Allen-Bradley 1791-IOVA, -IOVB User Manual

Be
ALLEN-BRADLEY
Block 10
Cat. No. 1791-10VA and _IOVB
User Manual
—
Important User Information
Because of the variety of uses for the 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 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.
Throughout this manual we make notes to alert you to possible injury to
people or damage to equipment under specific circumstances.
WARNING: Tells readers where people may be hurt if
procedures are not followed properly.
CAUTION: Tells readers where machinery may be damaged or
economic loss can occur if procedures are not followed
properly.
Warnings and Cautions:
Identify a possible trouble spot.
Tell what causes the trouble.
Give the result of improper action.
Tell the reader how to avoid trouble.
Important: We recommend you frequently backup your application
programs on appropriate storage medium to avoid possible data loss.
Using This Manual
Introducing Block 1/0
Installing Block I/O
Configuring Your Block I/O
for PLC Family
Programmable Controllers
Configuring Your Block I/O
for SLC Controllers
Troubleshooting
Specifications
Table of Contents
Preface
Purpose of Manual ..........roreocococscsooocercosoceroreo, P-1
Audience ........eoooreesecocccorceresoraraacacacroc cacon. P-1
Vocabulary ...........e_ceooesrevrcccocroosconooooccaconnan P-1
Manual Organization .......0.0000000000000000000000000 0000000 P-1
About Block I/O ............eereoeerccsococccrsococrecoeeneso P-2
Related Publications ....0.00000000000000000000000 00000000000 P-2
Chapter 1
Chapter ObjectiveS ......00000000000000004000000000000000008 1-1
General Description ...00000000000000004004000.040.00080000000 1-1
How Block I/O Fits in a PLC System ........... 1-2
Chapter 2
Chapter Objectives ............00000000 0000000000 0000000000 2-1
Pre-installation ConsiderationsS ......0.00.00000000000000 000000000 2-1
Installing the Block 1/0 ...........r_receecsocaconococacecacen ao 2-3
Connecting Wiring ..........oereoecrcsocorercccconocccenaro 2-3
Remote I/O Link or Distributed /O Link Wiring ................. 2-7
Extended Node Capability ...............0200000 000000000000 2-9
Compatibility of 1771 I/O Products with Extended Node Numbers .. 2-10
Chapter 3
Chapter Objectives ...........eoeorecccrocosocooracronaceo. 3-1
Setting the Configuration Switches .............eeeeeeesdeccccoo 3-1
Chapter 4 |
Chapter Objectives .....0.00000000000000400000000000000000000 4-1
Setting the Configuration Switches ........e..c.oeee0ecoc0ecccccoco 4-1
Addressing the Blocks Using SLC Controllers .........er_r.coccoom. 4-3
Chapter 5
Chapter Objectives ........e.ooccococcocccosaroecacareroare, 5-1
LED Indicators ...........000000000 000000010000 0000000000 0 5-1
Appendix A
Specifications ...........oe_eceeoorcocosreccracorecoo eee... A-1
Purpose of Manual
Audience
Vocabulary
Manual Organization
Preface
Using This Manual
This manual shows you how to use your 1791-IOVA and -IOVB block 1/0
with an Allen-Bradley programmable controller. It helps you install,
program and troubleshoot your module.
You must be able to program and operate an Allen-Bradley programmable
controller (PLC) to make efficient use of block 1/0 modules.
We assume that you know how to do this in this manual. If you do not,
refer to the appropriate PLC programming and operations manual before
you attempt to program this module.
In this manual, we refer to:
= the block I/O module as the “block” or the “module”
« the programmable controller as the “controller”
This manual is divided into 5 chapters. The following chart shows each
chapter with its corresponding title and brief overview of the topics
covered in that chapter.
1 Introducing Block O hardware features
; Module power requirements, location, and wiring
2 Installing Block 1/0 information
3 Configuring Your Block I/O for PLC How to set the configuration switches and address
Family Programmable Controllers the block 1/0.
4 Confiquring Your Block 1/0 for SLC How to set the switches, and where to go for full
Controllers information
, How to use the indicators to troubleshoot your block
5 Troubleshooting /O module.
Appendix A | Specifications Specifications for the block I/O.
Preface
Using This Manual
About Block 1/0
Related Publications
Block I/O consists of small, self-contained remote I/O devices complete
with power supply, programmable controller interface, input/output
connections and signal conditioning circuitry.
This publication covers the 1791-IOVA and -IOVB block I/O modules.
The 1791-IOVA has 8 inputs and 8 outputs; the 1791-IOVB has 10 inputs
and 6 outputs. In all other respects, they are identical.
For a list of publications with information on Allen-Bradley
programmable controller products, consult our publication index (SD499).
Chapter
Chapter Objectives
General Description
Introducing Block 1/0
In this chapter you will learn what block 1/0 is, its features, and how it
functions.
1791-IOVA and —-IOVB block I/O modules are small, self—contained
remote I/O devices complete with power supply, programmable controller
interface, input/output connections and signal conditioning circuitry.
The 1791-IOVA has 8 inputs and 8 outputs; the 1791-I0VB has 10 inputs
and 6 outputs. In all other aspects, they are identical.
The blocks are compatible with PLC-29, PLC-39, and PLC-5® family
programmable controllers, and the SLC® 500 modular controllers. Refer to
the table below for information on using block I/O with various
Allen-Bradley programmable controllers.
