Allen-Bradley 1784-KT/B Installation and user guide

Communication Interface Module
Installation Data
Cat. No. 1784-KT/B
The 1784-KT/B Communication Interface Module allows personal
computers, workstations or terminals to communicate with Allen-Bradley
processors and controllers, either through direct connections or over Data
Highway Plus networks. For information about using the 1784-KT/B with
a specific device, see the device’s user documentation.
ATTENTION: The following provides information for
Allen-Bradley Industrial Computer and Communication Group
(ICCG) products that have been verified to meet the
Electromagnetic Interference (EMI) requirements of the Federal
Communication Commission (FCC) and the Canadian
Department of Communications for use in a commercial
environment:
This device complies with Part 15 of the FCC rules. Operation
is subject to the following two conditions: (1) this device may
not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause
undesired operation.
ATTENTION: This digital apparatus does not exceed the
Class A limits for radio noise emissions from digital apparatus
set out in the Radio Interference Regulations of the Canadian
Department of Communications.
Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux appareils
numériques de la class A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par le ministère des
Communications du Canada.
Introducing the 1784KT/B
Communication Interface
Module

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
2
We will refer to the 1784-KT/B Communication Interface Module as
simply the 1784-KT throughout this document.
This document contains the following sections:
Introducing the 1784-KT Communication Interface Module
Important User Information
Features of the 1784-KT
Compatibility
How the 1784-KT Operates
Handling the 1784-KT Module
1784-KT Configuration Information
Installing the 1784-KT into a Computer
Connecting Your 1784-KT
Ordering Information
The Loopback Test Plug
System Memory and Interrupts
Specifications
Because of the variety of uses for products described in this publication,
those responsible for the application and use of this control equipment
must satisfy themselves that all necessary steps have been taken to assure
that each application and use meets all performance and safety
requirements, including any applicable laws, regulations, codes and
standards.
The illustrations, charts, sample programs and layout examples shown in
this guide are intended solely for purposes of example. Since there are
many variables and requirements associated with any particular
installation, Allen-Bradley does not assume responsibility or liability (to
include intellectual property liability) for actual use based upon the
examples shown in this publication.
Allen-Bradley publication SGI-1.1, “Safety Guidelines for the Application,
Installation and Maintenance of Solid State Control” (available from your
local Allen-Bradley office) describes some important differences between
solid-state equipment and electromechanical devices which should be
taken into consideration when applying products such as those described in
this publication.
Reproduction of the contents of this copyrighted publication, in whole or
in part, without written permission of Allen-Bradley Company, Inc. is
prohibited.
What This Document
Contains
Important User Information

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
3
ATTENTION: With any complex communication system you
need to identify potential application-related communication
problems and make provisions in the system design to prevent
hazardous or undesired consequences if a problem occurs.
These problems include, but are not necessarily limited to, the
possibility of:
unexpected loss of communication
erroneous or incomplete data being supplied to the network
and passed on to your application
Your 1784-KT Communication Interface Module is an ISA half-size 8-bit
card that can be inserted into any 8- or 16-bit ISA expansion slot. The
1784-KT provides the following features:
Makes your personal computer an active node on Data Highway Plus
networks
Increases application response time by removing the RS-232 bottleneck
Provides single cable connection to a PLC-2, PLC- 3, or PLC-5
family programmable controller
Is address selectable; may be used with other option boards installed in
your personal computer
When combined with 6001-F1E software or INTERCHANGE
software, allows you to create your own custom interface to Data
Highway Plus networks
Supported by the following software:
- 6001-FIE software
- 6200 software
- INTERCHANGEsoftware
- Advisor PC(series E or later)
- ControlViewsoftware
Features of the 1784KT

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
4
Operation of the 1784-KT has been verified with the following:
Company: Model:
AllenBradley •1771 Information Processor
(1771DSX2) (requires KT Expander
Module 1771DXKT)
•1784T35 Industrial Terminal
•1784T50 Industrial Terminal
•AllenBradley 6121
•AllenBradley 6122
•T53 Industrial Programming Terminal
6160T53
•T60 Industrial Workstation
6160PCD2, PCN2, PCD4, PCN4
•T70 Industrial Workstation
6170 series
IBM•IBM PCXT/AT
Compaq•Compaq Portable286
•Compaq Portable II
•Compaq Portable III
•Compaq Deskpro286
•Compaq Deskpro 386
Dell•Dell 316 386SX
Samsung •Samsung S550
•Samsung 386
HewlettPackard•HP 9000/700 series
The 1784-KT allows you to:
directly connect to:
- PLC-2 processors
- PLC-3 processors
communicate with nodes on Data Highway Plus networks (including
PLC-5 and PLC-5/250 processors)
communicate with SLCprocessors (requires 1785-KA5 bridge)
The 1784-KT performs data transmission, management, and local Data
Highway Plus diagnostics. The interface to the host processor is through a
board-resident dual-port memory that passes preformatted Data Highway
Plus packets.
When the host powers up and downloads module code, it runs diagnostics
to verify the 1784-KT module’s operation. Allen-Bradley interface
software (including 6001-F1E, 6200, Interchange, Advisor PC, and
ControlView) manages data transmission and reception through the
board-resident dual-port memory.
Compatibility
How
the 1784KT Operates

