Allen-Bradley PLC 5 1785-L11B, 1785-L20B, 1785-L30B, 1785-L40B, 1785-L40L, 1785-L60B, 1785-L60L, 1785-L80B PLC System Overview

1785 Enhanced PLC5 Processors
(Cat. Nos. 1785-L11B, -L20B, -L30B, -L40B,
-L40L, -L60B, -L60L, -L80B
System Overview
Table of Contents
PLC5 Processors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Multiple Programming Language Support . . . . . . . . . . . . .
2
relay ladder logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
structured text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
sequential function charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
5
5
Powerful Program Control Features main control programs
6
processor interrupt routines . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
PID algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
Password and Privilege System Protection . . . . . . . . . . . .
7
Advanced Math Functions . . . . . . . . . . . . . . . . . . . . . . . . .
7
Coprocessing Options . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
Builtin Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
Configurable Communication Port . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Processors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC5 Ethernet Interface Module . . . . . . . . . . . . . . . . . . . . . . . . .
8
9
9
Extendedlocal Processors . . . . . . . . . . . . . . . . . . . . . . . .
10
VME Processors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
Selecting a Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
Input/Output Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting a Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processor Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
15
19
20
21
EEPROM Module Memory . . . . . . . . . . . . . . . . . . . . . . . . .
21
ii
Table of Contents
Expand System Fault Tolerance . . . . . . . . . . . . . . . . . . . . .
21
Coprocessor Programming Flexibility . . . . . . . . . . . . . . . . . . . . . .
Integrating the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
22
RSView Man/Machine Interface Software . . . . . . . . . . . . . .
22
Open Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCADA Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ethernet Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ControlNet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DeviceNet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.I. Series Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AllenBradley Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For More Information ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What to Do Next . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparing to Layout a PLC5 System . . . . . . . . . . . . . . . . . . . . . .
24
24
25
26
27
28
28
29
30
31
32
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Introducing the PLC5 System
PLC-5 with
1785-ENET Module
Remote I/O
Remote
1771–I/O
Chassis
1791-IOBX
128-point Block
Flex I/O
1791-16AC
32-I/O
Block
PanelView
Operator
Interface
1336 PLUS Drive
1400-PD
Power Monitor
Display Module
Flex I/O
1747-ASB
1794-CE1
1ft. extender
cable
Flex I/O
20063–M
PLC5 processors are highspeed, singleslot processors you can use for control and information processing.
These processors offer advanced programming features and versatile communication options to fit your unique
application.
This book introduces Enhanced PLC5 processors which include PLC5/11, 5/20, 5/30, 5/40, 5/40L, 5/60,
5/60L, and 5/80 processors. We use the term PLC5 processors to signify Enhanced PLC5 processors.
For more
information...
0
Keep in mind that PLC5 processors are designed for larger sequential and regulatory control applications with
specialized I/O requirements and/or the need to coordinate with other processors and devices. If your
application is a simple analog or discrete one, requiring a smaller amount of I/O or memory, you may want to
consider a SLC processor. For more information about SLC processors, see the SLC System Overview,
publication 17472.30.
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Using this Book
Use this book to approximate your needs and to begin to lay out a
PLC-5 system that fits your particular application. With the help of
this book, you’ll see how easy it is to configure and use a PLC-5 system.
For information about:
processor features and capabilities
selecting a processor
input/output selections
selecting I/O
selecting a chassis
selecting a power supply
processor options
integrating a system
open architecture support
programming software
support services
preparing to layout a system
See page:
2
11
12
15
19
20
21
22
24
28
29
32
At the back of this book, we include guidelines to help you consider each
option and to begin to lay out a system. Follow these guidelines as you
move through each section of this book. If you need more information,
please call your Allen-Bradley representative.
1
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
PLC5 Processors
All PLC5 processors share the following common features:
Multiple Programming Language Support
structured text, sequential function charts, ladder logic, function block
Powerful Program Control Features
16 main control programs,
time and eventdriven processor
interrupt routines, PID algorithms
Advanced Instruction Set
includes basic and advanced ASCII string
instructions, and advanced math functions
Builtin Communications
RS232/422/423, Data Highway Plus,
Remote I/O Control Network,
remote I/O communication distances
up to 10,000 feet or 3,048 meters
System Protection
passwords and privileges
communication backup module
Program Execution Speed
0.5ms/k bit instructions,
2ms/k typical mix
The next few pages describe these features. See page 11 to select a processor.
Environmental Conditions:
operating temperature: 0 to 60° C (32140° F)
storage temperature: 40 to 85° C (40 to 185° F)
relative humidity: 595% (without condensation)
Time of Day Clock and Calendar (battery backed):
maximum variations at 60° C: +/ 5 min per month
typical variations at 20° C: +/ 20s per month
timing accuracy: one program scan
Note: calendar updates appropriately each year,
including the year 2000
Agency Certification:
CSA certified, CSA Class I, Division 2,
Groups A, B, C, D, UL listed
CE marked for all applicable directives
(when product or packaging is marked)
Shock:
Operating: 30 g peak acceleration for 11±1 ms duration
Nonoperating: 50 g peak acceleration for 11±1 ms duration
Vibration Testing (operating and nonoperating):
1 g @ 10 to 500 Hz
0.012 inches peaktopeak displacement
Location: 1771I/O chassis, leftmost slot
Multiple Programming
Language Support
2
PLC5 processor
Communication:
Data Highway Plust (trunk line: 3048 cablem (10,000 cableft);
drop line: 30.4 cablem (100 cableft)
Data Highway (DH) using 1785KA
Serial
Ethernet (TCP/IP protocol, 15pin AUI transceiver port)
remote I/O
extendedlocal I/O (PLC5/40L and 5/60L processors only)
Backplane Current:
2.3A (PLC5/11t, 5/20t, 5/30t)
3.3A (PLC5/40t, 5/40Lt, 5/60t, 5/60Lt, 5/80t, 5/86t)
3.6A (PLC5/20Et, 5/40Et, 5/80Et)
Processor Weights:
PLC5/20, 5/26:
1.21 kg (2.7 lbs)
PLC5/30:
1.20 kg (2.6 lbs)
PLC5/40, 5/46, 5/40L: 1.42 kg (3.1 lbs)
PLC5/60, 5/60L:
1.42 kg (3.1 lbs)
PLC5/80, 5/86:
1.42 kg (3.1 lbs)
PLC-5 processors support multiple industry-standard programming
languages; you can program logic in IEC 1131-based structured text,
function block, sequential function charts, or ladder logic. This
versatility means you can maintain and troubleshoot programs in the
same language that you develop them in.