DH-485 Port
N
1771-SN sub-1/O scanner or
1771-SD2 remote I/O scanner
PLC-2 family programmable controller
PLC-3 family programmable controller
Block attaches directly to controller
PLC-5 family programmable controller
1747-DSN scanner or
SLC 500 programmable controller 1747-SN remote I/O scanner
Figure 1.1 shows the physical features of the block I/O.
Figure 1.1
Major Features of the Block 1/0 Module (1791-I0VA shown)
Switch Assemblies Status Indicators Communication LED Power LED
7 _— N\ NX
= HEE ox 00060008 M Le О
LI 000000 o O
es nur OE
Ol _ [000000000] | O00000O0OO0CO0000000
lO
Нее Ию
/ /
Removable Remote I/O Link Connector Removable Input/Output Connector 10825-1
1-1
Chapter 1
Introducing Block 1/0
Wiring Connectors — Remote I/O link connector and input/output
connector are removable for easy connection of wiring. Each connector is
secured in place with 2 screws.
Switch Assemblies — Two multiple position switches are provided for
setting the I/O rack number, starting I/O group, transmission rate, last
chassis, last state and DH—485 terminator.
Status Indicators — LED indicators display the status of communication,
power and input/output. These provide a visual indication for aid in
troubleshooting.
DH-485 Port — A plug-in DH-485 data port is provided for use with the
SLC controller.
How Block O Fits in a PLC Block I/O is a complete I/O interface that includes the functionality of the
System I/O rack, adapter, power supply, and I/O modules in a single unit. Connect
sensors and actuators to the module and use the remote 1/O cable to
connect the block 1/0 to your programmable controller as shown in
chapter 2.
The 1791-IOVA and —IOVB blocks use sourcing inputs and sinking
outputs.
In sourcing input modules (Figure 1.2), the +V on dc circuits is bussed on
the module supplying (sourcing) the current for each input circuit. The
field device switches the circuit to the common (side of the power supply,
sinking the circuit and causing current to flow from the module’s input
Figure 1.2
Sourcing Input Example
Block 1/0
| +V
DC Power
Supply
-\/
N AAM
ft
Se] Field ЛД
Device
Input
dc Common Bus
10917-1
Chapter 1
Introducing Block 1/0
In sinking outputs (Figure 1.3), the current flow is reversed. The dc
common is bussed on the module and the current is sourced from the field
device being actuated. When an output is turned on, the output switch in
the module sinks the circuit, causing current to flow from the +V bus
through the field device to the module.
Figure 1.3
Sinking Output Example
Block 1/0 +V
Field
A] Device Bus
«ни
Field
Le Device
DC Power
Supply
GND
1 Common | -V
e
a 10918-1
You connect the block I/O to your remote I/O link as you would any other
device (Figure 1.4). The block looks like a 1/4 1/O rack to the processor,
and uses 2 words of input image table memory and 2 words of output
image table memory. The block is addressed directly on the remote 1/0
link.
Block I/O functions exactly like any Allen-Bradley remote I/O product.
Input and output data is scanned asynchronously and transferred back and
forth between the block and the controller input and output image table.
Figure 1.4
Block I/O Connection in a PLC System
Blocks are daisy-chained to
a programmable controller or
a scanner.
Programmable Controller
or Scanner.
Block 1/O - each block
is 1/4 1/0 rack.
Chapter Objectives
Pre-installation
Considerations
Chapter
Installing Block I/O
In this chapter you will learn how to mount the block, connect the remote
1/0 link, connect the input and output wiring to the block, and terminate
the remote I/O link.
Before installation, you must determine:
the number of blocks desired
the total distance of the installation
s transmission rate desired
Acceptable combinations are shown in Table 2.A.
