Allen-Bradley Direct Communication Module Installation Instructions

Installation Instructions
Direct Communication Module
(Catalog Number 1747-DCM)
Inside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page
For More Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hazardous Location Considerations . . . . . . . . . . . . . . . . . . . 4
Environments dangereux . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Module Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
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Direct Communication Module
Important User Information
Because of the variety of uses for the products described in this publication, those responsible for the
application and use of these products 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. In no event will Rockwell Automation be responsible or liable for
indirect or consequential damage resulting from the use or application of these products.
Any illustrations, charts, sample programs, and layout examples shown in this publication are intended solely
for purposes of example. Since there are many variables and requirements associated with any particular
installation, Rockwell Automation 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 Rockwell Automation office), describes some important
differences between solid-state equipment and electromechanical devices that 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 part, without written permission of
Rockwell Automation, is prohibited.
Throughout this publication, notes may be used to make you aware of safety considerations. The following
annotations and their accompanying statements help you to identify a potential hazard, avoid a potential
hazard, and recognize the consequences of a potential hazard:
WARNING
!
Identifies information about practices or circumstances that can cause an explosion in a
hazardous environment, which may lead to personal injury or death, property damage,
or economic loss.
ATTENTION
!
IMPORTANT
Identifies information about practices or circumstances that can lead to personal injury
or death, property damage, or economic loss.
Identifies information that is critical for successful application and understanding of the
product.
Publication 1747-IN005B-EN-P - March 2003
Direct Communication Module
3
For More Information
For detailed information on planning and installing your system, see the following
publications:
Publication
Number
Direct Communication User Manual
1747-6.8
SLC 500 Modular Hardware Style User Manual
1747-UM011
SLC 500 Fixed Hardware Style User Manual
1747-6.21
RIO Scanner User Manual
1747-6.6
SLC 500 Instruction Set Reference Manual
1747-RM001
Industrial Automation Wiring and Grounding Guidelines
1770-4.1
If you would like a manual, you can:
• download a free electronic version from the internet at
www.theautomationbookstore.com
• purchase a printed manual by:
– contacting your local distributor or Rockwell Automation representative
– visiting www.theautomationbookstore.com
– calling 1.800.963.9548 (USA/Canada) or 001.330.725.1574
(Outside USA/Canada)
Publication 1747-IN005B-EN-P - March 2003
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Direct Communication Module
Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D, or
non-hazardous locations only. The following WARNING applies to use in hazardous
locations.
WARNING
!
EXPLOSION HAZARD
• Substitution of components may impair suitability for
Class I, Division 2.
• Do not replace components or disconnect equipment
unless power has been switched off.
• Do not connect or disconnect components unless power
has been switched off.
• All wiring must comply with N.E.C. article 501-4(b).
Environments dangereux
Cet équipement est conçu pour être utilisé dans des environnements de Classe 1,
Division 2, Groupes A, B, C, D ou non dangereux. La mise en garde suivante
s’applique à une utilisation dans des environnements dangereux.
AVERTISSEMENT
!
DANGER D’EXPLOSION
• La substitution de composants peut rendre cet équipement
impropre à une utilisation en environnement de Classe 1,
Division 2.
• Ne pas remplacer de composants ou déconnecter
l’équipement sans s’être assuré que l’alimentation est
coupée.
• Ne pas connecter ou déconnecter des composants sans
s’être assuré que l’alimentation est coupée.
Publication 1747-IN005B-EN-P - March 2003
Direct Communication Module
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System Overview
The Direct Communication Module, catalog number 1747-DCM, connects any
SLC 500  programmable controller with expansion chassis or SLC 500 Modular
Programmable Controller to a supervisory Allen-Bradley programmable controller
via the RIO Link, providing a distributed processing system. The 1747-DCM allows
these supervisory processors to transfer data between one another. The 1747-DCM
appears as an RIO adapter to:
• a PLC processor with integral RIO scanner on the RIO Communication Link
• an RIO scanner, catalog number 1771-SN or 1747-SN, on the RIO
Communication Link
The 1747-DCM can physically reside on the RIO Link with any other adapter. It is
compatible with all RIO scanners.
1747-DCM Modules are connected in a daisy-chain configuration using
Belden™ 9463 cable. See the example below.
