Solid state equipment has operational characteristics differing from those of
electromechanical equipment. “Safety Guidelines for the Application,
Installation and Maintenance of Solid State Controls” (Publication SGI-1.1)
describes some important differences between solid state equipment and
hard–wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid state equipment, all persons
responsible for applying this equipment must satisfy themselves that each
intended application of this equipment is acceptable.
In no event will the Allen-Bradley Company be responsible or liable for
indirect or consequential damages resulting from the use or application of
this equipment or software.
The examples and diagrams in this manual are included solely for illustrative
purposes. Because of the many variables and requirements associated with
any particular installation, the Allen-Bradley Company cannot assume
responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Allen-Bradley Company with respect to use
of information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without
written permission of the Allen-Bradley Company is prohibited.
Throughout this manual we use notes to make you aware of safety
considerations.
ATTENTION: Identifies information about practices or
circumstances that can lead to personal injury or death, property
!
damage, or economic loss.
Attentions help you:
• identify a hazard
• avoid the hazard
• recognize the consequences
Important: Identifies information that is especially important for successful
Read this chapter to familiarize yourself with the rest of the manual. You will
learn about:
• Contents of this manual
• Intended audience
• Conventions used.
This manual will tell you how to install and use your DL40 Series Dataliner
Message Display , Version 3.00.
Note: The version of your unit is displayed when you reset or power–up your
DL40.
The manual contains the following Chapters and Appendixes:
ChapterTitlePurpose
1Using This ManualAn overview of the manual.
2Introduction to the DL40Describes main features and operating
3The Run Mode –
Remote I/O
4The Run Mode –
Parallel Port
5Other Operating ModesDescribes how the DL40 operates in the
6Using the Onboard EditorA quick reference for using the Onboard
7MessagesDescribes how to use the Onboard
8Using the Parallel PortDescribes the Parallel Port and data
9
Using Remote I/O
10Installation and WiringInstallation procedures for both the
11DIP Switch SettingsSetting DIP switches for Remote I/O and
12Specifications
Appendix AError & Status Messages
Appendix BMessage Display Work-
sheets
capabilities of the DL40.
Describes how the DL40 Remote I/O
version operates in the Run Mode and
how it uses Special Messages.
Describes how the DL40 parallel version
operates in the Run Mode and how it
uses Special Messages.
other operational modes.
Editor.
Editor to edit messages and set
message options.
sampling methods.
Describes using the Remote I/O version
of the DL40 with Allen–Bradley PLCs.
Parallel Port and Remote I/O DL40s.
Parallel Port versions of the DL40.
1–1
Chapter 1
Overview
ChapterPurposeTitle
Appendix CCables
Appendix DExtended ASCII Character
Set
Intended Audience
Conventions Used
No special knowledge is needed to enter or edit messages. However, since
the Dataliner message display must be connected to peripheral equipment,
we assume you are familiar with communication terminology, especially
when using the Remote I/O version with a PLC.
The following conventions are used in this manual:
• All menus and screens reproduced in this manual are approximate
renderings of what you will see on your terminal screen. Allen-Bradley
reserves the right to make minor modifications to any menu or screen to
help improve performance.
• A symbol or word in brackets represents a single key that you press.
These include keys such as [A] or [Del]. Since the Dataliner can be
programmed with a variety of keyboards or terminals, the printing on
your keyboard may be different from the symbol or word indicated in
brackets. This manual uses ↵ to specify the carriage return function of a
keyboard. On your keyboard this may correspond to an [ENTER], ↵ , or
[Rtrn] key.
• The up caret, ^, may be used in place of the [CTRL] where space
requires. For example,
you should press [CTRL] and [W] keys simultaneously.
^W means the same as [CTRL][W]. This means
• In the following chapters we will refer to the Dataliner DL40 Series
Message Display as the DL40.
Related Publications
1–2
Other publications to which you may want to refer include:
• Dataliner DL40 Series Message Display Offline Programming Software
User Manual (Publication 2706–808)
C
hapter
Introduction to the DL40
2
Chapter
2
Figure 2Table 2
Overview
Chapter 1
Introduction to the DL40
This chapter describes some of the key features and operating capabilities of
the DL40 message display. Refer to the Table of Contents or Index for help
in locating more detailed information throughout this manual.