Table 2.A
if external fuses are required
Acceptable Combinations of Processor and Block I/O
10,000 cable-feet
57.6K
1771-SN 16 blocks with 150 ohm terminator
115.2K 5,000 cable-feet
PLC-2 family
1772-SD. 1772-SD2 16 blocks/channel, 28 blocks/scanner 57.6K 10,000 cable-feet
with 150 ohm terminator 115.2K 5,000 cable-feet -
16 blocks/channel, 64 blocks/scanner 57.6К 10,000 cable-feet
Any PLC-3 scanner module with 150 ohm terminator
ohm fermina’o 115.2K 5,000 cable-feet
PLC-3 family 57.6K 10,000 cable-feet
32 blocks/channel, 64 blocks/scanner -
1775-95, or -SA5 module with 82 ohm terminator 115.2K 5,000 cable-feet
230.4K 2,000 cable-feet
PLC-5/15 12 blocks with 150 ohm terminator | 57.6K 10,000 cable-feet
16 blocks with 150 ohm terminator, _
PLC-5 family PLC-5/25 28 blocks with 82 ohm terminator 57.6К 10,000 cable-feet
PLC-5/30 16 blocks/channel, 28 blocks per |>°76K 10,000 cable-feet
processor with 150 ohm terminator — | 145» 5 000 cable-feet
Chapter 2
Installing Block 1/0
| 57.6K
_ | 28 blocks/channel, 28 blocks per т
PLC-5/30 processor with 82 ohm terminator 115.2K 5,000 cable-feet
230.4K: 2,500 cable-feet
116 blocks/channel, 32 blocks per 576K 10,000 cable-feet
processor with 150 ohm terminator — | 145» 5 000 cable-feet
PLC-5/40L, PLC-5/60L 57.6K 10,000 cable-feet
32 blocks/channel, 60 blocks per ~
processor with 82 ohm terminator 115.2K 5,000 cable-feet
230.4K 2,500 cable-feet
16 blocks/channel, 60 blocks per 57.6K 10,000 cable-feet
processor with 150 ohm terminator — | 145 > 5.000 cable-feet
PLC-5 family (continued) | PLC-5/40, PLC-5/60 57.6K 10,000 cable-feet
32 blocks/channel, 60 blocks per ~
processor with 82 ohm terminator 152K 5,000 cable-feet
230.4K 2,500 cable-feet
16 blocks/channel, 32 57.6K 10,000 cable-feet
blocks/scanner, 64 blocks/(2
scanners) with 150 ohm terminator — | 115.2K 5,000 cable-feet
PLC-5250 - requires
57.6K 10,000 cable-feet
a 5150-RS remote scanner 32 blocks/channel, 32
blocks/scanner, 64 blocks/(2 115.2K 5,000 cable-feet
scanners) with 82 ohm terminator
230.4K 2,500 cable-feet
SLC-5/01 Controller ‘1 1747-DSN Scanner module* | 7 blocks 230.4K 2,500 cable-feet
SLC-5/02 Controller 1747-DSN Scanner module* | 30 blocks 230.4K 2,500 cable-feet
57.6K 10,000 cable-feet
1747-SN Remote 1/0
SLC-5/02 Controller Scanner Module* 16 blocks 115.2K 5,000 cable-feet
230.4K 2,500 cable-feet
* The DH-485 network, which operates independent of the remote 1/O/distributed 1/0 network, supports up to 30 DH-485 nodes (blocks or 1747-AIC isolated couplers). The
maximum DH-485 network distance is 4,000 cable-feet.
Chapter 2
Installing Block 1/0
Installing the Block I/O Figure 2.1 shows the mounting dimensions for the block I/O module.
| | Mount the blocks horizontally with a minimum of 2” between blocks. This
air gap is necessary to maintain proper cooling air flow through the block.
Figure 2.1
Mounting Dimensions for the Block VO Module (Cat. No. 1791-I0VA
and -IOVB)
smm Depth = 96.0mm (3.78)
0.31” | | 198mm
7.8
orur0 0 0 00000 COMM POWER
sur0 00000600 оо
pg . 00
о И ее | [TITI TITI OI
o Tm
212mm
8.35” 10829-1
The operating temperature in the air gap between block I/O modules must
not exceed 55°C (151%). Figure 2.2 shows the dimensions of the required
air gap.
Figure 2.2
Clearance Required for Block 1/0 Modules
pUrPuTO 0 0 0 00 00 ,
| NO 0000000 0 00 0 '
-— —;
‚ 31mm || [00000000 __[0000000000000000000 sim
ЭН Те '
fr
et a
Connecting Wiring Connections to the block I/O module are made to the removable
connectors which plug into the front of the block. The connector blocks are
keyed to prevent incorrect insertion and are secured by screws.
Wiring for the block is shown in Figure 2.3 and Figure 2.4. Remote МО
wiring connections are shown in Figure 2.5.
2-3
Chapter 2
Installing Block 1/0
2 SHD 1 B A COM +24 DCN CG
OOO PDDD OD
Figure 2.3
Input and Output Connections for the 1791-10VA
8 OUTPUTS 8 INPUTS
COM O0 O1 0203 04 Os © O7 0 11 12 13 14 15 16 17 VDC
DDDODDDDDDODDDDODDO®
1 I ]
Remote DH-485
IO Link — (for SLC
(see Figure 2.5) only) Input +VDC
+24V de
de Neutral Output Common
Chassis Ground
OUTPUT 0—— — INPUT 7
OUTPUT 1 INPUT 6
OUTPUT 2 INPUT 5
OUTPUT 3 INPUT 4
OUTPUT 4 INPUT 3
OUTPUT 5 INPUT 2
OUTPUT 6- INPUT 1
OUTPUT 7 INPUT O
10831-!
Figure 2.4 |
Input/Output Wiring Connections for the 1791-10VB
6 OUTPUTS 10 INPUTS
2 SHD1 B ACOM +24 DCNCG COMOO 01 0203 0405 0 HH 12 KB 14 15 16 17 18 19 VDC
002000 DD ®
C—I1T t—}
Remote DH-485
YO Link (for SLC only)
(see Figure 2.5 ‚24V de
de Neutral
Chassis Ground
24
XXXL XXXIX XR) XT XT ROTOJO TO,
input +VDC
INPUT 9
INPUT 8
as INPUT 7
Output Common INPUT 6
INPUT 5
OUTPUT 0
INPUT 4
OUTPUT 1
INPUT 3
OUTPUT 2
OUTPUT 3 INPUT 2
OUTPUT 4 INPUT 1
OUTPUT 5 INPUT 0
12268-1
Chapter 2
Installing Block 1/0
Table 2.B
Wiring Block Designations
Blue wire - RIO
Clear wire - RIO
Shield - RIO
DH-485 À
DH-485 B
DH-485 Common
+24V de
de neutral
Blue wire - RIO
Clear wire - RIO
Shield - RIO
DH-485 A
DH-485 B
DH-485 Common
+24V de
de neutral
Chassis ground
Remote 1/0 Connector | 1
2
SHD
À
B
COM
+24
DCN
CG
COM
00 thru 07
10 thru 17
VDC
Chassis ground
HO Connector COM
O0 thru 05
10 thru 19
vDC
Output common
Output 0 thru 7
input 0 thru 7
Input VDC
Output common
Output 0 thru 5
Input 0 thru 9
Input VDC
Power Supply Requirements
An external 24V dc power supply is required to power the block. Total
current required to power the block is equal to 200mA plus an inrush of
5.5A for 10usec for each block. The supply must be able to source an
additional 100mA plus an inrush current of 400mA when a peripheral is
connected.
