Philips System 21 Quick Operating Manual

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SYSTEM 21

QUICK

OPERATING

GUIDE

4822 872 30319

860415

1.

INTRODUCTION

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The aim of this guide is to facilitate getting started with System 21. To explore the

full possibilities of System 21 it is necessary to consult the "System 21 manual ",

which contains all the details.

System 21 consists of:

-

one master function

-

functional units

:

performs System 21 control and the communication

(transparent) with functional units.

:

perform auxilary tasks such as switching

,

scanning

,

1/0 etc.

SYSTEM 21

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IEC-625

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MAI NS

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1/0

1/0

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CONTROLLER

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MASTER

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FU

NCTIONAL

UNITS (SLAVES)

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SYSTEM 21 BUS

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ST4701

PHILIPS