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
relay ladder logic
All PLC-5 processors support the following built-in instructions:
Relay
Sequence
1, 2 ... 6
Shift Register
bit
→←
Compute
Conversion
x'y
Examine On (XIC)
Examine Off (XIO)
Energize (OTE)
Latch (OTL)
Unlatch (OTU)
Sequencer Input (SQI)
Sequencer Output (SQO)
Sequencer Load (SQL)
Smart Directed Sequencer (SDS)
Diagnostic Fault Annuciator (DFA)
Bit Shift Left (BSL)
Bit Shift Right (BSR)
Compute (CPT)
Multiply (MUL)
Negate (NEG)
Sine (SIN)
Square Root (SQR)
Sort File (SRT)
Subtract (SUB)
Tangent (TAN)
Arc Sine (ASN)
Arc Cosine (ACS)
Convert to BCD (TOD)
Convert from BCD (FRD)
Degree (DEG)
Radian (RAD)
Timer/Counter
Timer On Delay (TON)
Timer Off Delay (TOF)
Retentive Timer On (RTO)
Count Up (CTU)
Count Down (CTD)
Timer and Counter Reset (RES)
File
File Arithmetic and Logic (FAL)
File Search and Compare (FSC)
File Copy (COP)
File Fill (FLL)
Logical
Log to the Base 10 (LOG)
Natural Log (LN)
Divide (DIV)
Cosine (COS)
Clear (CLR)
Average File (AVE)
Arc Tangent (ATN)
Addition (ADD)
Standard Deviation (STD)
X to the Power of Y (XPY)
FIFO Load (FFL)
FIFO Unload (FFU)
LIFO Load (LFL)
LIFO Unload (LFU)
AND
NOT
OR
Exclusive Or (XOR)
3
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Compare
Move
Compare (CMP)
Equal To (EQU)
Greater than or Equal to (GEQ)
Greater than (GRT)
Less than or Equal to (LEQ)
BIt Distribute (BTD)
Move (MOV)
Masked Move (MVM)
I/O Message
Block Transfer Write (BTW)
Block Transfer Read (BTR)
Message (MSG)
Program Control
Jump (JMP)
Label (LBL)
Break (BRK)
Subroutine (SBR)
Return (RET)
Master Control Reset (MCR)
User Interrupt Disable (UID)
ASCII
PID
Diagnostic
Specialty
Special
Less than (LES)
Limit Test (LIM)
Mask Compare Equal to (MEQ)
Not Equal to (NEQ)
User Interrupt Enable (UIE)
For Next Loop (FOR, NXT)
Jump to Subroutine (JSR)
End of Transition (EOT)
Temporary End (TND)
Always False (AFI)
Sequential Function Chart Reset (SFR))
Test Buffer for Line (ABL)
ASCII Write (AWT)
ASCII String to Integer (ACI)
ASCII String Search (ASC)
ASCII String Extract (AEX)
ASCII Integer to String (AIC)
ASCII Set or Reset
ASCII Write with Append (AWA)
Handshake Lines (AHL)
ASCII String Comapre (ASR)
ASCII String Concatenate (ACN)
ASCII Read Line (ARL)
Number of Characters in Buffer (ACB)
ASCII ReadCharacters (ARD)
Proportional, Integral, Derivative (PID)
File Bit Comparison (FBC)
Diagnostic Detest (DDT)
Data Transitional (DTR)
One Shot (ONS)
One Shot Rising (OSR)
Immediate Output (IOT)
One Shot Falling (OSF)
Immediate Input (IIN)
This broad range of instructions can save you time in developing programs
by providing the instructions you need ready-made for your application.
4
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
structured text
Programming Example
IF (T4:0.DN) THEN
TON (T4:0,0.01, 100, 0);
ELSE
RES (T4:0);
END_IF;
IF (!(T4:0.DN) THEN
TON (T4:0, 0.01,100, 0);
ELSEIF (T4:0.DN) THEN
RES (T4:0);
END_IF;
Structured text resembles BASIC programming and you can use it to easily
create, edit, and execute complex algorithms that involve variables
representing a wide range of data types. Structured text works well in the
following types of applications:
data handling
decision making
■
■
■
■
computational sorting
intensive mathematical
With Allen-Bradley’s structured text option, you can use the
PowerTexttmonitoring tool to integrate real-time data table values with a
structured text source program. See the example on the left.
Structured text supports the following constructs for PLC-5 processors:
Variable Assignment
Nonretentive Bit Assignment
Make binary assignments to a storage bit. These bits are cleared to 0 when
the processor mode changes from Program to Run or when the SFC step is
postscanned.
Make binary assignments to a storage bit. These bits are not
cleared to 0 when the processor mode changes from Program to
Run or when the SFC step is postscanned.
IFELSIFELSE
Conditionally execute a section of code.
FOR
Repeat a section of code a specified number of times.
WHILE
Repeat a section of code as long as an input expression is true.
REPEAT
Repeat a section of code until an expression
becomes true.
EXIT
Exit an iterative construct (REPEAT, FOR, or WHILE) before the
processor reaches the normal termination condition.
CASE
Conditionally execute a section of code based on the value of a
math expression or operand.
Provided for IEC 11313 compatibility, similar to an NOP statement.
;;
Call as a function almost any ladder instruction.
You can use sequential function charts (SFCs) to control and display the
state of a control process. Instead of one long ladder or structured text
program for your application, divide the logic into manageable steps
and transitions.
Mixer 1
In this simple SFC, the logic for the mixer
step is executed repeatedly until its
transition is true. Then the processor
executes the dump logic repeatedly
until its transition is true.
:=
Retentive Bit Assignment
RETAIN
Ladder Functions
sequential function charts
Assign an integer or a floating point value to a data table location.
:=
7
9
Dump 1
A step corresponds to a control task; a transition
corresponds to a condition that must occur before the
processor can perform the next control task. By
displaying these steps and transitions, you can see the
state of a machine process at any time.
8
10
5
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Powerful Program Control Features
main control programs
You can use any mix of SFC, ladder, and structured text programs to
define up to 16 main control programs (MCPs). Use several MCPs to
define one main control program for each particular machine or function
of your process.
For example, you can specify an SFC program to define the order of events
in a process and a separate ladder logic or structured text program to
directly control the outputs. Each of these can be an MCP. This lets you
independently execute SFCs, ladder logic and structured text to structure
your application into functional units and ease troubleshooting.
processor interrupt routines
You can specify both time- and event-driven interrupt routines for PLC-5
processors. Use selectable timed interrupts (STIs) when you want a portion
of logic to execute at a specified time interval. For example, you can use
an STI to monitor a machine’s position every 250ms and calculate the
average rate-of-change.
Use processor input interrupts (PIIs) when you want to execute a portion of
logic immediately when an event occurs. For example, you can use a PII to
eject a faulty bottle from a bottling line. A PII can detect an event within
100 microseconds and can act on successive events within 3 milliseconds.
PID algorithms
You can use Proportional Integral Derivative (PID) closed-loop control to
hold a process at the set point you want. The PID instruction lets your
processor monitor and control process loops for quantities such as
pressure, temperature, flow rate, and fluid level. PID algorithms feature the
following:
features
equations expressed in ISA or Independent Gains
output alarms
output limiting with antireset windup input and output transfer from 04095 (12bit analog)
manual mode (with bumpless transfer) input scaling in engineering units
feedforward or output biasing
zerocrossing deadband
displaying and monitoring PID values derivative term (can act on PV or error)
direct or reverse acting control
6
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
You can protect your programs using the processor’s built-in passwords
and privileges feature.