In addition, the external power supply should have current limiting
capabilities. The voltage range must not exceed 20.5-27.6V dc.
2-5
Chapter 2
Installing Block I/O
Wiring Requirements
Table 2.C shows the wiring cable requirements for the 1791-I0VA and
1791-I0VB modules.
Table 2.C |
Acceptable Wiring Cables for Block I/O Connection
PLC-2, PLC-3, PLC-5 family programmable
Remote I/O Link or DIO Link | Belden 9463 controllers and SLC controllers
DH-485 Data Link Belden 9842 SLC controllers only
Up to 14AWG
Input and Output wiring Stranded with 3/64 All
inch insulation
Figure 2.5
Remote 1/0 Link Wiring
Tighten screw to clamp wire.
Connection | 1 | 2 | SHD]
Clear wire X
Blue wire |X
Shield wire X
10832-1
2-6
Remote I/O Link or
Distributed I/O Link Wiring
To Programmable Controller
or 1/O Scanner Module
Chapter 2
Installing Block 1/0
Blocks must be wired in series as shown in Figure 2.6 or Figure 2.7. Do
not attempt to wire any block in parallel.
The number of blocks used depenás not only on the user requirements but
also on the system used. Refer to Table 2.A (page 2-1) for maximum
block usage for individual systems.
Figure 2.6
Series Connection for Block VO Using PLC-2, PLC-3 or PLC-5 Family
Programmable Controllers |
(0
||
||
U
ly
Re = 11/0 Rack
== <=, = =
NN SZ
= Sey —
EJ
Install terminating resistor on last block.
2-7
Chapter 2
Installing Block I/O
Figure 2.7
Series Configurations for Block l/O Using the SLC Programmable
Controller
To 1747-DSN
q
To 1747-DSN
Scanner Module
SF Pore"
Install terminating resistor
on last block.
= I =...
2
29
30
To 1747-SN | Up to 30 blocks with
Scanner Module | SLC-5/02
Install terminating resistor |
on last block.
1
2
15
16
inati ; Up to 16 blocks with
Install terminating resistor
on last block. SLC-5/02
10834-1
Extended Node Capability
wires and termination resistor.
Chapter 2
Installing Block 1/0
Termination Resistor
A termination resistor must be installed on the last block in a series.
Connect the resistor as shown in Figure 2.8. Use the resistor as identified
in Table 2.D.
Figure 2.8
Installing the Termination Resistor
Tighten screw to clamp
Connect termination
resistor across terminals 1
and 2
Table 2.D
Terminator Requirements
“PLC-2, PLC-3, PLC-5 family,
150 ohm - 57.6K and 115.2K baud
SLC 500 family 82 ohm - 230.4K baud
If this is the last remote I/O adapter on the remote 1/0 link in a PLC
system, you must use a terminating resistor to terminate both ends of the
remote 1/O link (scanner end and last block end). The size of the terminator
is determined by the system configuration.
Older configurations can use a 150 ohm resistor at both ends. With newer
devices that can support it, you can use an 82 ohm termination resistor at
both ends. The 82 ohm terminators provide “extended node” capability
which allows you to have up to 32 physical devices on the remote I/O link.
(The number of logical racks capable of being addressed by the scanner is
not affected.)
CAUTION: Devices that are operating at 230.4K baud must
have 82 ohm terminators in place for proper operation.
Chapter 2
Installing Biock 1/0
Compatibility of 1771 1/0 Certain products are not compatible with extended node capabilities
Products with Extended obtained with the use of 82 ohm terminators. Table 2.E lists those products
Node Numbers that are not compatible.
Table 2.E
Non-compatible Products When Using Extended Node Capabilities
| Scanners - 1771-SN All
1772-SD All
1772-SD2 All
1775-SR All
1775-S4A All
| 1775-S4B All
Adapters - 1771-AS All
1771-ASB Series A
1771-DCM All
Miscellaneous - 1771-AF All
1771-AF1 All
2-10
Chapter
Configuring Your Block I/O for PLC
Family Programmable Controllers
Chapter Objectives In this chapter you will leam how to configure your block I/O when used
with PLC family programmable controllers. This includes the following:
s setting the configuration switches
= addressing the block I/O
Setting the Configuration Each block I/O module has two 6—position DIP switches for setting:
Switches = starting I/O group
= J/O rack number
= transmission (baud) rate
= last chassis
= last state
= DH-485 terminator
These switches are accessible by opening the door on the left side of the
module (Figure 3.1).