The DL40 Dataliner Message Display is available in two- or four-line
configurations (capable of displaying 20 characters per line) in two basic
versions:
• Remote I/O. This version is designed to enable two-way communications
with the Allen-Bradley family of Programmable Logic Controllers
(PLCs) and Small Logic Controllers (SLCs). A remote I/O DL40 can
appear to the PLC or SLC as any size I/O rack (
• Parallel Port. This version is designed to receive message number
triggers, slave addresses, and variable data from a PLC or SLC output
module via 16 data lines and 4 strobe lines (indicating the type of data).
In addition, both versions support:
1
1
/
/2, 3/4, or full).
4,
• RS-485 communications for serial message triggering or slave message
display network communications, or RS-485 networked message file
transfers with a PC Computer.
• RS-232 communications for direct message file upload and downloads
from a personal computer operating the DL40 Offline Programming
Software.
The DL40 stores messages of varying length within its own memory. Each
message is identified with a unique message number from 1 to 9999. The
stored messages are placed in an internal memory queue when triggered by a
command from your control system. They are then run according to
attributes you have selected in the DL40 system.
The DL40 can display a wide variety of characters and symbols, including:
• Uppercase letters
• Lowercase letters
• Punctuation
• Special characters from the extended ASCII character set
A person with normal vision can easily read the display from a distance of up
to 25 feet.
2–1
Chapter 2
Introduction to the DL40
Main Features
The DL40 message display is a versatile tool that comes equipped with a full
range of high-end programming and performance features. A summary of
those features appears below.
Table 2.A
Summary of DL40 capabilities
Capability
Supports offline programming softwareYesYes
PLC-5 Remote I/O PassThrough via DH+YesNo
PLC-5E Remote I/O PassThrough via EthernetYesNo
Extended ASCII character set supportYesYes
Onboard editorYesYes
Send ASCII data to a PLC via a Remote I/O linkYesNo
Send ASCII data to a device via an RS-485 linkYesYes
Communications with any programmable controllerNoYes
Backup operationsYesYes
Customizable historical events stackYesYes
Clock operationsYesYes
RS-232 and RS-485 portsYesYes
Remote I/O
Version
Parallel Port
Version
Debug ModeNoYes
Support for auxiliary devices such as slave displays and
printers
Background messagesYesYes
Hidden messagesYesYes
Embedded variablesYesYes
Data mode selectionYesYes
Message chainingYesYes
Adjustable parameters for serial communicationsYesYes
YesYes
Offline Programming Software Option (Catalog Number 2706-ND1)
You can easily and quickly create and edit application files using this offline
programming utility. You can use its interactive menus on a personal
computer to create messages, set message attributes, and download to one or
more DL40 message displays.
2–2
Chapter 2
Introduction to the DL40
Figure 2.1
Easy to understand, menu–driven interface that helps guide you through the program
PLC-5 Remote I/O PassThrough allows you to upload and download
message files from a computer to a DL40 connected by remote I/O to a
programmable Logic Controller on the DH+ link. There is no need to
connect separate wiring from the computer to the DL40. PassThrough is
available only on Series D or higher DL40 message displays. A summary of
compatible PLCs appears on page 2 – 11.
2–3
Chapter 2
Introduction to the DL40
Figure 2.2
Remote I/O PassThrough via DH+
Computer
DH+ Network
Remote I/O Link
DL40
Remote I/O Link
DL40DL40
PLC-5E Remote I/O PassThrough Via Ethernet
PLC-5E Remote I/O PassThrough allows you to upload and download
message files from a computer to a DL40 connected by remote I/O to a
programmable Logic Controller on the Ethernet link. There is no need to
connect separate wiring from the computer to the DL40. PassThrough is
available only on Series D or higher DL40 message displays. A summary of
compatible PLCs appears on page 2 – 11.
Figure 2.3
Remote I/O PassThrough via Ethernet
Computer
Ethernet Network
2–4
Remote I/O Link
DL40
Remote I/O Link
DL40DL40
Support for Extended ASCII Character Set
The extended ASCII character set allows you to create messages in alternate
languages such as French, German, Italian, and Spanish with the Offline
Programming Software (Revision 2.0 or greater) and displayed on a DL40
(Revision 2.0 or greater).
Chapter 2
Introduction to the DL40
Onboard Editor
The onboard editor lets you create or edit messages, select message
attributes, and set options and variable formats on a Version 2.00 or later
DL40 message display using any of a number of standard keyboards.
Send ASCII Data to a PLC Via a Remote I/O Link
Using Remote I/O communications, you can send ASCII data to your PLC.
Simply attach an IBM compatible keyboard to the DL40 message display,
and you can enter parts numbers, badge numbers, and similar information as
required. The DL40 processes and displays the information, and then sends it
on to the controller.