Set up to four privilege classes, each with access to different
software operations. You can use passwords and privileges
to protect:
overall privilege classes
channels
stations/nodes
individual programs and data files
generate a report to list the
privileges you have assigned
Advanced Math Functions
Coprocessing Options
Data Highway Plus
Password and Privilege
System Protection
maintenance terminal
read only access for file 1
privilege class 2
system administrator
read/write access
privilege class 1
You can use a floating point data table file and the advanced math
functions to perform complex calculations. Advanced math functions
include logarithmic, trigonometric, statistical, exponential and square
root functions.
PLC-5 processors offer a built-in side connection that lets you
connect directly to a control coprocessor module or Ethernet module. This
connection also lets you access an Ethernet network with the processor.
See page 21 for more detailed information about coprocessor modules.
See page 9 for more information about Ethernet options.
7
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Builtin Serial Port
The serial port lets you interface with various
modems to support Supervisory Control and
Data Acquisition (SCADA) applications. For
more information about SCADA applications,
see page 24 or see the SCADA System
Application Guide, publication AG6.5.8.
For more
information...
PLC-5 processors offer a built-in serial port that you can configure
for RS-232C, RS-423, or RS-422A communication. This serial port works
directly with Allen-Bradley serial equipment so you don’t need to buy
anything extra.
You can use the processor’s serial port to connect the processor to other
Allen-Bradley and non-Allen-Bradley devices that:
can send and receive ASCII characters
communicate using DF1 protocol
The processor’s serial port supports these configurations:
Keep in mind that when you configure channel 0
for RS422A compatibility, you should not use
terminating resistors anywhere on the link.
When you configure channel 0 for RS422A
compatibility and RS423, do not go beyond
200 feet regardless of baud rate.
Configurable Communication Port
For more
information...
RSPort:
Maximum Cable Length:
232C
422A
423
15 m (50 ft)
61 m (200 ft)
61 m (200 ft)
PLC-5 processors offer built-in, configurable Data Highway Plus (DH+) or
Remote I/O (RIO) ports. DH+ supports data transfer and remote
programming for factory-floor applications in addition to peer-to-peer
communications between other processors and devices. Remote I/O
supports real-time data exchange for control of plant-floor devices.
With 6200 PLC-5 programming software, you can program PLC-5
processors over your DH+ network. This means that you can connect a
single industrial terminal to your network and use it to program all the
PLC processors on your network. You can also use DH+ modules to
implement a SCADA network. For more information about SCADA
applications, see page 24 or see the SCADA System Application Guide,
publication AG-6.5.8.
The remote I/O network connects chassis-based I/O and other compatible
intelligent RIO devices to PLC-5 processors. Allen-Bradley designs its
devices to be compatible with this link. Other vendors offer products that
are also compatible with remote I/O network links. These products include
robotic and welding controllers, scales, and wireless modems.
You can use the RIO link to speed communications and let the devices
work together to improve quality while lowering integration, maintenance,
and training costs.
I/O chassis and other devices on the link can be mounted up to 10,000 feet
or 3,048 meters away from PLC processors. Or, for distributed processing,
you can put a processor right at the I/O chassis where it can monitor its
own resident I/O while communicating with a supervisory controller over
the remote I/O link.
8
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Ethernet Processors
Dedicated
Ethernet Port
Ethernet PLC-5/20E, -5/40E, and -5/80E processors offer embedded
Ethernet TCP/IP communication capabilities; these processors provide the
integration of Allen-Bradley architecture into an industry-standard
Ethernet TCP/IP system, offering flexible, open-system solutions.
With the Ethernet processors’ built-in communication capabilities, you
have access to the entire Allen-Bradley control, communication, and
information architecture. The Ethernet processors are optimized for
real-time sequential and regulatory control and offer extensive application
flexibility. See page 25 for more information about Ethernet solutions.
PLC5/20E PLC5/40E and
processor 5/80E processor
PLC5 Ethernet Interface Module
Enhanced
PLC5/40
The PLC-5 Ethernet Interface Module is a single-slot module that attaches
to the side of any Enhanced PLC-5 Series B or later processor to provide
Ethernet connectivity for the attached processor.
When used with
The interface module provides
Enhanced PLC5 processor
Ethernet connectivity without sacrificing DH+/RIO ports
ControlNet PLC5 processor
Ethernet connectivity
Ethernet PLC5 processor
the ability to operate dual Ethernet links
1785ENET
interface module
9
1785 Enhanced PLC5 Processors System Overview
Introducing PLC5 Processors
Extendedlocal Processors
Extendedlocal
Port
For more
information...
With PLC-5/40L and -5/60L processors and an extended-local
I/O adapter module, you can use an extended-local I/O link to speed I/O
updates. The extended-local I/O link is a parallel link that enables a
PLC-5/40L or -5/60L processor to scan a maximum of 16 extended-local
I/O chassis. Extended-local I/O chassis are updated in less than .5
milliseconds and can be connected up to 100 feet away from the chassis.
For more information about PLC-5/40L and -5/60L processors, see the
Enhanced PLC-5 Programmable Controllers User Manual, publication
1785-6.5.12.
PLC5/40L and
5/60L processor
VME Processors
With PLC-5/VME VMEbus programmable controllers (PLC-5/VME
processors), you can bring the technology of PLC-5 processors to the
VMEbus environment. PLC-5/VME processors are functionally equivalent
to other PLC-5 processors, but also:
plug into a VMEbus system
have a VMEbus communication interface designed for use with other
VMEbus CPU modules
can access VMEbus I/O modules
PLC5/V30B PLC5/V40B PLC5/V40L
processor
processor
processor
For more
information...
10
For more information about PLC-5/VME processors, see the PLC-5/VME
User Manual, publication 1785-6.5.9.
System Overview
Introducing PLC5 Processors
Selecting a Processor
All PLC5 processors share the common features described in the previous section, and
some offer special communication options. Choose the right PLC5 processor for your
application by selecting the processor that meets the I/O, memory, and communication
requirements to control your process. See the table below.
I/O Count:
Memory:
Communication ports:
Processor:
256 (any mix)
8K
1 DH+/Remote I/O
PLC5/11
512 (any mix)
1024 (input +output)
16K
1 DH+, 1 DH+/Remote I/O
PLC5/20
1 DH+, 1 DH+/Remote I/O, 1 Ethernet
PLC5/20E
1024 (any mix)
1024 (input +output)
2048 (any
( y mix))
2048 (input +output)
32K
2 DH+/Remote I/O
PLC5/30
48K
4 DH+/Remote I/O
3072 (any mix)
3072 (input +output)
64K
2 DH+/Remote I/O, 1 Local I/O
2 DH+/Remote I/O, 1 Ethernet
4 DH+/Remote I/O
PLC5/40
PLC5/40L
3072 (any mix)
3072 (input +output)
100K
PLC5/40E
PLC560
2 DH+/Remote I/O, 1 Local I/O
PLC5/60L
4 DH+/Remote I/O
PLC5/80
2 DH+/Remote I/O, 1 Ethernet
PLC5/80E
example
REQUIREMENTS: You have 2,000 I/O points and need 50K of memory.
