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Flashcards in Chapter 3 Deck (10)
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1

Processor is referred to ______ of PLC

Brain

2

Volatile Memory

Loses its stored information when power is removed.

3

Non-Volatile Memory

Ability to retain stored information when power is removed

4

1K of memory =

1024 words

5

When a PLC is turned ON it runs a self-diagnostic or self check test

True

6

Four steps of a typical PLC processor scan

1. Determine status of input devices
2. Interpret logic of program (Read and Ladder Logic)
3. Update (Turn ON or OFF output devices)
4. Communication and Housekeeping

7

Actual scan time increase with _______ of words

Increase

8

User Memory

Stores program

9

Storage Memory

Stores Data

10

Memory size ranges from _____ to _____

256 words
32 meg (million)