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
5
The 1784-KT utilizes CMOS technology, which is highly sensitive to
Electro Static Discharge (ESD). ESD may be present whenever you are
handling the 1784-KT. Handling the 1784-KT without any ESD protection
can cause internal circuit damage that may not be apparent during
installation or initial use. A grounding wrist strap has been shipped with
the 1784-KT to be worn during the installation procedure. Instructions for
use of the strap are found on the back of its package.
ATTENTION: The following is a list of precautions to guard
against ESD damage:
1. Before handling the module, be sure to wear the provided
static strap and touch a grounded object to discharge any
built-up static charge.
2. When selecting your memory and interrupt options, avoid
touching other components on the 1784-KT.
3. Avoid touching the back plane connector or interface
connector pins located on the 1784-KT.
4. If the module is not in use, store the 1784-KT in the static
bag that the module was shipped in.
Important: Do not change the (factory set) configuration settings until
you have read this section.
The 1784-KT comes with preset memory location (D400) and no interrupt.
This may not be appropriate for your application. See the section
“Installing the 1784-KT into a Computer”, which begins on page 6, for
information on memory locations and interrupt settings.
ATTENTION: When selecting configuration settings, check
for conflicts with other interface cards and system memory. If
there is a conflict, the system will not operate properly.
Handling the 1784KT Module
1784KT Configuration
Information

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
6
The following steps outline how to install the 1784-KT into a terminal,
workstation or computer. Refer to the terminal’s, workstation’s or
computer’s hardware user manual for further assistance.
1. Turn off the computer and disconnect the ac power cord.
2. Remove all covers necessary to gain access to the computer’s
expansion slot area. The industrial terminals may have retainer
brackets. Consult the user manual for access procedures.
ATTENTION: If you are not wearing the grounding wrist
strap, put it on at this time.
3. Remove the expansion slot bracket that covers the computer I/O
opening.
4. Remove the 1784-KT from the static bag.
5. Verify the configuration settings for your system. Use the worksheets
that begin on page 15 for assistance.
Important: If another card is already using your desired switch settings,
you will have to change the card’s switch settings to an open memory
location.
If you are using the default settings, go to step 10.
If you are not using the default settings, go to step 6.
6. Select a memory location. Table A shows the recommended memory
locations for Allen-Bradley terminals, workstations and computers.
Table B shows all the available memory locations and switch settings
for the card.
Table A
Recommended
memory settings
Equipment: Preferred Memory Location:
1784T35 C800
1784T50 C000
T53 Industrial
Programming Terminal
D400
T60 Industrial
Workstations
D000, D400, or D800
T70 Industrial
Workstations
D400
Installing the 1784KT
into a Computer

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
7
Table B
Selecting
a memory location
Memory
Address (Hex)
PCB Board Switch Settings Switch
Settings2
M L
S S
B B
A14
(switch 1)
A15
(switch 2)
A16
(switch 3)
A17
(switch 4)
A18
(switch 5)
A19
(switch 6)
LM
SS
BB
A000:0000 up up up down up down 000101
A400:0000 down up up down up down 100101
A800:0000 up down up down up down 010101
AC00:0000 down down up down up down 110101
B000:0000 up up down down up down 001101
B400:0000 down up down down up down 101101
B800:0000 up down down down up down 011101
C000:0000 up up up up down down 000011
C400:0000 down up up up down down 100011
C800:0000 up down up up down down 010011
CC00:0000 down down up up down down 110011
D000:0000 up up down up down down 001011
1D400:0000 down up down up down down 101011
D800:0000 up down down up down down 011011
1This is the factoryset address and is the recommended setting. Some system peripherals (such as VGA cards)
may require a different address. Check your system peripheral's documentation to see if it requires different
settings.
2This is the 6200 software online configuration setting for the 1784KT.
up = 0
down = 1
7. Select an interrupt setting. Your choices are:
- IRQ3
- IRQ4
- IRQ5
- IRQ7
- no interrupt
Table C shows the recommended interrupt settings for Allen-Bradley
industrial terminals, workstations and computers that use
the 1784-KT.