You also want Ethernet access.
Use the selection chart above to find which processors support your I/O count.
In this case, the PLC5/40, 5/40L, 5/40E, 5/60, 5/60L, 5/80, and 5/80E
processors all support your I/O count.
Use the chart to find which of those processors support your memory requirements.
In this case, only the PLC5/60, 5/60L, 5/80, and 5/80E support both your I/O
count and your memory requirement.
Use the chart to find which of those processors support your
communication requirements.
In this case, you would select the PLC5/80E, because only the PLC5/80E
supports Ethernet access, along with your I/O and memory requirements.
11
1785 Enhanced PLC5 Processors System Overview
Input/Output Selections
Input/Output Selections
Allen-Bradley offers over 90 types of I/O modules and has 3 million
modules installed in applications worldwide. 1771 series I/O is the
industry’s largest selection of I/O modules and addresses a broad range of
manufacturing and process control applications.
We offer both rack- and block-based I/O selections.
PLC5/40
Remote I/O
PanelView
Operator
Interface
Remote
Rack
1771ASB
1791IOBX
128point Block
1336 Drive
Flex I/O
179116AC
32point
Block
1400PD
Power Monitor
Display Module
Flex I/O
1747ASB
AB
The following sections outline the available I/O selections. For more
information about any of these selections, contact your Allen-Bradley
representative. The following types of documents may assist you:
■
■
■
12
product bulletins
product datas
user manuals
■
product catalogs
selection guides
■
simplified schematics
■
■
■
■
reference guides
installation datas
application notes
20063
1785 Enhanced PLC5 Processors System Overview
Input/Output Selections
1771 series I/O offers over 90 modules to handle
your discrete, analog, or special requirements.
1771 modules feature:
■
■
■
1794 series I/O (Flex I/O) is a flexible, lowcost, modular
I/O system for distributed applications. Because flex I/O
combines a terminal strip with an I/O interface, you can
use the terminal strip on the terminal base to wire your field
devices directly. Direct wiring saves you:
installation and testing time
additional wiring and external terminal blocks
control panel space
Combining your field wiring terminations and the I/O
interface into the same location saves you time and
money and makes your system easier to maintain and
troubleshoot.
a broad range of signal interfaces to ac and dc
sensors/actuators to fit your application
modules available in different densities for up to 32 I/O
for greater flexibility and cost savings
wide range of signal levels including standard analog
inputs and outputs and direct thermocouple and RTD
temperature inputs
1794 modules feature:
■
■
■
■
■
modularity of design: reduces costs by solving a large range
of application requirements with one I/O architecture
small size: reduces packaging costs
individual wire termination locations: reduces purchasing
costs and complexity, as well as packaging costs
diagnostics and removal and insertion under power
capability: lowers the mean time to repair equipment
and leverages your control investment
flexible communications: helps to control future costs by
providing an economical migration path
13
1785 Enhanced PLC5 Processors System Overview
Input/Output Selections
1746 series I/O is modular in its hardware design and
offers a cost and spaceeffective means to add I/O
modules to your control system. I/O modules are
available in 4, 8, 16, and 32point densities so that you
can place many I/O modules in a single location.
1746 modules feature:
■
■
■
highdensity 32point and combination modules: reduces
rack size and panel space requirements
removable terminal blocks on 16point modules: you can
easily wire and replace modules
industrial design: input filtering and optical isolation for
exceptional reliability in industrial applications
1791 series block I/O puts its power in one small
package so you can distribute your I/O more efficiently
and install your system more cheaply than with
comparable chassisbased I/O.
1791 modules feature:
■
■
■
14
a selfcontained package that provides costeffective
distribution of as few as 16 discrete I/O points to a
remote location
small size that lets you install blocks in a protected area of
a machine or process
you can panel or DINrail mount most 16 and 32point ac,
dc, and analog blocks in a vertical or horizontal operation
1785 Enhanced PLC5 Processors System Overview
Selecting I/O
Selecting I/O
Select I/O to match the electrical requirements of your field devices. The
following charts highlight the available modules.
1771 Standard Analog I/O Modules (12bit resolution)
Channel
Update/Resolution
25ms/8 channels
15 bits+sign
(0.1°C/0.1° F/bit)
Voltage Range
Type B, E, J, K,
R, S, T
±99.99mV
Current Range
N/A
Data Format
Binary only
6 RTD inputs (three wire)
50ms/8 channels
16 bit resolution
(0.1°C/0.1° F/bit)
100W platinum
10W copper or
other
N/A
Binary or BCD Actual temperature or
Ohm readings
4 isolated outputs (1000 V)
8.0ms/4 chnls (BCD)
1.6ms/4 chnls (Binary)
12bit res + sign
15V dc
010V dc
±10V dc
420 mA
050 mA
Binary or BCD Scaled to ±9999
Type
HighRes
TC/mV Input
Number of Inputs/Outputs
8 floating differential
RTD Input
Analog Output
1771 High Resolution Analog I/O Modules (16bit resolution)
Input
Type
Number of Inputs
Output Types
Type
Number of Outputs
Current
420mA
0, 2, 4, 6, 8
Current
025mA, 050mA
0, 2, 8
MV/TC
B, R, S,E, J, K, T
Voltage
"10V dc
RTD
Platinum, Nickel, Copper
Voltage
"10V dc, "5Vdc
BuildtoOrder Program: We will quote you a custom configuration when you tell us your type and number of input and output requirements.
Contact your AllenBradley representative for details.
1771 Discrete Output Modules
Number of Modules
Type
Voltage Category
Number of Outputs
Current Per Output
2
ac
24
8,, 16
1.5A,, 2.0A
Applications
■
■
7
120
4, 6, 8, 16
■
■
■
■
3
1
2
6
dc
220
120/220
5 TTL
66, 8,
8 16
32
8, 16
10-60
8, 16, 32
22.0A
0A
0.3A
0.2A sinking
0.001A sourcing
.5A, 1A, 1.5A, 2A
■
■
■
■
■
2
10-32
16-32
0.5A, 2A
■
■
■
Relay coil driver
Low voltage inductive loads
Protected ac output
Isolated circuits
Individually fused
General purpose
General purpose
p p
TTL interfaces
V dc output signal termination
Isolated circuits
electronic fusing/current limiting
isolated circuits
general purpose
+V dc output signal termination
15
1785 Enhanced PLC5 Processors System Overview
Selecting I/O
1771 Process Control I/O Modules
Module
Number of Inputs/ Outputs
PID Control Module
2 PV inputs
2 tieback inputs
2 outputs
External Power
Required
Channel Update/ Resolution
Voltage
Range
Current
Range
Data
Format
±15V dc
100ms (Loop) 12 bit resolution
15V dc
420 mA
Scaled BCD
±9999
1771 Discrete Output Relay Modules
Number of Modules
4
Operating Voltage
24138 V ac
24125 Vdc
(30 watts max)
Number of Outputs
8, 16, 32
Current Per
Output
0.25A-2A
1
0250 ac
0175 dc
4 isolated
2A @ 200V ac
4 selectable
2
024 ac/dc
8
(4 groups of 2)