3-1
Chapter 3
Configuring Your Block 1/O for PLC
Family Programmable Controllers
Figure 3.1 |
Switch Settings for 1791-IOVA and -IOVB
sis
cri
cg ourur_U C O0 000 COMM POWER 0
\ wuT0 00000600 O о
\
o | O000 OO0O000000000000
o | 1919] NUY | ||| ©
Baud Rate 5 6 |
Si S$? 2304K | On (Closed) Off (Open) |
= | 115.2K Off (Open) | On =
10 Rack Number = | oem 576K] on (Closed On (Closed
Switches 3-6 + = = |
(see Table 3.A, B and C} ce <LI | | Last State | 4 |
Е CIS ¡CIL
sic) || | Reset to 0 | Of (Open) |
Starting Switch -CC3 | |- CI] | Hold last state! On (Closed)
I/O Group 1 9 || м |
0 | On (Closed)| On (Closed) Used Last Chassis | 3 |
>| Off (Open) | On (Closed) | Yes | Off (Open) |
4 | On (Closed)| Off (Open) Switch as viewed from this end. | No | On (Closed)|
6 Off (Open) | Off (Open) |
Off = Open ad nas | + |
Terminate | Off (Open) |
On = Closed me None |On(Closed)| pe,
Table 3.A
Addressing PL.C-2 Family Processors
Le
On (Closed)
On (Closed)
“on (Closed)
On (Closed)
Off (Open)
On (Closed)
On (Closed)
On (Closed)
On (Closed)
Off (Open)
On (Closed)
On (Closed)
Off (Open)
Off (Open)
On (Closed)
On (Closed)
On (Closed)
On (Closed)
Off (Open)
On (Closed)
Off (Open)
On (Closed)
Off (Open)
On (Closed)
On (Closed)
Off (Open)
Off (Open)
On (Closed)
Table 3.B
Addressing PLC-3 and PLC-5/250 Processors
Chapter 3
Configuring Your Block I/O for PLC
Family Programmable Controllers
0 On (Closed) | On (Closed) | On (Closed) | On (Closed) 10 On (Closed) | On (Closed) | On (Closed) | Off (Open)
1 Off (Open) | On (Closed) | On (Closed) | On (Closed) 11 Off (Open) | On (Closed) | On (Closed) | Off (Open)
2 On (Closed) | Off (Open} | On (Closed) | On (Closed) | 12 On (Closed) | Off (Open) | On (Closed) | Off (Open)
3 Off (Open) | Off (Open) | On (Closed) | On (Closed) 13 Off (Open) | Off (Open) | On (Closed) | Off (Open)
4 On (Closed) | On (Closed) | Off (Open) | On (Closed) 14 On (Closed) | On (Closed) | Off (Open) | Off (Open)
5 Off (Open) | On (Closed) | Off (Open) | On (Closed) | 15 | Off (Open) | On (Closed) | Of (Open) | Off (Open)
6 On (Closed) | Otf (Open) | Off (Open) | On (Closed) 16 On (Closed) | Off (Open) | Off (Open) | Off (Open)
7 Off (Open) | Off (Open) | Off (Open) | On (Closed) | 17 Off (Open) | Off (Open) | Of (Open) | Off (Open)
Table 3.C
Addressing PLC-5 I/O Processors
Off (Open) 7
01 Off (Open) | On (Closed) | On (Closed) | On (Closed) 10 On (Closed) | On (Closed) | On (Closed)
02 On (Closed) | Off (Open) | On (Closed) | On (Closed) 11 Off (Open) | On (Closed) | On (Closed) | Off (Open)
03 Off (Open) | Of (Open) | On (Closed) | On (Closed) | 12 On (Closed) | Off (Open) | On (Closed) | Off (Open)
PLC-5/15 processors can scan racks 01-03 13 Off (Open) | Off (Open) | On (Closed) | Off (Open)
04 On (Closed) | On (Closed) | Off (Open) | On (Closed) 14 On (Closed) | On (Closed) | Off (Open) | Off (Open)
05 Off (Open) | On (Closed) | Off (Open) | On (Closed) | 15 Off (Open) | On (Closed) | Off (Open) | Off (Open)
06 On (Closed) | Off (Open) | Off (Open) | On (Closed) 16 On (Closed) | Off (Open) | Off (Open) | Off (Open)
07 Off (Open) | Off (Open) | Off (Open) | On (Closed) 17 Off (Open) | Of (Open) | Off (Open) | Off (Open)
PLC-5/25 processors can scan racks 01-07
PLC-5/40 and 5/60 processors can scan racks 01-17
Each block uses 2 words of output image table memory and 2 words of
input image table memory. Each block occupies 1/4 rack of data table, with
4 blocks comprising 1 logical rack. Image table usage for one assigned
rack number is shown in Figure 3.2 (IOVA) and Figure 3.4 (IOVB). An
example of image table usage is shown in Figure 3.3 (IOVA) and
Figure 3.5 (IOVB).