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
8
Table C
Recommended
interrupt settings
Equipment: Preferred Interrupt:
1784T35 IRQ5
1784T50 IRQ5
T53 Industrial
Programming Terminal
no interrupt
T60 Industrial
Workstations
T70 Industrial
Workstations
8. Set the memory location address, by pushing the switches in at either
the top or bottom, to reflect the selected address of the memory
location.
Interrupt Jumper
(shown in no interrupt"
position)
Address Switch
(shown at D400:0000 setting)
Up = 0
switch pressed
in at top
Down = 1
switch pressed
in at bottom

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
9
9. Set the interrupt by placing the provided jumper in the proper
location.
Remove the jumper and place it on the two pins that correspond to
the interrupt of your choice. If an interrupt is not required by your
software program, place the jumper in the “no interrupt” position.
Jumper
INT 3 position
INT 4 position
INT 5 position
INT 7 position
no interrupt
Jumper
Selection
INT 3
INT 4
INT 5
INT 7
Interrupt
Selection
IRQ3
IRQ4
IRQ5
IRQ7
no interrupt
18305
(Factory Default setting: no interrupt.)
This end is facing
toward the PCB
gold fingers.
10. With a hand on each end of the board, slowly slide the 1784-KT into
the I/O expansion slot. Firmly insert the edge card connector into the
I/O expansion slot connector.
11. Install the retaining screw into the retaining bracket and tighten.
12. Install all brackets (if applicable) and covers removed in step 2.
Different configurations require different procedures for connecting the
1784-KT to a PLC. The procedures begin on page 10. Before you make the
connections, make sure you have the correct cables. Cables for various
PLCs are listed below.
For: Use Cable with Cat. No.: See Page:
PLC2 Family Programmable Controllers 1784CP2 10
PLC3 Family Programmable Controllers 1784CP3 11
PLC5/10, 5/12, 5/15,5/25, 5/VME (6008LTV), and
PLC5/250 Programmable Controllers
1784CP 12
PLC5/11, 5/20, 5/30, 5/40, 5/60, 5/80, and
5/VME (1784V40) Programmable Controllers
1784CP6 (refer to
publication 17842.26)
or
1784CP7 Adapter with
1784CP Cable (refer to
publication 17842.29)
Connecting Y our 1784KT

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
10
ATTENTION: To avoid personal injury, always disconnect the
ac power before making the cable connection.
Connecting Y our 1784KT to a PLC2
To connect the 1784-KT to a PLC-2, follow the steps below:
1. Plug the 62-pin connector end of the 1784-CP2 cable into the
1784-KT and secure with captive screws.
1784 - KT
Board
Program
Panel"
1784 - CP2 Cable
16687a
2. Connect the opposite end of the 1784-CP2 cable into the PROGRAM
PANEL connector on the PLC-2.
3. Reinstall the ac power cord and turn on the computer.
Figure 1 shows cable pinouts for the 1784-CP2 cable.
Figure 1
Cable
Pinouts for the 1784CP2 Cable
4
5
6
48
7
27
26
1
2
3
4
7
8
A2 TXD
A2 TXD RET
A2 OUT0 RET
A2 OUT0
A2 RXD RET
A2 IN0 DET
A2 RXD
47
6
5
A2 IN0
Cable shield
tied to chassis
62 pin
D - shell
16688
To
Program Panel"

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
11
Connecting Y our 1784KT to a PLC3
To connect the 1784-KT to a PLC-3, follow the steps below:
1. Plug the 62-pin connector end of the 1784-CP3 cable into the
1784-KT and secure with captive screws.
1784 - KT
Board
Peripheral
Channel 0"
1784 - CP3 Cable 16687b
2. Connect the opposite end of the 1784-CP3 cable (labeled “Industrial
Terminal End”) into the PERIPHERAL CHANNEL 0 connector on
the PLC-3.
3. Reinstall the ac power cord and turn on the computer.
Figure 2 shows cable pinouts for the 1784-CP3 cable.
Figure 2
Cable
Pinouts for the 1784CP3 Cable
1
2
12
24
3
22
17
1
14
3
18
A1 TXD
A1TXD RET
A1 IN0
Chassis Gnd
A1 RXD
A1 IN1
Signal Gnd
23
25
A1 TXD RET
62 pin
D-shell
46
43
25
44
A1 OUT0
A1 OUT1
A1 IN2
16689