0.1A
4 N.O., 4 N.C., 8 N.O.
Contacts
8 selectable-32
selectable
Applications
mixed voltages
■ no leakage current
■ isolated
■ signal switching
■ isolated circuits
■ physical isolation
■ low power dissipation
■ no leakage current
■
1771 Discrete Input Modules
Number of
Modules
2
Type
Sinking or Sourcing
Voltage Current
ac/dc
/
n/a
/
24
Number of
Inputs
8,, 16
120
6, 8,
6,
8, 16,
16, 32
220
6, 8, 16
5
Applications
■
■
■
3
ac/dc
■
■
2
7
2
dc
dc
TTL
sinking
sourcing
sinking, sourcing
5
10-60
10-30
5-32
8,16
8,16, 32
8, 32
8, 16
■
■
Generalpurpose
General ppurpose
Generalpurpose
p
Isolatedcircuit multiphase applications
Generalpurpose
Isolatedcircuit multiphase applications
Generalpurpose
Generalpurpose
p p
1771 Specialty I/O Modules
1771 Communication I/O Modules
FiberOptic Converters
Local I/O Adapters
Remote I/O Adapters
I/O Scanners
1771 Specialized Modules
Configurable Flowmeter Module
Highspeed Logic Controller
Latching Input Module
Wire Fault Module
Multiplexer input Module
Clutch/Brake Control System
Simulator I/O Module
Vision Input Module
Power System Line Synchronization Module
16
1771 Positioning Modules
Stepper Positioning Modules
Servo Positioning Modules with and without
Contouring
Absolute Encoder Modules
Gray Code Encoder Modules
Injection Control Modules
Force Control Modules
Highspeed Control Modules
1771 Peripheral Interface Modules
ASCII and BASIC module
RS232/422/423 Modules
1785 Enhanced PLC5 Processors System Overview
Selecting I/O
1791 Analog I/O Blocks
Number of
Blocks
I/O Block
Power Source
Inputs
Number of Inputs
Resolution
Ranges
Outputs
Number of Outputs
Resolution
Ranges
2
85120V ac
4
14 bits
"10V;; "5V
0 10V 005V
010V;
5V
020 mA
(block supplies
loop power)
2
13,, 14 bits
"10V,, 020 mA
19.230V dc
1791 Discrete I/O Blocks
Inputs
Number of
Blocks
I/O Block
Power
Source
9
19.230V dc
Outputs
Type
Number of
Inputs
1030V dc sinkingg
0,, 8,16,24,
, , , 32
Type
Number of
Outputs
Max Current Per Output
(All outputs on unless
otherwise noted)
1030V dc sourcing
0,, 8,16,
, , 32
500 mA at 60°C-1A at 30°C
contact
85120V ac
79132V ac
1826.4V dc
1826.4V dc sourcing
20132V ac
300 mA at 60°C-600 mA at 30°C
contact
4
32,, 64
1826.4V dc sinking
1826.4V dc sinking
32,, 64
300 mA at 60°C
1826.4V dc sourcing
1746 Discrete Input Modules
Number of Modules
Type
Voltage Category
Number of Inputs
Applications
3
AC
85132V
4,, 8,, 16
Generalpurpose 120V ac inputs
170265V
1
Generalpurpose 220/240V ac inputs
5V sourcing
16
TTL input, BCD inputs
3
1030V sourcing
8, 16
Generalpurpose dc inputs; fast response for timecritical applications
1
24V sourcing
32
Generalpurpose dc inputs; highdensity for limited panel space
2
1030V sinking
8, 16
Generalpurpose dc inputs; fast response for timecritical applications
1
24V sinking
32
Generalpurpose dc inputs; highdensity for limited panel space
24V
16
V ac or V dc operation
1
DC
AC/DC
1746 Discrete I/O Combination Modules
Number of Modules
Voltage Types
Number of Inputs
Output Voltage Types
Number of Outputs
Applications
3
85132V ac
2,, 4,, 6
5265V ac
2,, 4,, 6
Combination 120V ac inputs
p and relayy
contact outputs
o tp ts
5125V dc
relay contact
1746 Discrete Output Modules
Number of Modules
Types
Voltage Category
Number of Outputs
Current Rating
@ 60° C
Applications
2
AC
85265V
8,, 16
.25A ,5A
Generalpurpose 120/240V ac outputs
4
DC
550V sourcing
.5A 1A
Generalpurpose dc outputs
.25A 1A
TTL loads; sourcing BCD devices
5
4
relay contact
550V sinking
832
5265V ac
4, 8, 16
5125V dc
individual isolation
4outputs/common
8 t t /
8outputs/common
17
1785 Enhanced PLC5 Processors System Overview
Selecting I/O
1746 Analog I/O Modules
Type
Number of
Inputs
Input Voltage
Range
analogg input
p
4
±10V dc
Number of
Outputs
Output Voltage
Range
60ms @95% step res.
±20ma
analogg output
p
analogg combination
thermocouple/mv
p
16 bit resolution
4
±10V dc
2
4
Channel Update/Resolution
020ma
2.5ms @95% step res.
±10V dc
14 bit resolution
2
60ms @95% step res.
±20ma
output 2.5ms
020ma
16 bit resolution
J, K, T
12ms @ 100% step res.
E, R,S
.1° C, .1° F
±50mv
0.01mV
±100mv
1746 Specialty I/O Modules
1746 Communication I/O Modules
SLC 500⇒DH485 Interface
Direct Communication Module
Remote I/O Scanner
Remote I/O Adapter
1746 Peripheral Interface Modules
1746 Positioning Modules
Basic Module
RS232⇒DH485 (DF1 protocol)
RS422
RS485
Single Axis Servo Controller Module
Highspeed Counter Coder Module
1794 Flex I/O System Components
Communication Adapters
Terminal Bases
Discrete and Analog I/O Modules
RIO
2 wire or 3 wire
Type
Voltage
Number of Points
DC, sinking, input
24V dc
16
DC, sourcing, output
Sensor input
AC input
8
120 V ac
8
010
8
AC output
Analog input
±10
Analog output
420mA
020mA
18
4
1785 Enhanced PLC5 Processors System Overview
Selecting a Chassis and Power Supply
Selecting a Chassis
If you use 1771 or 1746 I/O modules, you will need to select a chassis
when you specify your system. You should consider the following when
you select a chassis:
When you determine the maximum number of I/O in your application,
leave space for the I/O slots dedicated to power-supply modules,
communication modules, other intelligent I/O modules, and expansion.
4-Slot
I/O chassis are available in four sizes:
For 1771 Modules:
For 1746 Modules:
■
4-slot
■
12-slot
■
4-slot
■
10-slot
■
8-slot
■
16-slot
■
7-slot
■
13-slot
For 1771 I/O modules, you can also choose a chassis with an integral
power supply and remote I/O adapter. The two types are:
■
■
1-slot
2-slot
For 1746 I/O modules, you can also choose an optional 2-slot expansion
chassis that provides up to 64 additional points of I/O or an interface to
specialty I/O modules.
