Series 505 System Overview; Introduction - Siemens SIMATIC TI525 Hardware And Installation Manual

SERIES 505 SYSTEM OVERVIEW

1.1

INTRODUCTION

The TI525/TI535 Programmable Controllers (PLCs) and their support
equipment are computer-controlled systems that are capable of managing the
operation of other systems. These PLCs execute 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 sensors.
Acting on this information and executing a Relay Ladder Logic (RLL) program
stored in memory, the TI525/TI535 PLCs produce output signals to drive motor
starters, solenoids, and pilot lights, etc., that regulate the operation of various
pieces of equipment.
The TI535 is an enhanced version of the TI525 that offers the following features:
D
The scan time for Boolean logic is reduced significantly (from 4
milliseconds per K words of memory to less than 1 millisecond per K
words of memory).
D
A communication port baud rate of 19,200 provides faster
communication with the Video Programming Unit (VPU ) and other
operator interfaces.
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Hardware and Installation User Manual
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CHAPTER 1