Chapter 3
Configuring Your Block }/O for PLC
Family Programmable Controllers
Figure 3.2
1/0 Image Table for One Assigned Rack Number with 1791-10VA
Y Y Y
17
Input Image
10 7
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
1791-IOVA
1791-IOVA
1791-IOVA
1791-IOVA Rack 1
Output Image
О
DN pW =O
7
17
10 7
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
For 1791-IOVA - 7-0 input and 7-0 output image bits
Figure 3.3
10837-1
Input Table Usage Example for One Starting I/O Group with 1791-10VA
Les
PLC-2 Example
PLC-3, PLC-5, PLC-5/250 Example |
1 1 0 00 1 0 00
Type of 1/0 | Type of 1/0 T
1 = Input : | = Input
0 = Output /0 Bit O = Output
I/O Rack Number I/O Group Number 1/0 Rack Number
110
I/O Group
0 00 E
011
Block Data
34
I/O Group Number
input Image
Output Image
10838-1
Chapter 3
Configuring Your Block I/O for PLC
Famity Programmable Controllers
Figure 3.4
NO Image Table for One Assigned Rack Number with 1791-10VB
Input Image
17 10 7 0
0 Reserved
Y» 1 | Reserved]
2 Reserved
3» 3 | Reserved |
a. 4 Reserved
3 5 | Reserved |
6 Reserved
JJ» 7 | Reserved |
1791-10VB 1791-10VB 1791-IOVB 11/0 Rack
| | | Output Image
17 10 7 0
0 Reserved
1 | Reserved |
2 Reserved
3 | Reserved |
4 Reserved
5 | Reserved |
6 Reserved
7 | Reserved |
For 1791-10VB - 11-0 input and 5-0 output image bits
12269-1
Figure 3.5
Input Table Usage Example for One Starting 1/0 Group with 1791-10VB
PLC-2 Example, 1 5 00 PLC-3, PLC-5, PLC-5/250 Example | 1 2 00
Type of 1/0 | Type of 1/0 | |
1 = Input [ i | = Input i
0 = Output VO Bit O = Output 10 Bi
I/O Rack Number I/O Group Number I/O Rack Number I/O Group Number
112
: 615|4|3 = Input Image
Starting 113 | Ea SS
I/O Group Block Data
2 012 | ЧЕ
- E Output Image
013 : : Sr e 5 4 3
Block Data 12270)
Chapter Objectives
Setting the Configuration
Switches
Chapter
Configuring Your Block I/O for SLC
Controllers
In this chapter you will learn how to configure your block I/O when used
with SLC family controllers. This includes the following:
= setting the configuration switches
s addressing the block I/O
Refer to publication 1747—-NM004 Series A, “Distributed I/O Scanner,”
and publication 1747-NM00S Series A, “RIO Scanner” for complete
information on switch settings and addressing of the block 1/0.
Each block I/O module has two 6-position DIP switches for setting:
= block address
= transmission (baud) rate
= last state or reset
a DH-485 termination
These switches are accessible by opening the door on the left side of the
module (Figure 4.1).
Chapter 4
cet Your Block 1/0 for
SLC Controllers
Figure 4.1
Switch Settings for Block 1/0 when used with the SLC 500 Controller
St $2
Era
Е с our] 0 00000 0 COMM POWER 0
= nNUTO O O O OOOO O о
q
Baud Rate 5 | 6
Si 9 ON 230.4K On (0) | Off (1)
SCT |
“ET LI
Hold Last State} 4 |
LJ
|
Id (CS |
Block Switches SCI | «CT Not Used | Resetioo | Of(1)|
| Hold last state! On (0) |
Addresses 1-6 С ||
1-7 100000 to 111000
1-15 100000 to 111100
17-31 | 100010 to 111110 | DH-485 | 1 |
Switch as viewed from this end. | Terminate | On (0) |
| None [Off(1) |
On = Closed = 0 me 10629-!
4-2
Chapter 4
Lc Your Block 1/0 for
SLC Controllers
Table 4.A
Addressing S1.C 500 Controllers
2 On (0) | Off (1) | On (0) | On (0) | On (0) | On (0) 18 On (0) | Off (1) | On (0) 1 On (0) | Off (1) | On (0)
3 Off (1) | Off (1) | On (0) | On (0) 1 On (0) | On (0) 19 Off (1) | Off (1) | On (0} | On (0) | Off (1) | On (0)
4 On (0) | On (0) | Off (1) | On (0) | On (0) | On (0) 20 On (0) | On (0) | Off (1) on (0) | Off (1) | On (0)
5 Off (1) | On (0) | Off (1) | On (0) | On (0) | On (0) 21 Off (1) | On (0) | Off (1) | On (0) | Off (1) | On (0)
6
7
On (0) | Off (1) | Off (1) | On (0) | On (0) | On (0) Off (1) | On (0)
Off (1) | Off (1) | Off (1) | On (0) | On (0) | On (0) 23 | Off (1) | Off (1) | Off (1) | On (0} | Off (1) | On (0)
8 |On(0) | On (0) [ On (0) | Off (1) | On (0) | On (0) 24 On (0) On (0) | On (0) | Off (1) | Off (1) | On (0)
9 lof) jon | On (0) | Off (1) onto | Оп (0) | 25 | Off (1) | On (0) | On (0) | Off (1) | Off (1) | On (0)
10 On (0) | Off (1) | On (0) | Off (1) | On (0) | On (0) 26 On (0) | Off (1) | On (0) | Off (1) | Off (1) | On (0)
11 Jor) | ОН (1} | Оп (0) | ОВ (1} | Оп (0) | Оп (0) | 27 | | ОЖ (1) | Off (1) | On (0) | Off (1) | Off (4) | On (0)
12 | Оп (0) | Оп (0) [Off (1) | О# (1) | Оп (0) | Оп (0) | 28 | On(o) | On (0) | Off (1) | Off (1) | Off (1) | On (0)
13 | 08 (1) | Оп (0) | О (1) | О (1) | Оп (0} | Ол (0) | 20 | Off(1) | On (0) | Off (1) | Off (1) | Off (1) | On (0)
14 | On(o) [ Off(1) | Oif (1) | Off (1) | On (0) | Оп (0) | 30 | On (0) | Off (1) | Off (1) | Off (1) | Off (1) | On (0)
15 | Of(1) | Off (1) | Of (1) | Off (1) [ On(o) [On(0) | 31 | Off (1) | Off (4) | Off (1) | Off (1) | Off (1) | On (0)
№
©
3
<=
2
2
©
3
=
16 Invalid
Addressing the Blocks The SLC controller communicates with the block I/O using a Distributed
Using SLC Controllers I/O Scanner module (cat. no. 1747-DSN) or an RIO Scanner module (cat.