19
1785 Enhanced PLC5 Processors System Overview
Selecting a Chassis and Power Supply
Selecting a Power Supply
You will also need to select a power supply when you specify your system.
When you’re ready to select a power supply, these are guidelines you
should follow:
1.
Determine the input voltage for the power supply.
2.
Calculate the total backplane current draw for I/O modules by
adding together the backplane current draw for each I/O module in
that chassis.
3.
Add to the total of the I/O module backplane current draw either:
4.
5.
a.
3.3 Amps when the chassis will contain a PLC-5 processor or
b.
1.2 Amps when the chassis will contain either a remote I/O
1771-AS or -ASB module or a 1771-ALX extended-local I/O
adapter module
If you leave slots available in your chassis for future expansion:
a.
list backplane current draw for future I/O modules
b.
add the total current draw for all expansion I/O modules to the
total calculated in step 3
Determine whether the available space for the power supply is in the
chassis or mounted external to the chassis.
Choose your power supply using the input voltage requirement and the
total backplane current draw you just determined.
For 1771 I/O modules, Allen-Bradley offers a wide range of power
supplies with input voltages from 120V ac to 220V ac or 240V dc that
supply 8 to 24 amps in various configurations. We also supply redundant
power supplies for added security. For more information, see your
Allen-Bradley representative.
AB
20
For 1746 I/O modules, Allen-Bradley offers three different power
supplies, two ac and one 24V dc. You can configure the ac supplies to
operate using 120 or 240V ac. For more information, see your
Allen-Bradley representative.
System Overview
Processor Options
Processor Options
EEPROM Module Memory
Expand System Fault Tolerance
In addition to the base processors, PLC-5 processors offer many options.
This section describes these options.
You can back up memory by using EEPROM modules that give you
alternative storage for your program files. Four sizes are available: 16, 32,
64, and 100K words.
You can expand system fault tolerance by using a backup communication
module. Backup communication modules provide high-speed
communication and switchover to a secondary processor system when a
fault or power failure occurs in the primary PLC-5 system.
Backup communication modules back up two DH+/RIO ports. Backup
expander modules are available to back up an additional two DH+/RIO
ports, or four DH+/RIO ports total.
Coprocessor Programming Flexibility
CPU
COMM0
COMM1
With a control coprocessor, you can expand the capability of your PLC-5
system to run programs in C, BASIC, and assembler languages in a
real-time, multitasking operating system environment. These programs run
independently of PLC-5 control logic but have access to PLC-5 memory.
The control coprocessor performs a wide range of functions including:
complex math or application-specific algorithms
BATTERY
alternate control programming with third-party (PSP) programming
packages such as fuzzyTech’sR fuzzy logic or Event Technology’s
function block programming with GELLOR
memory-intensive production scheduling or data logging/trending
high-speed search and compare of very large files or look-up tables
protocol conversion for interfacing a PLC processor with a variety
of field devices
The industrially-hardened module fits in a 1771 chassis and offers direct
and standard I/O communication with PLC-5 processors. With an optional
expander module, you gain two additional serial communication ports, a
keyswitch for reinitializing the control coprocessor without cycling power,
and a 4-digit alphanumeric display for diagnostic reporting.
21
1785 Enhanced PLC5 Processors System Overview
Integrating the System
Integrating the System
Rockwell Software Inc. (RSI) offers numerous products to ease the
integration of your PLC-5 system into new or existing architectures. These
products include the following.
RSView Man/Machine
Interface Software
RSView32t leverages open technologies within the Microsoft Windows NTt and
Windows 95 platforms such as ODBC, OLE, and DDE. It provides leading edge productivity
enhancing tools by allowing changes while online with field equipment. For example, RSView32
allows runtime changes to graphic displays, tag addresses, node addresses, as well as PLC
network and device driver configuration adjustments. RSView32's graphics offer the flexibility of
integrating ActiveX controls and OLE objects such as Microsoft Excel spreadsheets or Microsoft
Word documents along with its own powerful graphical editing tools and libraries. RSView32
takes advantage of the Microsoft Windows NT multitasking environment with its full featured
MultiModel Data Logger, Trending, Alarming and Event triggering components to help you
define your monitoring and supervisory control needs.
personal computer
RSView with Windows NT or 95
Ethernet
Interface
Module
PLC5 processor
with Ethernet
Interface Module
DH+ network
Ethernet
Gateway
PLC5/11 processor
22
PLC5/20 processor
PLC5/20E
processor
PLC5/40E or
5/80E processor
T70 running
RSView
software
DH+ network
PLC5/40 processor
PLC5/80 processor
SLC 5/04
1785 Enhanced PLC5 Processors System Overview
Integrating the System
INTERCHANGE Software on an Ethernet Network
Ethernet network
Ethernet network
host application
program
Host
INTERCHANGE
Software
DH+ network
1785 PLC5
processor
RM
Ethernet
Gateway
VAX computer, HP 9000 computer, or
IBM RS 6000
PLC5/250
processor
PLC3
processor
RS
PLC5/250
processor
DH network
PLC2 processor
PLC5/20E
PLC5/40E or
5/80E processor processor
Ethernet
Interface (EI)
PLC3/10 processor
INTERCHANGEt software is an Application Programming Interface (API) that simplifies communication between a variety
of host computer operating systems and AllenBradley processors. You can use INTERCHANGE software when you need
to share data between plant floor and manufacturing systems.
With INTERCHANGE software on a host computer, you can interface directly with PLC5 processors over DH, DH+ and
Ethernet links. You do this by including INTERCHANGE software function calls in your C application programs.
In addition, with the INTERCHANGE software Dynamic Data Exchange (DDE) option, you can directly access data in
PLC5 processors to accomplish processtoprocess communication. The DDE option complies fully with the Dynamic Data
Exchange Management Library, the set of function calls defined by Microsoft for DDE communication, and is compatible
with both the KT and Ethernet versions of INTERCHANGE software.
23
1785 Enhanced PLC5 Processors System Overview
Open Architecture
Open Architecture
Allen-Bradley offers many control and communication media products that
help you to integrate various plant operations. These products work with
other vendors’ products to provide the plant-wide solutions that meet your
control system and business needs. These products include SCADA,
Ethernet, ControlNet, and DeviceNet.
Use AllenBradley SCADA Systems in a Variety of Applications
SCADA is an acronym for Supervisory Control and Data Acquisition. SCADA systems
let you monitor and control various remote functions and processes using serial
communication links between master and remote locations.
You can use SCADA in a variety of applications; for example, you could:
monitor and record the physical properties of the oil flowing through a pipeline
. in the Alaskan tundra, using only a few remote points
automatically retrieve or store parts within a factory using radio or powerline modems
monitor and pump the water supply for a city or small town
monitor and control offshore oil or gaspumping platforms from the landbased refinery.
Integrate the data you gather into the overall process for producing and shipping the
final product.