DCM 1
Supervisory PLC or SLC
RIO Scanner
PanelView™ (adapter)
Distributed SLCs with
DCMs (adapters)
DCM 2
DCM 3
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Direct Communication Module
Extended Node Capability
The 1747-DCM features extended node capability. Extended node capability allows
you to have up to 32 adapters on the RIO link using an 82Ω termination resistor at
both ends of the RIO link for all baud rates.
IMPORTANT
Extended node capability can only be used if the scanner and all
adapters on the RIO link have extended node capability.
Hardware Features
Self-Locking Tab
Side Label
DIP Switches
FAULT LED (Red)
DCM
SW1
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
(MSB)
X
X
RACK
SIZE
LAST RACK
CLR ON FLT
SW 1
I/O
GROUP
(LSB)
RACK
ADDR
SW2
DATA
RATE
(MSB)
8
7
6
5
4
3
2
1
O
N
RIO Link Connector
SW2
DATA RATE (K B/S)
57.6 115.2 230.4
(LSB)
RACK
ADDRESS
O
N
FIRST I/O GROUP
0
2
4
6
I/O
GROUP
1 2 3 4 5 6 7 8
Front Label
RACK SIZE
1/4 1/2 3/4 1
1 2 3 4 5 6 7 8
CONFIGURATION
RACK ADDR
Door Label
SLC 500
DIRECT COMMUNICATION
SW1
COMM LED (Green)
CAT MODULE
SERIAL NO.
FAULT
COMM
SW 2
LINE 1 _______
X
X
RACK
SIZE
SHIELD ______
LINE 2 _______
LAST RACK
CLR ON FLT
MADE IN USA
Cable Tie Slots
1747±DCM
Self-Locking Tab
Publication 1747-IN005B-EN-P - March 2003
DATA
RATE
8
7
6
5
4
3
2
1
Direct Communication Module
7
Module Configuration
DIP Switches
Starting I/O Group Number
O
N
Chassis Address
1 2 3 4 5 6 7 8
DIP switches enable the 1747-DCM to properly interpret the RIO system addressing.
The 1747-DCM has two banks of DIP switches mounted on its circuit board. Each
bank contains eight switches. The default settings are shown below.
DIP Switch 1 Settings
Chassis Address (SW1-1 through SW1-6)
The chassis address refers to the logical chassis number from the scanner image
that contains a particular 1747-DCM’s image.
The table on the following page shows the settings that define possible chassis
address choices for all scanners. To use this table, first determine which of the
following categories applies to your scanner.
• PLC-2, mini-PLCs, PLC-2/30 with 1770-SD, SD2 remote scanner
• PLC-3 and PLC-5/250 processors (This category includes those with built-in
scanners, as well as the following, without built-in scanners: 1775-54A, -54B,
-S5, SR, -SR5, and 5250-RS.)
• SLC-5/02 (or above) with 1747-SN scanner
After determining which category applies to your 1747-DCM application:
1. Find the column for the scanner used in your application.
2. Go down the column to the chassis address that you assigned to the
1747-DCM.
3. Use the switch settings in the right-most columns of the table that
correspond to your chassis address.
