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Introduction
This manual is designed to allow you to quickly install your DL305 Data
Communications Unit (DCU). This is the only manual you will need if your are using
the DCU as an interface for the
Direct
SOFT programming package or, as a
communications port for an operator interface. If you plan on using the DCU as a
slave interface on a
Direct
NET network, you should read the
Direct
NET manual
first. The
Direct
NET manual provides detailed descriptions of the network
configuration and protocol that is necessary to control communications with the
DCUs.
The following diagram shows the major DCU components. The address selection
switches and the communication dipswitches are of special importance. Also, there
are two versions of the DCU RS232C and RS422. You can use RS232C/RS422
converters with these units, but it is generally easier to use the version that is best
suited for your application.
Online/Offline Switch
RS232C/RS422
Communication Port
DIP Switches for communications
and Protocol Parameters
Handheld Programmer
Connector
RUN
BATT
CPU
DATA
DIAG
PWR
On when PLC is in
Run Mode
On when PLC battery
needs replacing
On when a fatel error
has occured in the CPU.
On (flashing) when data is
being transmitted
On when internal diagnostic tests
have complete and passed.
On when base power is on. If an external
power supply is used, both base power
and the external supply must be provided
for this indicator to be on.
TheDL305 DataCommunications Unit(DCU) isa communicationsinterface forthe
DL305 family of Programmable Logic Controllers (PLCs). This module is primarily
used for two reasons.
SAs a general purpose communications port to connect a personal
computer or operator interface.
SAs a network interface to a
Direct
NET network.
The following pages provide an overview of these uses, along with the information
you need to connect the DCU.
Is this the right
manual for you?
DCU Hardware
Overview
DCU Uses
