Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 8)

Introduction
Chapter 1
1Ć4
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