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Direct Communication Module
Settings for SW1-1 through SW1-6
Logical Chassis Number (Octal)
Switch Number (SW1)
1747- PLC-2 PLC-3 PLC-5 PLC-5 PLC-5 PLC-5 PLC-5 1
SN
/15
/25
/40
/60
/250
2
3
4
5
6
0
1
0
-
-
-
-
0
ON
1
2
1
1
1
1
1
1
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
2
3
2
2
2
2
2
2
OFF
ON
ON
ON
ON
OFF
3
4
3
3
3
3
3
ON
3
ON
ON
ON
ON
OFF
5
4
4
4
OFF
4
4
ON
ON
ON
OFF
ON
ON
6
5
5
7
6
6
5
5
5
ON
ON
ON
OFF
ON
OFF
6
6
6
ON
ON
ON
OFF
OFF
7
7
ON
7
7
7
ON
ON
ON
OFF
OFF
OFF
10
10
10
10
ON
ON
OFF
ON
ON
ON
11
11
11
11
ON
ON
OFF
ON
ON
OFF
12
12
12
12
ON
ON
OFF
ON
OFF
ON
13
13
13
13
ON
ON
OFF
ON
OFF
OFF
14
14
14
14
ON
ON
OFF
OFF
ON
ON
15
15
15
15
ON
ON
OFF
OFF
ON
OFF
16
16
16
16
ON
ON
OFF
OFF
OFF
ON
17
17
17
17
ON
ON
OFF
OFF
OFF
OFF
20
20
ON
OFF
ON
ON
ON
ON
20
21
21
21
ON
OFF
ON
ON
ON
OFF
22
22
22
ON
OFF
ON
ON
OFF
ON
23
23
23
ON
OFF
ON
ON
OFF
OFF
24
24
24
ON
OFF
ON
OFF
ON
ON
25
25
25
ON
OFF
ON
OFF
ON
OFF
26
26
26
ON
OFF
ON
OFF
OFF
ON
27
27
30
27
ON
OFF
ON
OFF
OFF
OFF
30
ON
OFF
OFF
ON
ON
ON
31
31
ON
OFF
OFF
ON
ON
OFF
32
32
ON
OFF
OFF
ON
OFF
ON
33
33
ON
OFF
OFF
ON
OFF
OFF
34
34
ON
OFF
OFF
OFF
ON
ON
35
35
ON
OFF
OFF
OFF
ON
OFF
36
36
ON
OFF
OFF
OFF
OFF
ON
37
37
ON
OFF
OFF
OFF
OFF
OFF
40
OFF
ON
ON
ON
ON
ON
41
OFF
ON
ON
ON
ON
OFF
42
OFF
ON
ON
ON
OFF
ON
43
OFF
ON
ON
ON
OFF
OFF
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Direct Communication Module
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Settings for SW1-1 through SW1-6
Logical Chassis Number (Octal)
Switch Number (SW1)
1747- PLC-2 PLC-3 PLC-5 PLC-5 PLC-5 PLC-5 PLC-5 1
SN
/15
/25
/40
/60
/250
77
77
2
3
4
5
6
44
OFF
OFF
ON
OFF
ON
ON
45
OFF
ON
ON
OFF
ON
OFF
46
OFF
ON
ON
OFF
OFF
ON
47
OFF
ON
ON
OFF
OFF
OFF
50
OFF
ON
OFF
ON
ON
ON
51
OFF
ON
OFF
ON
ON
OFF
52
OFF
ON
OFF
ON
OFF
ON
53
OFF
ON
OFF
ON
OFF
OFF
54
OFF
ON
OFF
OFF
ON
ON
55
OFF
ON
OFF
OFF
ON
OFF
56
OFF
ON
OFF
OFF
OFF
ON
57
OFF
ON
OFF
OFF
OFF
OFF
60
OFF
OFF
ON
ON
ON
ON
61
OFF
OFF
ON
ON
ON
OFF
62
OFF
OFF
ON
ON
OFF
ON
63
OFF
OFF
ON
ON
OFF
OFF
64
OFF
OFF
ON
OFF
ON
ON
65
OFF
OFF
ON
OFF
ON
OFF
66
OFF
OFF
ON
OFF
OFF
ON
67
OFF
OFF
ON
OFF
OFF
OFF
70
OFF
OFF
OFF
ON
ON
ON
71
OFF
OFF
OFF
ON
ON
OFF
72
OFF
OFF
OFF
ON
OFF
ON
73
OFF
OFF
OFF
ON
OFF
OFF
74
OFF
OFF
OFF
OFF
ON
ON
75
OFF
OFF
OFF
OFF
ON
OFF
76
OFF
OFF
OFF
OFF
OFF
ON
77
77
77
77
77
77
Reserved
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Direct Communication Module
Starting I/O Group Number (SW1-7 and SW1-8)
The starting I/O group number must be an even number from 0 to 6 (e.g. 0, 2, 4, or
6) and is dependent upon whether the 1747-DCM has been configured as a full, ¾,
½, or ¼ chassis. The first word transferred is always the status word for the
1747-DCM.
The table below shows the switch settings for the starting I/O group numbers.