no. 1747—SN). The 1747-DSN scanner can address up to 7 blocks using an
SLC 5/01 Controller, and up to 30 blocks using an SLC 5/02 Controller.
The 1747-SN scanner, only used with the SLC 5/02 processor, can address
16 blocks. When used with the Distributed I/O Scanner module, block
addresses must be contiguous. The actual number of blocks to which the
1747-DSN scanner module will communicate is determined when
programming the SLC controller.
Refer to publication 1747-NM004 Series A, “Distributed 1/0 Scanner,
and publication 1747-NM005 Series A, “RIO Scanner” for complete
information on switch settings and addressing of the block 1/0.
Chapter Objectives
LED Indicators
Chapter
Troubleshooting
In this chapter you will learn about the LED indicators on the block Oo
module, and how to use them to troubleshoot the unit.
Each block 1/0 module has LED indicators (Figure 5.1) which provide
indication of module status. Each module has the following:
= green communication indicator — indicates whether communication is
occurring between processor or scanner and the block.
= red power indicator — indicates if power is applied to module and
internal hardware status
= 16 I/O status indicators (8 input—8 output or 10 input—6 output) — reflect
the state of the individual inputs and outputs (on or off)
Figure 5.1 shows the location of the indicators. Refer to Table 5.A for
status indications reported by the indicators.
Figure 5.1
Indicators on the Block I/O Module (1791-IOVA shown)
Status Indicators Communication LED (green) Power LED (red)
\ NA
N
Г Sé ourrur8 0 0 00000 ue poden 0
| mas INPUT 0000908000 оо
i
000000000 |0000000000000000000
ЭН |!!!!ITITTITITT TIT]
10846-1
5-1
Chapter 5
Troubleshooting
Table 5.À
Troubleshooting Chart
Green COMM LED on
Red POWER LED on
HO status LED on/off
Normal indication
None required
Red POWER LED flashing
Block failed self-test, or a major fault is detected.
Cycle power to the block. If problem persists,
replace the block.
Red POWER LED off
No 24V de power connected, or hardware fault.
Check 24V dc power to block
Green COMM LED off
No communication with processor, scanner etc.
Check that power LED is on. Make sure that
proper number of blocks are configured.
Check remote I/O link or distributed 1/O link wiring.
Green COMM LED flashing
Reset command (or output disable bit for SLC) has
been issued by processor or scanner.
Check program. Correct as necessary.
SLC or programmable controller not in run mode.
Place in run mode.
Appendix
Specifications
General Specifications
External power 200mA E 24V de; initial surge 5.5A for 10Lisec.
The supply must be able to source an additional 100mA
plus an inrush current of 400mA when a peripheral is
connected.
Environmental Conditions
Operating Temperature 32 to 131°F (0 to 55°C)
Storage Temperature -40 to 185°F (-40 to 85°C)
Relative Humidity 5 to 95% noncondensing
Conductors Wire Size
14 gauge stranded (maximum)
3/64 inch insulation (maximum)
Power Dissipation IOVA: 13.94 Watts (maximum); 9.62 Watts (typical)
IOVB: 13.05 Watts (maximum); 8.92 Watts (typical)
- Thermal Dissipation TIOVA: 47.7 BTUhr (maximum); 32.9 BTU/hr (typical)
IOVB: 44.6 BTU/hr (maximum); 30.5 BTUMr (typical)
Remote I/O Isolation
850V de (transformer) for 1 second
DH-485 Isolation 850V de (optocoupler) for 1 second
Interconnect cable length RIO: PLC 57.6K 10,000 cable-feet
115.2K 5,000 cable-feet
230.4K 2,500 cable-feet
SIC 230.4K 2,500 cable-feet
DH-485 4000 ft (1219 meters)
Cable requirements RIO/DIO - Belden 9463
DH-485 - Belden 9842
1791-I0VA Input Specifications
Number of Inputs 8
Input type Sourcing
Input voltage range 20.5 to 27.6V de
On-state input current 6.5mA (minimum) @ 20.5 de
On-state input voltage 20.5V de (minimum)
Off-state voltage 6.0V de (maximum)
Off-state current 1.5mA de (maximum)
Tum On time 1.5msec (maximum)
Tum Off time 1.0msec (maximum)
Appendix A
Specifications
A-2
1791-10VA Output Specifications
Number of outputs 8
Output type Sinking
Rated output voltage 10 to 30V de
Maximum on-state voltage drop — | 1.5V de 6 25%
Maximum on-state current 0.5A
Minimum on-state current 15mA
~ Surge Current | 8.0A for 10ms (maximum), 1 pulse per second max.