You can enter bar code data using a wedge attached to an Allen-Bradley bar
code scanner. The DL40 displays scanned bar code information, then sends
the data to the PLC through the Remote I/O. Refer to Publications 2755-824
and 2755-824.1 for information on applications using Allen-Bradley wedges.
You can establish similar communications over an RS-485 link.
Communications with Any Programmable Controller (Parallel Port
Version)
The DL40 can accept information from any programmable controller over a
total of 20 input lines (16 data and 4 strobe lines).
Parallel Port versions of the DL40 also have a 12 VDC terminal that can be
used to power outputs that pull data and strobe lines high.
Backup Operations
You can archive DL40 applications files in a number of ways.
Personal computer hard diskNoYes
Floppy disk or micro disketteNoYes
Tape on Allen-Bradley data recorder
Cat. No. 1770-SA
Cat. No. 1770-SB
YesYes
2–5
Chapter 2
Introduction to the DL40
Historical Events Stack
With the DL40’s Historical Events Stack you can record the occurrence and
sequence of some or all of the messages or variable data values that have
been triggered and/or displayed. The 16K bytes of memory available for this
record will hold about 1,000 events. You can view this record on the DL40
itself, or obtain a printout for offline reference.
Clock Operations
The DL40 contains a real-time battery-backed clock that will keep accurate
time even when power is removed from the unit. The DL40 can display the
current time and/or date in either AM/PM or 24-hour military format.
Date and time information can be displayed as part of any triggered message,
and passed on to a PLC. You can also date- or time-stamp events as they are
recorded in the Historical Events Stack.
You can set the DL40 internal clock from the front panel menus, from a PLC,
or through the Offline Programming Software.
RS-232 and RS-485 Ports
The DL40 has both an RS-232 and RS-485 port.
The RS-232 port can be used to:
• upload or download message files from a computer
• upload or download message files using a data (tape) recorder
The RS-485 port can be used to:
• trigger messages with or without variable data content
• multi-drop upload or download message files from a personal computer
• send messages to slave message displays
• input ASCII data via keyboard or wedge
Debug Mode (Parallel Port Version)
2–6
The DL40 allows you to display the binary status (1 or 0 value) of both the
strobe and data lines to check the output of a programmable controller.
Chapter 2
Introduction to the DL40
Auxiliary Devices
You can connect a variety of useful auxiliary devices to the DL40 message
display as needed to meet your own unique needs.
• Slave displays. You can address up to 126 DL10 or DL50 slave displays
over an RS-485 network at distances up to 2,500 feet (762 m) from the
originating DL40. You can also control the annunciation relay on remote
DL50 Series slave displays. By assigning a specific address to each slave
display, you can control which slaves receive and display a given
message.
• Printers. A serial printer allows you obtain a hard copy of the Historical
Events Stack or a listing of the internal application file itself. The time
and date that a message was triggered can be included on the stack
printout if you so desire. You can also set message attributes so that
triggered messages will be sent via RS-232 immediately to the printer.
• Alarms. The alarm relay permits an external remote alarm or warning
light to be activated and deactivated. Individual message attributes can be
set to energize or de-energize the alarm relay contacts
ATTENTION: The DL40 alarm relay should be used for
annunciation purposes only. It may not be used for control
!
applications.
Background Messages
You can specify a background message that will be displayed whenever the
DL40 has no other triggered messages in the queue to run.
Hidden Messages
You can also create hidden messages which will not appear on the DL40
display or have any affect on what is being displayed, but can be sent to a
slave display, printed, or stored on the Historical Events Stack.
Embedded Variables
The messages you create on the DL40 can contain variable data in response
to changing data input. Incoming variable data can be binary, BCD (binarycoded decimal), and/or ASCII. You can also embed time and date
information in a message from the DL40’s internal battery-backed real-time
clock.
2–7
Chapter 2
Introduction to the DL40
Data Mode Selection
When using the DL40 message display, you can select from two data modes
• binary
• Binary Coded Decimal (BCD) either signed or unsigned
Within any application, triggers and variable data can be in either form. For
example, message triggers can be in a binary format, while variable data can
be BCD.
Message Chaining
The DL40 allows you to create a chain of messages for display in sequence.
Only the first event in the chain need be triggered from outside. Then each
message in the chain can trigger the next until the complete sequence has
run.