AllenBradley SCADA Systems are Flexible
SCADA Systems
or
or
You can use AllenBradley master and remote stations
with products supplied by other vendors to communicate
with other protocols, such as:
DH+
Ethernet
RS232 interface
Master Station
RS232
RS232
Modbust
TeledyneBrown Control Applications (CA)
RS232
You can also use data communication equipment
supplied by other vendors with AllenBradley SCADA
system components to connect to a variety of
communication media, such as:
Modem
Modem
Modem
Remote Station
Remote Station
Pump Station
Gas Metering Station
Aerator
Deck
Clarifying
Deck
Clarifying
Deck
Modem
Remote Station
Pump Station
24
telephone
radio
power lines
And when you use PLC5 processors in your SCADA
application, you can choose from six available processor
memory sizes to fill your master or remote station
requirements. PLC-5 processors provide builtin support
for serial communication links as well as Ethernet
connectivity that uses standard TCP/IP protocol, when
you need it. For more information about SCADA system
solutions, see publication AG6.5.8.
For more
information...
Modem
Remote Station
Waste Treatment Plant
20030
1785 Enhanced PLC5 Processors System Overview
Open Architecture
Ethernet Network
A Wide Open Network
Ethernet is a local area network with a baseband communication rate of 10M bit/s
designed for the highspeed exchange of information between computers and related
devices. AllenBradley takes a systemic approach to the introduction of products having
Ethernet TCP/IP connectivity so that all have the necessary features and functions to
interoperate and all can be managed as a uniform network.
The figure shows an Ethernet system where an HP 9000 , VAX computer, or
personal computer (PC) interfaces with AllenBradley PLC5 processors, sharing and
passing information. Using Ethernet, all facets of your operation can communicate with
each other.
The Possibilities are Almost Limitless
For more
information...
personal
computer
WINDOWS
With an Ethernet network, you have nearlimitless networking possibilities because
you can maximize communication between the great variety of equipment available
from many vendors. Ethernet also provides easy access to printers and file servers
so you can access devices previously out of your reach" and share expensive
resources. For more information about Ethernet system solutions, see Integrating
AllenBradley Products on an Ethernet TCP/IP Network, publication 17852.31.
PLC5/20E
processor
HP 9000
or VAX
computer
PLC5 processor
with Ethernet
Interface Module
Ethernet
Ethernet
Gateway
1785 PLC5
processor
Data Highway Plus
25
1785 Enhanced PLC5 Processors System Overview
Open Architecture
ControlNet
The ControlNet network is a highspeed deterministic network used for the transmission of
timecritical application information. Used within the AllenBradley architecture, it provides
realtime control and messaging services for peertopeer communication. As a highspeed
link between programmable controller and I/O devices, it combines the capabilities of
existing Remote I/O and Data Highway Plus links. A variety of devices can be connected
to a ControlNet network, including personal computers, programmable controllers, operator
interfaces, and other devices with ControlNet connections.
IBMPC, XT, AT or
compatible computer
running Rockwell
programming software
1784KTCX
1785ENET
ControlNet
PLC5/40C processor
PLC5/40C processor
Remote I/O link
FLEX I/O adapter
1791
I/O block
26
PanelView 1200
Operator Terminal
1785 Enhanced PLC5 Processors System Overview
Open Architecture
DeviceNet
An Open Device Network Standard
DeviceNet is an open, lowlevel communication link that provides connections between
simple industrial devices (sensors, actuators) and higherlevel devices (processors). This
open network offers a level of interoperability between like devices from multiple vendors.
Flexible, Compatible Communication Between Simple Devices
DeviceNet also accommodates devices with vendorspecific, valueadd options.
DeviceNet provides:
D
interoperability: simple devices from multiple vendors that meet DeviceNet
standards are interchangeable, giving you flexibility and choice
D
a common network: an open network provides common, enduser solutions,
and reduces the need to support a wide variety of device networks
D
insurance of a proven standard: Because DeviceNet is based on the proven
Controller Area Network (CAN) technology industrywide understanding and
acceptance grows
D
assistance in decreasing maintenance costs: you can remove and replace
devices without disrupting other devices on the network
D
cost effective wiring: networked device installation is more costeffective than
traditional I/O wiring in many applications
PLC5 processor
DeviceNet
Other
Devices
Sensor
Motor
Starter
Device Configuration
Pushbutton
Cluster
Allen-Bradley
SMC
Input/Output
Devices
Motor
Controller
Drive
Bar Code Scanner
20055M
27
1785 Enhanced PLC5 Processors System Overview
Programming Software
Using the Software
PLC5 A.I. Series Programming Software
Rockwell Software’s PLC-5 A.I. Series is an easy-to-use, menu and
function-key driven software package for programming the Allen-Bradley
PLC-5 family of processors. Rockwell Software’s features enable the
beginner to quickly become proficient in ladder logic development and
documentation. The advanced user will find Rockwell Software’s
powerful editing and diagnostic tools to be great time savers during ladder
program development and troubleshooting.
Online and Offline modules offer complete programming, documentation,
and reporting, as well as upload/download capabilities. The help system
assists the user with unique features of the software, as well as specific
information on the PLC’s instruction set. For more information on specific
features, please see the overview of the complete A.I. Series.
Rockwell Software also offers an A.I. Series Processor Emulation Module.
Processor Emulation provides a convenient means for testing and
debugging ladder logic offline on your computer. Using emulation, you
can troubleshoot your program one scan at a time and add breakpoints to
trap unexpected conditions. See A.I. Series Processor Emulation for
further information.
A.I. Series Features
28
D
crossreferencing: displays crossreference information from the data table
D
reporting: offline and online data table usage reports
D
memory: extended memory support
D
partial download: select specific program or data table files to be downloaded
instead of a complete ladder program
D
sequencer display: screens and reports
D
configurable screen size: for custom data display
D
programming: SFC and Structured Text
D
program compare: ladder and data table programs
D
diagnostics: DH/DH+ and DH485
D
keyboard macros
D
security
D
DOS file utilities
1785 Enhanced PLC5 Processors System Overview
Support Services
AllenBradley Support
In today’s competitive world, when you buy a product, you expect that
product to meet your needs. You also expect the manufacturer of that
product to back it up with the kind of customer service and product support
that prove you made a wise purchase.
As the people who design, engineer, and manufacture your industrial
automation equipment, we at Allen-Bradley have a vested interest in your
complete satisfaction with our product and services.
We offer worldwide support services, with over 75 sales and support
offices, 512 authorized distributors, and 260 authorized systems
integrators located throughout the United States alone, plus
Allen-Bradley representatives in every major country in
the world.
We’re global because we’re local where you are.
In addition, Allen-Bradley supports its software with phone
support, warranties, and support extension programs. Remote
Software Support (RSS) is available for the DOS platform
version of 6200 software. With RSS, the Allen-Bradley System
Support Center can connect to your computer via modem to help
troubleshoot your system.
Call your Allen-Bradley representative for:
AB
sales and order support
technical product training
warranty support
support service agreements
29
1785 Enhanced PLC5 Processors System Overview
For More Information ...
