Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual do Utilizador descarregar pdf (Página 8)

Introduction

Chapter 1

14

command is sometimes used synonymously to mean privileged

command.

non–privileged commands include any command that both PC’s and

RS–232–C device can send. The non–privileged commands include the

protected write and unprotected read and write commands. The

non–privileged commands are also referred to as “PLC/PLC–2 type”

commands.

Figure 1.1 illustrates the front of the 1775–KA module. The module has

the following hardware features:

Self–test diagnostic indicators

Thumbwheel switch for setting identification number

Two ports– one for Data Highway and one for RS–232–C

communication

Two sets of indicators – one for each port

Switches for selecting fault responses and communication option

Module Description

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Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual do Utilizador Página 8