Adjustable Parameters for Serial Communications
With the DL40 you can configure RS-232 or RS-485 port parameters as
needed for compatibility with printers, data recorders, slave displays, or
control computers. Configurable parameters include:
• Baud Rate. Available baud rates include:
300 4800
1200 9600
240019200
• Parity. You can transmit data with:
Odd parity
Even parity
No parity
• Handshake. You can choose from:
Software
Hardware
None
• Data Bits per Character. Either 7 or 8
• Null Count. From 0 to 255. This setting allows you to send a string of
nulls to the printer between characters. It is useful with slower printers
that drop characters because they can’t keep up with normal DL40 output.
• Page Width. Between 20 and 132 characters
2–8
Chapter 2
Introduction to the DL40
Operating Modes
The DL40 Message Display offers a number of operating modes from which
to choose. Each provides you with the tools you need to perform a different
set of functions. The following paragraphs and the tables that accompany
them provide a brief overview of the various operating mode options
available to you.
Run Mode
Run Mode is the normal operating mode for the DL40. In Run Mode
messages are triggered for display on the DL40 and (if desired) on slave
message displays.
The Remote I/O version of the DL40 always comes up in the Run Mode after
reset. The Parallel Port version does, too, except when the message display’s
Run Mode/Debug DIP switch is set to Debug.
Remote I/O DL40s offer four types of Run Modes:
• Message/Variable/Slave
• Message/Variable
• Message List
• Bit Trigger
Parallel Port DL40s offer two types of Run Modes:
• Message/Variable/Slave
• Message List
You can select the type of run mode you want as an Option using the
Onboard Editor or Offline Programming Software.
Other Operating Modes
In addition to the Run Modes described above, the DL40 offers the following
operating modes:
• Help Mode
• Historical Recall Mode
• Remote Program Mode
• Backup Mode
• Set RS-232/RS-485 Port Mode
• Clock Mode
• Print Mode
• Debug Mode (on parallel port versions only)
2–9
Chapter 2
Introduction to the DL40
Note that you will use the Remote Program Mode whenever you use the
Offline Programming Software.
Special Messages
Triggering Special Messages gives you the ability to monitor and control
certain functions of the DL40 without leaving Run Mode. These messages
normally occupy Message Numbers 901 to 916. You can move Special
Messages to Message Number 1 to 16, or disable them with the Offline
Programming Software or Onboard Editor. You will find a complete
explanation of Special Messages in Chapter 5.
System Requirements for
Remote I/O Without
PassThrough File Transfers
2–10
The following is a list of PLCs and SLCs that are applicable for Remote I/O
communications with the DL40 message display.
• PLC-5/11, 5/15
➀
, 5/20, 5/25, 5/30, 5/40, 5/60, 5/250
• PLC-2, PLC-5/10, 5/12 with Catalog Number 1771-SN Scanner
• SLC-5/02, 5/03, 5/04 with Catalog Number 1747-SN Scanner
➀
If you are using a PLC-5/15 with partial rack addressing and block transfers, you must use Series B, Rev. J or
later.
➁
Block Transfer requires a Series B or later Scanner.
➁
Chapter 2
Introduction to the DL40
System Requirements for
Remote I/O PassThrough
Using DH+
The following tables list the Allen-Bradley PLCs and computer interface
boards that are applicable for PassThrough file transfers with the DL40
message display over a DH+ link as of this printing.
Table 2.D
Applicable PLC types for PassThrough file transfers over DH+
PLC Types
PLC-5/11AllAll
PLC-5/15BN or later
PLC 5/20AllAll
PLC 5/25AJ or later
PLC 5/30AB or later
PLC 5/40
PLC 5/60
PLC 5/80AllAll
PLC 5/250AllAll
Table 2.E
Applicable interface boards and modules for PassThrough file transfers over DH+
SeriesRevision
A
B
A
B
E or later
B or later
System Requirements for
Remote I/O PassThrough
Using Ethernet
Catalog No.
1784-KT
1784-KTX
1784-KLInterface board for Allen-Bradley 1784-T45 or -T47
1784-KT2Interface module for IBM PS2
1770-KF2Serial to DH+ interface module
1784-PCMKPCMCIA interface board
➀
Requires 2706-ND1 Series D Ver 3.0, which includes Interchange drivers.
1
/2-slot interface board
1
/2-slot interface board
Description
➀
The following table lists the Allen-Bradley PLCs that are applicable for
PassThrough file transfers with the DL40 message display over an Ethernet
link as of this printing.
