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System Overview SIMATIC 545/555/575 System Manual

1.1 Overview

This manual describes SIMATIC 545, 555, and 575 programmable control

systems and encompasses the following CPU models:

• PPX:545–1103, –1104, –1105, –1106

• PPX:555–1103, –1104, –1105, –1106

• PPX:575–2104, –2105, –2106

NOTE: In this manual, a feature, unless it is explicitly restricted, applies to

all systems.

The CPU models are distinguished by capacity and speed and by various

optional features. The –1103 and –1104 models of the 545 and 555 CPUs are

older models that will be superseded by the newer models –1105 and –1106.

However, all share the same programming standards, and all offer access to

PROFIBUS-DP I/O.

The systems that are described in this manual are designed for use in a

broad range of applications, including those that require discrete and analog

control. Components include the CPU and the support devices that provide

operator interface, communication, I/O control, and power.

The CPUs and their support equipment comprise computer-controlled

systems that are capable of controlling complex manufacturing systems.

These systems perform the same functions as relays, static control, or card

logic control systems. They can detect the change in state of input signals

from such devices as pushbuttons, limit switches, and analog sensors.

Acting on this information and executing a relay ladder logic (RLL) program

stored in memory, the CPU produces output signals to drive motor starters,

solenoids, pilot lights, modulating control valves, etc. These signals are used

to regulate the operation of various pieces of equipment.

A full line of discrete, analog, word, and intelligent I/O modules are

available for handling almost any input or output specification. These I/O

modules are rugged, plug-in devices capable of functioning within operating

specifications in harsh environments.

Current 545 and 555 CPUs are fully software-compatible with previous 545

and 555 CPUs. However the early model 545–1101 has a female connector

and a different electronic pinout on RS-232 port 2 compared to all other 545

and 555 CPU models, which have a male connector.

Introduction

Compatibility with

Previous CPUs

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Siemens SIMATIC TI500 Especificaciones Pagina 24