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
12
Connecting Y our 1784KT to a PLC5 (Data Highway Plus)
To connect the 1784-KT to a PLC-5, follow the steps below:
1. Plug the 62-pin connector end of the 1784-CP cable into the 1784-KT
and secure with captive screws.
1784 - KT
Board
Peer Communication
Interface Connector
1784 - CP Cable
PLC - 5 Family Processor
16687c
2. Connect the opposite end of the 1784-CP cable into the PEER
COMM INTFC connector on the PLC-5.
3. Reinstall the ac power cord and turn on the computer.
Important: To allow communication between PLC-5s and other Data
Highway Plus nodes, you must be connected to a PLC-5 using a 1784-CP
cable. The Data Highway Plus network is connected to the PLC-5.
Figure 3 shows cable pinouts for the 1784-CP cable.
Figure 3
Cable
Pinouts for the 1784CP Cable
36
34
1
2
3
4
Shield
L1
35
5
L2
6
7
8
To Peer
Communication
Interface
White
Blue
14732

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
13
The 1784-AGT Test Plug is available for diagnostic testing of the
1784-KT. Its internal wiring is shown below.
1
2
4
8
3
6
5
23
24
43
26
47
28
A1 TXD
A1 TXD RET
A1 IN0
A2 TXD
A2 OUT0
A3 TXD+
A2 TXD RET
748
27
A2 OUT0 RET
A1 RXD
A1 RXD RET
A1 OUT0
A2 RXD
A2 RXD RET
A2 IN0
A2 IN0 RET
A3 RXD+
9
10
12
16
11
14
13
15
29
30
31
34
36
58
59
35
17
18
20
33
19
22
21
32
38
37
40
39
56
50
49
55
41
42
45
44
52
51
57
62
61
25
46
54
60
53
A3 RXD-
A3 IN0+
A3 IN0-
A4 RXD+
A4 RXD- RET
A3 TXD-
A3 OUT0+
A3 OUT0-
Chassis Gnd
A4 TXD RET
A4 TXD
A4 1N0+
A4 IN0- RET
A4 IN1+
A4 IN1- RET
A3 IN1+
A3 IN1-
A4 OUT0
A4 OUT0 RET
A4 OUT1
A4 OUT1 RET
Sig gnd
A3 OUT1-
Sig Gnd
A3 OUT1+
A4 OUT2 RET
A4 OUT2
A1 IN1
A1 IN2
A3 OUT2+
A3 OUT2-
A4 IN2+ RET
A4 IN2-
A1 OUT1
A1 OUT2
A3 IN2-
A3 IN2+
1
1
1
1
2
2
2
2
2
1784 - AGT
14982
All unidentified pins are reserved for future use
1 = PLC2 2 = PLC3
The Loopback T est Plug

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
14
Information is passed between the computer system and the 1784-KT
through 2 Kbytes of memory located in the interface module. This 2 Kbyte
memory is memory mapped into an open memory location in your
computer system. The definition of “open” is a location that has not been
configured for another optional interface card or system. The 1784-KT
address decoding allocates a 16 Kbyte memory location. So, when
selecting an open memory location, make sure there is a 16 Kbyte block.
Also, the definition of open applies to hardware system interrupts.
Depending on the interface card you have installed into your computer,
only a few select interrupts may be open for the 1784-KT.
Let’s say the targeted computer for installing a 1784-KT is an IBM PC-AT
with the following options:
640 K System Memory 00000:000009000:FFFF  
EGA Card 0A000:00000A000:FFFF  
Color Monitor 0B000:00000B000:FFFF  
Diskette Drive  3F03F7 IRQ 6
Hard Drive  1F01FF IRQ 14
Serial Port Card  2F82FF IRQ 4
(Configured for port 1)
The memory map for this system would be what is documented in the
“System Memory Allocation Worksheet” (see page 15) for the IBM
PC-AT. Open memory for a 1784-KT would be from 0B800:0000 to
0DF00:0FFF. By using the memory default setting, the 1784-KT would fit
into this open memory at locations 0D400:0000 to 0D700:0FFF.
The 1784-KT supports four interrupts: IRQ3, IRQ4, IRQ5, and IRQ7.
Refer to the “Hardware Interrupt Allocation Worksheet” (page 17) for the
IBM PC-AT for possible open interrupts. Only IRQ4 is used for the serial
port card configured for port 1. The 1784-KT uses the “no interrupt”
setting as the default.
Use the following worksheets to help manage your system’s memory, I/O,
and interrupt assignments. The IBM PC-AT and IBM PC-XT system
assignments have been chosen as a reference. These IBM assignments are
available in their respective IBM Technical Manuals and are subject to
change by IBM.
Important: The 1784-KT does not require a system I/O address. The
1784-KT only uses addressable memory and an interrupt. The I/O map is
provided so that you can document your entire computer system.
To use the worksheets, enter your computer’s memory, I/O, and interrupt
assignments in the column labeled “Your System” .
System Memory and
Interrupts