Table 2.F
Applicable PLC types for PassThrough file transfers over Ethernet
PLC Types
PLC 5/40E
PLC 5/60E
PLC 5/80EAllAll
SeriesRevision
A
B
A
B
E or later
B or later
PLC 5/250AllAll
2–11
Chapter 2
Introduction to the DL40
Use one of the Allen-Bradley Ethernet computer interface boards (or its
equivalent) for PassThrough file transfers.
• Catalog Number 6628-A5
• Catalog Number 6628-A7
Catalog Numbers
Compatible Keyboards
DL40 Message Displays are available with varying amounts of memory in
either two- or four-line versions.
Table 2.G
Product Identification and Catalog Numbers
Description
Two Line Display16 K Message
Two Line Display32 K Message
Four Line Display32 K Message
Four Line Display64 K Message
Four Line Display128 K Message
Memory Size
Memory
Memory
Memory
Memory
Memory
The following keyboards are compatible with the DL40 Message Display.
Table 2.H
Applicable keyboards for use with the DL40 Message Display
Allen-Bradley industrial computer standard
keyboards
IBM-PC or compatible -XT, -AT standard keyboard
IBM-PC or compatible -PC enhanced keyboard
Description
NOTE: When used with the DL40, the Num Lock and Caps Lock indicators
will not illuminate. We recommend you use the 1784-T60 terminal keyboard
with Num Lock turned off.
Chapter 2
Introduction to the DL40
Options & Accessories
The following options and accessories are available from Allen-Bradley for
the DL40 message display.
Table 2.I
Options and accessories for the DL40 message display
Item
Offline
Programming
Software
Memory
Modules
Communication
Cables
120 Volt
Parallel Input
Converter
NEMA
Enclosure
Keyboard Front
Panel Access
Kit
RS-232 Front
Panel Access
Kit
Three 31/2 inch micro diskettes2706-ND1
Solid state backup for files and messages16 Kbyte
For connecting the DL40 to a range of PCs, converters, and
recorders. Refer to Appendix B for detailed information on
cables.
Converter to connect 120 VAC input voltages to parallel input
port (2 required for each DL40)
NEMA Type 12/13 enclosure complete with mounting holes
and cutout for one DL40 display. Access door is gasketed.
Enclosure for two-line DL40
Enclosure for four-line DL40
Panel mount 8-pin DIN keyboard connecter, NEMA 4 panel
access cover, keyboard extension cable
Panel mount 9-pin D shell connector, NEMA 4 panel access
cover, DL40 RS-232 extension cable
DescriptionCatalogNo.
2706-NMM16
32 Kbyte
64 Kbyte
2706-NMM32
2706-NMM64
2706-NC12
2706-NC13
2706-NC14
2706-NC15
2706-NG2
2706-NE1
2706-NE2
2706-NKAK1
2706-NDAK2
2–13
C
hapter
The Run Mode – Remote I/O
3
Chapter
3
Figure 3Table 3
Overview
Chapter 2
The Run Mode – Remote I/O
This chapter describes the operations of the Run Mode for the Remote I/O
version of the DL40. It also describes the use of Special Messages. Refer to
Chapter 4 for information on the Run Mode for Parallel versions of the
DL40. See Chapter 6 for information on other operating modes.
Run Mode is the normal operating mode for the DL40. In Run Mode,
messages are triggered for display on the DL40 and (if desired) on slave
message displays.
The Remote I/O version of the DL40 always comes up in the Run Mode after
reset.
Remote I/O DL40s offer four types of Run Modes:
• Message/Variable/Slave
• Message/Variable
• Message List
• Bit Trigger
You can select the type of run mode you want as an Option using the
Onboard Editor or Offline Programming Software. Table 3.A provides an
overview of the differences among Run Mode Types.
