Deck 11: The Basic Relay Instructions

Question 1

The basic symbols found on a ladder diagram are contacts and ____________________.

Answer 1

coils

Question 2

An internal bit as an output is used when the logical resultant of a rung controls other internal logic.

Answer 2

True

Question 3

Rungs are executed from left to right, or from inputs to outputs, starting at rung 0 and moving to the highest rung number.

Answer 3

True

Question 4

The "rising" portion of the one-shot rising instruction name means that the instruction is looking for the true-to-false transition of the input logic in front of the one-shot instruction.

Question 5

A programmable automation controller's repertoire of instructions is called its ____________________.

Question 6

List three rules that pertain to most latch and unlatch instructions.

Question 7

List three reasons for upgrading to a more powerful PLC.

Question 8

Briefly describe the XIO instruction.

Question 9

In all cases, the last instruction on any rung must contain some type of output instruction.

Question 10

List three examples of events triggered by a push-button input where the one-shot instruction can be applied.

Question 11

List three different sources that could provide the input bit referenced by the XIO instruction.

Question 12

All paths of instructions from the left power rail to an OTE instruction must be true for that instruction to evaluate as true.

Question 13

Rockwell Automation PLCs, such as the PLC-5, SLC 500, and ControlLogix family members, use the term examine if closed (XIC) to represent the ____________________ instruction.

Question 14

Rockwell Automation refers to the output instruction as the ____________________ instruction.

Question 15

The last rung in any routine contains the ____________________ instruction, which alerts the controller that there are no additional rungs to execute.