For More Information ...
30
If you want more detailed information, your Allen-Bradley representative
is always available to take your call. In addition, the following publications
are available as part of the PLC-5 documentation library.
Publication #
Title
178510.4
Enhanced PLC5 Programmable Controller Quick Start
178510.5
Ethernet PLC5 Programmable Controller Quick Start
17856.5.12
Enhanced and Ethernet PLC5 Programmable Controllers User Manual
17856.1
PLC5 Programmable Controllers Instruction Set Reference
17857.1
PLC5 Programmable Controllers Quick Reference
17852.35
Classic PLC5 Programmable Controller Product Data
17856.6.1
Classic PLC5 Family Programmable Controller Hardware Installation Manual
17856.2.1
Classic PLC5 Programmable Controllers User Manual
1785 Enhanced PLC5 Processors System Overview
What To Do Next
What to Do Next
AB
We suggest that you call your Allen-Bradley representative after working
through the guidelines that follow in the back of this book. Your
representative can answer your questions, provide more information, and
help you to specify a PLC-5 system that suits your unique needs.
PLC and PLC-5 are registered trademarks of Allen-Bradley Company, Inc.
ControlView, Data Highway Plus, DH+, INTERCHANGE, PanelView, PowerText, PLC-5/11, PLC-5/15, PLC-5/20,
PLC-5/20E, PLC-5/25, PLC-5/30, PLC-5/40, PLC-5/40E, PLC-5/40L, PLC/60, PLC-5/60L, PLC-5/80, and PLC-5/80E are
trademarks of Allen-Bradley Company, Inc.
Ethernet is a registered trademark of Digital Equipment Corporation, Intel and Xerox Corporation.
Fuzzy logic is a registered trademark of fuzzyTech, Inc.
GELLO is a registered trademark of Event Technology, Inc.
DEC, DECnet, MicroVAX, and VAX are registered trademarks of Digital Equipment Corporation.
Hewlett-Packard is a registered trademark of Hewlett-Packard Company.
HP 9000 and HP-UX are trademarks of Hewlett-Packard Company.
i386, i486, and Intel are trademarks of Intel Corporation.
IBM and PC-DOS are registered trademarks of International Business Machines Corporation.
Modbus is a trademark of Modicon, Inc.
MS-DOS, Windows95, and WindowsNT are registered trademarks of Microsoft.
Novell is a registered trademarks of Novell, Inc.
PC/TCP is a registered trademarks of FTP Software, Inc.
31
1785 Enhnaced PLC5 Processors System Overview
Preparing to Layout a PLC5 System
Preparing to Layout a
PLC5 System
Use these guidelines to understand your requirements and to begin to lay
out your PLC-5 system. When you finish, please call your Allen-Bradley
representative with any questions or for specific ordering and pricing
information.
When you select:
you should consider:
a processor
■
I/O requirements
How much I/O do you need to control your process?
■
Record this information.
memory requirements
How much memory do you need to control your process?
■
Record this information.
communication requirements
What type of communication access do you need in your process?
Record this information.
I/O
an I/O chassis
the electrical requirements of your field devices
■ 1771 I/O offers a breadth of choices and has the largest
installed base
■ 1791 I/O offers the lowestpriced distributed I/O in one
small package
■ 1746 I/O offers many interface options and is costeffective due to
its modular hardware design
■ 1794 I/O offers the lowest installed cost due to reduced
wiring needs
■
■
■
a power supply
■
■
■
■
■
the type of I/O you're using
If you're using 1771 or 1746 I/O modules, you need to select
a chassis. Four sizes are available.
I/O slots dedicated to power supply modules, communication
modules, or other intelligent I/O modules
Allow space in the chassis for these modules.
integral power supply and remote I/O adapter
If you want these options, two types are available.
input voltage for power supply
total backplane current draw for I/O modules
what the chassis will contain
You will need to add 3.3 Amps to the total backplane current draw if
the chassis will contain a PLC5 processor; add 1.2 Amps if the
chassis will contain either a remote I/O 1771AS or ASB module or
a 1771ALX extendedlocal I/O adapter module.
backplane current draw for future I/O modules
If you leave room in your chassis for future expansion, you must
consider the backplane current draw for those modules.
You will need to add the total current draw for expansion modules to
the previous total.
available space for the power supply
You will need to determine whether the available space for the
chassis is in the chassis or mounted external to the chassis.
Record your input voltage requirements and the total backplane
current draw to select a power supply.
32
1785 Enhanced PLC5 Processors System Overview
Preparing to Layout a PLC5 System
When you select:
you should consider:
processor options
■
■
■
■
■
■
■
system integration products
■
programming software
■
■
how to back up processor memory
If you want to back up processor memory right at the processor,
consider an EEPROM module memory card.
what you want to happen when a fault or power failure occurs
If you want to switch to a secondary processor if this happens,
consider a backup communication module.
programming in C, BASIC, or Assembler languages
If you want to program in these languages, consider a control
coprocessor module.
how to easily perform:
-complex math or applicationspecific algorithms
-alternate control programming (fuzzy logic or GELLO)
-memoryintensive production scheduling
-datalogging/trending
-highspeed search and compare of very large files or
lookup tables
-protocol conversions
If you want to perform any of these functions, consider a control
coprocessor module.
additional serial ports for the control coprocessor module
keyswitch for reinitializing without cycling power
4digit alphanumeric display for diagnostic reporting
If you want these options, choose an optional expander module for
the control coprocessor.
the specific needs of your application. Your AllenBradley
representative can offer suggestions or information.
platform
media type
33
Index
Symbols
**Empty**, 31
Numbers
1771IR/B, RTD Input Module, 3wire RTDs,
15
1771IXHR, High Resolution
Thermocouple/milliVolt Input Module, 8
T/C type B, E, J, K, R, S, T, 15
1771OFE1, Analog Output Module, 12 bit,
4 differential, voltage outputs 1000V
isolation, 15
1771OFE2, Analog Output Module, 12 bit,
4 differential, 1000V isolation, 420mA,
15
1771OFE3, Analog Output Module, 12 bit,
4 differential, 1000V isolation, 050mA,
15
AllenBradley, a Rockwell Automation Business, has been helping its customers improve
productivity and quality for more than 90 years. We design, manufacture and support a broad
range of automation products worldwide. They include logic processors, power and motion
control devices, operator interfaces, sensors and a variety of software. Rockwell is one of the
worlds leading technology companies.
Worldwide representation.
Argentina • Australia • Austria • Bahrain • Belgium • Brazil • Bulgaria • Canada • Chile • China, PRC • Colombia • Costa Rica • Croatia • Cyprus • Czech Republic •
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AllenBradley Headquarters, 1201 South Second Street, Milwaukee, WI 53204 USA, Tel: (1) 414 3822000 Fax: (1) 414 3824444
Publication 17852.36 January 1997
Supercedes Publication 17852.36 September 1995
PN 95512826
Copyright 1997 AllenBradley Company, Inc. Printed in USA
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