Principle Of Operation For The Programmable Controller; Functional Units; Functional Units Of The S5-100U - Siemens S5-100U User Manual

S5-100U
2.2

Principle of Operation for the Programmable Controller

The remainder of this chapter explains how your S5-100U processes your program.
2.2.1

Functional Units

CPU
Program
Timers
memory
ROM
(
operating
system)
ALU
(ACCU 1 and 2,
bit-ACCU (RLO))
Digital
modules:
- input
- output
*
Beginning with CPU 103, version 8MA02
EWA 4NEB 812 6120-02
Counters Flags
RAM
Processor
I/O bus
Analog
modules:
- input
- output
Figure 2-2. Functional Units of the S5-100U
Interrupt
Process
process
I/O image
I/O image
tables
*
tables
Memory
submodule
Serial
Function
modules
I/O modules
Technical Description
System
data
port
2-3