Important: A message completes running when either:
• the Wait Time expires
• message is acknowledged
• message completes printing
• message is sent to slave(s)
• handshaking is complete
• all ASCII Input Data is entered
3–1
Chapter 3
The Run Mode – Remote I/O
Table 3.A
Summary of Remote I/O Run Mode Types
Feature
Trigger messagesTrigger a message with 1 to 40 variables, depending
Triggering method
Send messages to slave
display
Send variables to place in
message
Variable typesBinary – Signed and Unsigned BCD
HandshakingYes
Message/Variable/Slave
Run Mode
on rack size, trigger method, and variable type
1
/4 rack – Block
Transfer only
1
/2, 3/4, full rack –
Discrete I/O or Block
Transfer
Keyboard
RS-485 link
Slave address for each
message can be
specified with message
trigger. (Overrides
address specified as
Message Attribute)
Up to 10 (16 bit) binary or (4 digit) BCD
Up to 20 (8 bit) ASCII
Up to 40 (4 bit) BCD
ASCII
Message/Variable Run
Mode
Discrete I/O or Block Transfer
Keyboard Port
RS-485 link
Slave address specified as a Message Attribute
Message List Run
Mode
Triggers a message list
of up to 20 messages in
Round Robin Order
No
Not Applicable
Bit Trigger Run Mode
Triggers a Priority
Message and up to 496
messages in Priority
and/or Round Robin
Order
Discrete I/O or Block
Transfer
Keyboard (for Priority
Message only)
RS-485 link (for
Priority Message only)
Diagnostic code sent to PLCYes
Message acknowledgementYes
Input and display of ASCII
input data (via keyboard port)
Return ASCII input data to
PLC via Remote I/O port
Return ASCII input data via
RS-485 port
Put message on Historical
Events Stack
Message/Variable/Slave
Run Mode
Up to 20 ASCII characters
Discrete I/O – Up to 12 characters, depending on rack size
Block Transfer – Up to 20 characters, independent of rack size
Up to 20 characters, independent of rack size
Yes
In the Message/Variable/Slave Run Mode you can:
Trigger Messages Via a PLC Using the Remote I/O Port
You can trigger a single message by either discrete I/O or a Block Transfer
Write. See Chapter 10 for more information.
No
3–2
Chapter 3
The Run Mode – Remote I/O
Trigger Messages Via the Keyboard Port Or the RS-485 Port
See Chapter 8 for more information.
Send Variables to be Included In Message
Your PLC can include variables with the message trigger. Up to the
equivalent of 6 full word variables can be sent if using Discrete I/O
(depending on rack size) or up to the equivalent of 10 full word variables can
be sent using a Block Transfer Write (independent of rack size). See Chapter
10 for more information.
Variable types include:
• 16 bit binary (1 variable per word)
• 8 bit ASCII (2 per word)
• 4 digit signed Binary Coded Decimal (BCD) (1 per word)
• 1 digit (4 bit) unsigned BCD (4 per word)
You can send variables via an RS-485 link or the DL40 Keyboard Port. See
Chapter 8 for more information.
Insert ASCII Input Data Into a Message
Use the DL40 Keyboard Port to input ASCII data intended for display.
• A request for ASCII Input Data can be placed in a message by inserting a
[CTRL][X]. See Chapter 6 for more information.
• Up to l20 ASCII characters can be requested for each message triggered
using Discrete I/O or Block Transfer Write.
• Requests for ASCII data can be strung together to form inputs up to 20
ASCII characters long.
• While a message is running, enter the ASCII character or string of ASCII
characters followed by a [↵ ].
See Chapter 8 for more information.
Return ASCII Input Data to a PLC
Via Remote I/O
Up to 12 ASCII characters (depending on rack size) are returned via Discrete
I/O. Up to 20 ASCII characters are returned via Block Transfer Read.
When all required ASCII data has been entered, the message will time out
and the Enter Bit in the Input Image Table will be set. It is only after this bit
3–3
Chapter 3
The Run Mode – Remote I/O
is set that the data should be considered valid. See Chapter 10 for more
information.
Via RS-485 Port
Up to 20 ASCII characters (independent of rack size) are returned via the
RS-485 Port. See Chapter 8 for more information.
Return the Message Number of the Message Being Run to a PLC
This is automatically done in the Remote I/O scan. See Chapter 10 for more
information.
Send Real Time Clock Or Date Data to a PLC
Triggering Special Message 912 (or 12) will cause the DL40 to send
•
clock data to a PLC.
• Triggering Special Message 913 (or 13) will cause the DL40 to send date
data to a PLC.
Information on Special Messages appears in Chapter 5. See Chapter 7 for
more information on formatting time and date data.
Put Messages on Historical Events Stack
Both triggered messages and variable data can be put on the 16 Kbyte
Historical Events Stack. The contents of the stack can be viewed on the
DL40 display or printed:
• in chronological order
• by number or occurrences
See Chapter 6 for more information.
Require Handshake Between DL40 and PLC
Handshaking provides an indication to the sender (either the DL40 or the
PLC) that Image Table Data was received. See Chapter 10 for more
information.
Override Slave Address Selected as a Message Attribute with an
Address Sent with the Message Trigger
3–4
Note: For this mode only, if your DL40 is configured as a
you must specify the slave address as a Message Attribute.
1
/
rack device,
4
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