Starting I/O Group Number
SW1-7
SW1-8
Valid Chassis Configuration
0
ON
ON
All
2
ON
OFF
¾, ½, ¼
4
OFF
ON
½, ¼
6
OFF
OFF
¼
DIP Switch 2 Settings
Reserved
O
N
Rack Size
Last Rack
Clear On Fault
Data Rate
1 2 3 4 5 6 7 8
The default settings are shown below.
Data Rate (SW2-1 and SW2-2)
Data Rate
SW2-1
SW2-2
Cable Length (Belden 9463)
57.6K baud
ON
ON
3048 meters (10,000 feet)
115.2K baud
ON
OFF
1542 meters (5,000 feet)
230.4K baud
OFF
ON
762 meters (2,500 feet)
OFF
OFF
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Direct Communication Module
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Clear on Fault (SW2-3)
Clear On Fault
SW2-3
Yes
OFF
No
ON
Turn the switch to the OFF position if you want the 1747-DCM to clear and hold
clear all data bits in its input image table in the event of an RIO communication
failure or when the supervisory processor enters the Program/Test/Fault mode.
Status bits will not be cleared.
Turn the switch to the ON position if you want the 1747-DCM to hold all input data
bits in their last state if an RIO communication failure occurs or when the
supervisory processor enters the Program/Test/Fault mode.
ATTENTION
!
Before setting SW2-3 to ON, make sure that holding all 1747-DCM
input bits in their last state, in the event of an RIO communication
failure, does not create an unsafe condition in the distributed SLC
processor.
Last Chassis (SW2-4)
Switch SW2-4 must be set to the OFF position if the 1747-DCM shares its logical
chassis with at least one other adapter and has been assigned the highest I/O group
number in that logical chassis.
Last Chassis
SW2-4
Yes
OFF
No
ON
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Direct Communication Module
Chassis Size (SW2-5 and SW2-6)
The logical chassis size allocates image space in the scanner for each 1747-DCMs
I/O data. The 1747-DCM allows ¼, ½, ¾, and full chassis addressing. SW2 switches
5 and 6 define the chassis size, as shown below.
Chassis Size
SW2-5
SW2-6
Number of RIO Words Transferred
Total Words
¼ Logical Chassis
ON
ON
1 Status and 1 Data
2
½ Logical Chassis
ON
OFF
1 Status and 3 Data
4
¾ Logical Chassis
OFF
ON
1 Status and 5 Data
6
Full Logical Chassis
OFF
OFF
1 Status and 7 Data
8
IMPORTANT
The 1747-DCM image cannot cross logical chassis boundaries. For
example, configuring the module for ½ logical chassis with
starting group 6 will cause a configuration error.
Installation and Removal
ATTENTION
Disconnect power before attempting to install, remove, or wire
the 1747-DCM.
!
IMPORTANT
Make sure you have set the DIP switches properly before
installing the 1747-DCM. See Module Configuration on page 7.
Power Requirements
Before installation, make sure your modular SLC power supply has adequate
reserve current capacity. The 1747-DCM requires 360 mA at 5V dc.
Each fixed SLC 500 controller can support one 1747-DCM in a 2-slot expansion
chassis, depending on which I/O module is in the second slot. See Discrete Input
and Output Modules Technical Data, publication number 1746-2.35 for details.
Publication 1747-IN005B-EN-P - March 2003
Direct Communication Module
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Installation
1. Disconnect power.
2. Align the full-sized circuit board with the chassis card guides. The 1747-DCM
must not be installed in slot 0. The first slot (slot 0) of the first chassis is
reserved for the CPU.
3. Slide the module into the chassis until the top and bottom latches are
latched.
4. Attach the RIO link cable to the connector on the front of the module.
5. Insert the cable tie in the slots.
6. Route the cable down and away from the module, securing it with a cable
tie.
7. Cover all unused slots with the Card Slot Filler, catalog number 1746-N2.
Module Release
Card Guide
RIO Link Connector
Removal
1. Disconnect power.
2. Press the releases at the top and bottom of the module and slide the module
out of the chassis slot.
3. Cover all unused slots with the Card Slot Filler, catalog number 1746-N2.
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Direct Communication Module
Network Wiring
A ½ Watt terminating resistor must be attached across line 1 and line 2 of the
connectors at each end (scanner and last physical device) of the network. The size
of the resistor depends upon the baud rate and extended node capability, as shown
in the table below.
