, all input devices, except STOP buttons, are wired ____________________.

Question 14

With a parallel output configuration, all of the outputs are ON or OFF at the same time, based on the ____________________.

Question 15

How does the processor consider power flow, or logic continuity, when it scans a rung of logic?