Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 17)

An Introduction to
Programmable Controllers
Chapter 2
2Ć3
Power Supply
Processor
Information
Limit, Proximity, Pressure,
Action
(Decision Making)
•
Temperature Switches
Push Buttons
Logic
BCD
Analog
•
•
•
•
Solenoids •
Motor Starters
Indicators
Alarms
Logic
BCD
Analog
•
•
•
•
•
•
Input Output
Processor
The first section of a programmable controller is the processor. The processor
might be called the “brains” of the programmable controller. It is divided
into halves:
central processing unit
memory
CPU
Data
Table
Program
Storage
Message
Storage
Memory
Processor
Section
Central Processing Unit
The central processor unit (CPU) makes decisions about what the
processor does.