Baud Rate
Using Extended
Node Capability
Without Extended
Node Capability
Terminating Resistor Size
Maximum Cable
Distance (Belden 9463)
57.6K baud
82Ω ½ Watt Grey-Red-Black-Gold
3048 m (10,000 ft.)
115.2K baud
82Ω ½ Watt Grey-Red-Black-Gold
1524 m (5,000 ft.)
230.4K baud
82Ω ½ Watt Grey-Red-Black-Gold
762 m (2,500 ft.)
57.6K baud
150Ω ½ Watt
3048 m (10,000 ft.)
115.2K baud
150Ω ½ Watt Brown-Green-Brown-Gold
1524 m (5,000 ft.)
230.4K baud
82Ω ½ Watt Grey-Red-Black-Gold
762 m (2,500 ft.)
Terminating Resistor
DCM
FAULT
RIO Scanner
SW1
RACK ADDR
RACK SIZE
1/4 1/2 3/4 1
Line 1 - Blue
Shield - Shield
Line 2 - Clear
RACK
ADDRESS
(MSB)
SW2
1 2 3 4 5 6 7 8
DATA RATE (K B/S)
57.6 115.2 230.4
(LSB)
X
X
RACK
SIZE
LAST RACK
CLR ON FLT
DATA
RATE
O
N
RIO Link
Connector
I/O
GROUP
O
N
FIRST I/O GROUP
0
2
4
6
1 2 3 4 5 6 7 8
COMM
CONFIGURATION
LINE 1 _______
SHIELD ______
LINE 2 _______
1747±DCM
1747-DCM
Direct Communication
Module
1747-DCM
Direct Communication
Module
Line 1 - Blue
Shield - Shield
Line 2 - Clear
Line 1 - Blue
Shield - Shield
Line 2 - Clear
Terminating Resistor
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Direct Communication Module
15
Troubleshooting
Using the FAULT LED (Red)
If LED is:
Cause:
Corrective Action:
On
Internal Fault
Cycle power to the I/O chassis containing the 1747-DCM. Replace the
1747-DCM if red LED remains lit after power-up.
Flashing
Configuration
Error
Check that the DIP switch settings are correct. Make sure that I/O group
Normal State
No action required.
Off
(1)
and chassis size settings are compatible.(1) Also see that the setting for
chassis address is correct.
The 1747-DCM cannot cross logical chassis boundaries. For example, configuring the module for ½ logical chassis with
starting group 6 causes a configuration error.
Using the COMM LED (Green)
If LED is: Cause:
Corrective Action:
On
Normal State
No action required.
Flashing
RIO scanner’s processor in
Program/Test/Fault mode
Check for RIO scanner’s processor error, correct
condition, and cycle power to the 1747-DCM.
RIO scanner’s processor not connected to
scanner
Check that the scanner is properly installed in the
chassis.
RIO scanner’s processor chassis inhibited
Check RIO scanner’s processor chassis integrity,
correct any problem, and cycle power to the
1747-DCM.
Check that the baud rate of the 1747-DCM matches
the baud rate of the scanner.
Off
No communication between RIO
scanner’s processor and 1747-DCM
Check cable connections from the RIO scanner or its
processor to the 1747-DCM.
Check that the 1747-DCM connector is properly
installed.
Publication 1747-IN005B-EN-P - March 2003
Specifications
Backplane Current Consumption
360 mA at 5V dc
Operating Temperature
0°C to +60°C (+32°F to +140°F)
Storage Temperature
-40°C to +85°C (-40°F to +185°F)
Humidity Rating
5% to 95% non-condensing
Agency Certification (when product or packaging
is marked)
UL listed
CSA certified
Class 1, Division 2, Groups A, B, C, D certified
CE compliant for all applicable directives.
C-Tick marked for all applicable acts.
Publication 1747-IN005B-EN-P - March 2003
Supersedes Publication 1747-IN005A-EN-P - February 2000
PN 40071-083-01(2)
Copyright © 2007 Rockwell Automation, Inc. All rights reserved. Printed in Singapore.
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