Off-state voltage 30V de (maximum) —
Off-state leakage current 0.5mA (maximum)
Turn on time 0.5ms (maximum)
Turn off time 1ms (maximum)
1791-ЮУВ Input Specifications
Number of Inputs 10
Input type Sourcing
Input voltage 20.5 to 27.6V de
On-state input voltage 20.5V de (Minimum)
On-state input current 6.5MA (minimum) E 20.5V de
Off-state voltage 6.00V de (maximum)
Off-state current 1.5mA dc (maximum)
Turn On time 1.5msec (maximum)
Turn Off time 1.0msec (maximum)
Appendix A
Specifications
1791-10VB Output Specifications
Number of outputs 6
Output type Sinking
Rated output voltage 10 to 30V dc
Maximum on-state voltage drop 1.5V dc @ 25°C
Maximum on-state current 0.5A
Minimum on-state current 15mA
Surge Current (maximum) 3.0A for 10ms (max), 1 pulse per second max.
Off-state voltage 30V dc (maximum)
Off-state leakage current 0.5mA (maximum)
Turn on time 0.5ms (maximum)
Turn off time
1ms (maximum)
B
block addressing, SLC, 4-3
С
compatibility, extended node
numbers, 2-10
configuration switches, 3-1
SLC, 4-1 |
connecting block I/O, in a PLC
system, 1-3
connecting wiring, 2-3
1791-IOVA, 2-4
1791-IOVB, 24
D
description, P-2, 1-1
DH-485 port, 1-2
E
extended node capability, 2-9
F
features, 1-1
|
I/O rack addressing
PLC-2 family, 3-2
PLC-3 and PLC-5/250, 3-3
PLC-5, 3-3
image table usage, 3-3
1791—IOVA, 3-4
1791-10VB, 3-5
L
LED indicators, 5-1
M
mounting dimensions, 2-3
р
power supply requirements, 2-5
R
related publications, P-2
remote I/O link connector, 1-2
remote I/O link wiring, 2-7
S
series connections
PLC-2, PLC-3 and PLC-3, 2-7
SLC, 2-8
sourcing inputs, 1-2
description, 1-2
sinking outputs, 1-2
description, 1-3
specifications, A-1
status indicators, 1-2
switch assemblies, 1-2
T
termination resistor, 2-9
troubleshooting chart, 5-2
types of block 1/0, 1-1
W
wiring cable, 2-6
wiring connections, definitions, 2-5
© 1992 Allen-Bradley Company, Inc.
PLC is a registered trademark of Allen-Bradley Company, Inc.
PLC-2is a registered trademark of Allen-Bradley Company, Inc.
PLC-3is aregistered trademark of Allen-Bradley Company, Inc.
PLC-5is aregistered trademark of Allen-Bradley Company, Inc.
PLC-S/250 is a registered trademark of Allen-Bradiey Company, Inc.
SLC is a registered trademark of Allen-Bradley Company, Inc.
(ТВ) ALLEN-BRADLEY
UY” A ROCKWELL INTERNATIONAL COMPANY
With offices in major cities worldwide
As a subsidiary of Rockwell Intemational, one of the world’s largest technology
companies — Allen-Bradley meets today’s challenges of industrial automation with over
85 years of practical plant-floor experience. More than 13,000 employees throughout the
world design, manufacture and apply a wide range of control and automation products
and supporting services to help our customers continuously improve quality, productivity
and time to market. These products and services not only control individual machines but
integrate the manufacturing process, while providing access to vital plant floor data that
can be used to support decision-making throughout the enterprise.
WORLD EUROPE/MIDDLE
HEADQUARTERS EAST/AFRICA
Allen-Bradley HEADQUARTERS
1201 South Second Street Allen-Bradley Europa B.V.
Milwaukee, WI 53204 USA Amsterdamseweg 15
Tel: (414) 382-2000 1422 AC Uithoorn
Telex: 43 11 016 The Netherlands
FAX: (414) 382-4444 Tel: (31) 2975/60611
Telex: (844) 18042
FAX: (31) 2975/60222
Publication 1791-6.5.6 — May 1992
Supersedes publication 1791-6.5.6 — November 1991
ASIA/PACIFIC CANADA LATIN AMERICA
HEADQUARTERS HEADQUARTERS HEADQUARTERS
Allen-Bradley (Hong Kong) Allen-Bradley Canada Allen-Bradley
Limited Limited 1201 South Second Street
Room 1006, Block B, Sea 135 Dundas Street Milwaukee, WI 53204 USA
View Estate Cambridge, Ontario N1R Tel: (414) 382-2000
28 Watson Road 5X1 Telex: 43 11 016
Hong Kong Canada FAX: (414) 382-2400
Tel: (852) 887-4788 Tel: (519) 623-1810
Telex: (780) 64347 FAX: (519) 623-8930
FAX: (852) 510-9436
P/N 955111-96
Copyright 1992 Allen-Bradley Company, Inc. Printed in USA
">