How Does A Pc Work - Omron C200HE-CPU11 Installation Manual

How Does a PC Work?

1-3 How Does a PC Work?
Block Diagram of PC
Signals
from
switches,
sensors,
etc.
and valves; affect the controlled system directly. Others; such as the indicator
lights, buzzers, and alarms; provide output to notify personnel.
Solenoid
PCs operate by monitoring input signals and providing output signals. When
changes are detected in the signals, the PC reacts, through the user-pro-
grammed internal logic, to produce output signals. The PC continually scans the
program in its memory to achieve this control.
Power Supply
Memory
Input
CPU
Programming
Device
A program for your applications must be designed, and stored in the PC. This
program is then executed as part of the cycle of internal operations of the PC.
Servomotor
Stepping motor
Signals to
Solenoids,
Output
motors,
etc.
Section 1-3
5