Differentiate Between Characteristic and Defining Features

question 29

Essay

Differentiate between characteristic and defining features.

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Definitions:

Latch Instruction

One-half of an instruction pair (the second instruction of the pair being the unlatch instruction) that emulates the latching action of a latching relay. The latch instruction for a programmable logic controller energizes a specified output point or internal coil until it is de-energized by a corresponding unlatch instruction.

MCR Zone

In programmable logic controllers (PLCs), a Master Control Relay zone, which refers to a section of the program controlled by a master relay for safety or operational purposes.

Subroutine

A set of instructions designed to perform a frequently used operation within a program.