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
15
IBM PC A T System Memory Allocation W orksheet
System Memory IBM PC AT Assignments Y
our System
0000:0000
07000:FFFF
512K Read/Write
Memory on System Board
8000:0000
09000:FFFF
128K Read/Write Memory
Expansion in I/O Channel

A000:0000
A400:0000
A800:0000 E.G.A.
AC00:0000
B000:0000
B400:0000 Color/Graphics
B800:0000
BC00:0000
C000:0000
C400:0000
C800:0000
CC00:0000
D000:0000
D400:0000
D800:0000
E000:0000
E00:FFFF
64K ROM Reserved
on System Board
F000:0000
F000:FFFF
64K ROM Reserved
on System Board
10000:0000
FD000:FFFF
I/O Channel Expansion
Memory
Maximum Memory 15 Mb
FE000:0000
FE00:FFFF
64K ROM Reserved
on System Board
FF000:0000
FF000:FFFF
64K ROM Reserved
on System Board

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
16
IBM PC A T System I/O Allocation W orksheet
I/O Address IBM PC AT Assignments Y
our System
0000FF System Board I/O
100
110
120
130
140
150
160
170
180
190
1A0
1B0
1C0
1D0
1E0
1F0 Fixed Disk Control
200 Game I/O
210
220
230
240
250
260
270 278 - 27F: Parallel Printer Port 1
280
290
2A02B0
2C0
2D0
2E0
2F0 2F8 - 2FF: Serial Port 1
300
310
320
330
340
350
360
370 378 - 37F:Parallel Printer Port 1
380 SDLC, Bisynchronous 2
390
3A0
3B0 Monochrome
3C0
3D0 Color/Graphics Monitor Adapter
3E0
3F0 Diskette Controller & Serial Port 1

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
17
Timer Output
Keyboard (Output Buffer Full)
Interrupt from CTLR 2
Serial Port 2
Serial Port 1
Parallel Port 2
Diskette Controller
Parallel Port 1
Realtime Clock Interrupt
Reserved
Reserved
Reserved
Reserved
Coprocessor
Fixed Disk Controller
IRQ 0
IRQ 1
IRQ 2
IRQ 3
IRQ 4
IRQ 5
IRQ 6
IRQ 7
IRQ 8
IRQ 9
IRQ 10
IRQ 11
IRQ 12
IRQ 13
IRQ 14
IRQ 15
C
T
L
R
2
Shaded Interrupts are supported by the 1784KT
Interrupts IBM PC AT Assignments Your System
Hardware Interrupt Allocation W orksheet
IBM PC A T
Software Redirected to INT 0AH (IRQ2)

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
18
IBM PC XT System Memory Allocation W orksheet
Memory Address IBM PC XT Assignments Your System
0000:0000
3F00:0FFF
128256K Read/Write
Memory on System Board
4000:0000
9F00:0FFF
384K Read/Write Memory
Expansion in I/O Channel
A000:0000
A400:0000
A800:0000
AC00:0000
B000:0000 Monochrome
B400:0000
B800:0000 Color/Graphics
BC00:0000
C000:0000
C400:0000
C800:0000 Fixed Disk Control
CC00:0000
D000:0000
D400:0000
D800:0000
E000:0000
E400:0000
E800:0000
EC00:0000
F000:0000
FF00:0FFF
64K Base System ROM
BIOS and BASIC

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
19
IBM PC XT System I/O Allocation W orksheet
I/O Address IBM PC XT Assignments Your System
0000FF System Board I/O
1001FF Reserved
200 Game I/O
210 Expansion Unit
220
230
240
250
260
270
280
290
2A0
2B0
2C0
2D0
2E0
2F0 2F8 - 2FF: Async Com (2)
300
310
320 Fixed Disk
330
340
350
360
370 378 - 37F: Printer
380 SDLC or Bisynchronous Com 2
390
3A0 Bisynchronous Com 1
3B0 Monochrome Display/Printer
3C0
3D0 Color Graphics
3E0
3F0 Diskette/Async Com (1)

Communication Interface Module
Cat. No. 1784KT/B
Installation Data
20
Hardware Interrupt Allocation W orksheet
IBM PC XT
Interrupts IBM PC XT Assignments Y our System
Shaded Interrupts are supported by the 1784KT
IRQ 7
IRQ 0
IRQ 1
IRQ 2
IRQ 3
IRQ 4
IRQ 5
IRQ 6
Timer
Keyboard
COM2
COM1
Hard Disk
Floppy Disk
Printer