Allen-Bradley 2080-LC20-20QWB User manual

User Manual
Micro820 Programmable Controllers
Catalog Numbers 2080-LC20-20QWB, 2080-LC20-20QBB, 2080-LC20-20AWB, 2080-LC20-20QWBR, 2080-
LC20-20QBBR, 2080-LC20-20AWBR

Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety
Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some
important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference,
and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from
the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Allen-Bradley, Rockwell Software, Rockwell Automation, Micro800, Micro820, Micro830, Micro850, Connected Components Workbench, and TechConnect are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death,
property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the
consequence
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that
dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that
surfaces may reach dangerous temperatures.
IMPORTANT
Identifies information that is critical for successful application and understanding of the product.

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 iii
Preface
Read this preface to familiarize yourself with the rest of the manual. It provides
information concerning:
•who should use this manual
•the purpose of this manual
•related documentation
•supporting information for Micro800™
Who Should Use this
Manual
Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use Micro800 controllers.
You should have a basic understanding of electrical circuitry and familiarity with
relay logic. If you do not, obtain the proper training before using this product.
Purpose of this Manual
This manual is a reference guide for Micro820 controllers. It describes the
procedures you use to install, wire, and troubleshoot your controller. This
manual:
•explains how to install and wire your controllers
•gives you an overview of the Micro800 controller system
Refer to the Online Help provided with Connected Components Workbench™
software for more information on programming your Micro800 controller.
Additional Resources
These documents contain additional information concerning related Rockwell
Automation products.
Resource Description
Micro800 Plug-in Modules 2080-UM004 Information on features, configuration,
installation, wiring, and specifications for the
Micro800 plug-in modules.
Micro800 Programmable Controller External AC
Power Supply Installation Instructions
2080-IN001
Information on mounting and wiring the optional
external power supply.
Micro820 Programmable Controllers Installation
Instructions, 2080-IN009 Information on installing, mounting, and wiring
the Micro820 controller.
Micro800 Remote LCD Installation Instructions,
2080-IN010 Information on installing, mounting, and wiring
the Micro800 Remote LCD module.
Micro800 RS232/485 Isolated Serial Port Plug-in
Module Wiring Diagrams 2080-WD002 Information on mounting and wiring the
Micro800 RS232/485 Isolated Serial Port Plug-in
Module.
Micro800 Non-isolated Unipolar Analog Input
Plug-in Module Wiring Diagrams 2080-WD003 Information on mounting and wiring the Micro800 Non-isolated Unipolar Analog Input
Plug-in Module.
Micro800 Non-isolated Unipolar Analog Output
Plug-in Module Wiring Diagrams 2080-WD004 Information on mounting and wiring the
Micro800 Non-isolated Unipolar Analog Output
Plug-in Module.
Micro800 Non-isolated RTD Plug-in Module
Wiring Diagrams 2080-WD005 Information on mounting and wiring the
Micro800 Non-isolated RTD Plug-in Module.

iv Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Preface
You can view or download publications at http://www.rockwellautomation.com/
literature/. To order paper copies of technical documentation, contact your local
Rockwell Automation distributor or sales representative.
You can download the latest version of Connected Components Workbench for
your Micro800 at the URL below.
http://ab.rockwellautomation.com/Programmable-Controllers/Connected-
Components-Workbench-Software.
Micro800 Non-isolated Thermocouple Plug-in
Module Wiring Diagrams 2080-WD006 Information on mounting and wiring the Micro800 Non-isolated Thermocouple Plug-in
Module.
Micro800 Memory Backup and High Accuracy
RTC Plug-In Module Wiring Diagrams
2080-WD007
Information on mounting and wiring the
Micro800 Memory Backup and High Accuracy
RTC Plug-In Module.
Micro800 6-Channel Trimpot Analog Input Plug-In
Module Wiring Diagrams 2080-WD008 Information on mounting and wiring the Micro800 6-Channel Trimpot Analog Input Plug-In
Module.
Micro800 Digital Relay Output Plug-in Module
Wiring Diagrams 2080-WD010 Information on mounting and wiring the
Micro800 Digital Relay Output Plug-in Module.
Micro800 Digital Input, Output, and Combination
Plug-in Modules Wiring Diagrams 2080-WD011 Information on mounting and wiring the Micro800 Digital Input, Output, and Combination
Plug-in Modules.
Micro800 High Speed Counter Plug-in Module,
2080-WD012 Information on mounting and wiring the High Speed Counter Plug-in module.
Micro800 DeviceNet Plug-in Module,
2080-WD013 Information on mounting and wiring the
Micro800 DeviceNet plug-in module.
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website, http://
www.rockwellautomation.com/products/
certification/
Provides declarations of conformity, certificates,
and other certification details.
Application Considerations for Solid-State
Controls SGI-1.1 A description of important differences between
solid-state programmable controller products
and hard-wired electromechanical devices.
National Electrical Code - Published by the
National Fire Protection Association of Boston,
MA.
An article on wire sizes and types for grounding
electrical equipment.
Allen-Bradley Industrial Automation Glossary
AG-7.1 A glossary of industrial automation terms and abbreviations.
Resource Description

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 v
Table of Contents
Preface Who Should Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Chapter 1
Hardware Overview
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Chapter 2
About Your Controller
Programming Software for Micro800 Controllers. . . . . . . . . . . . . . . . . . . . . 7
Using Run Mode Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Agency Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Preventing Excessive Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Master Control Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chapter 3
Install Your Controller
Controller Mounting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connect the Controller to an EtherNet/IP Network. . . . . . . . . . . . . . . . 25
Install the microSD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Install the 2080-REMLCD Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 4
Wire Your Controller
Wiring Requirements and Recommendation . . . . . . . . . . . . . . . . . . . . . . . 29
Use Surge Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Grounding the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Controller I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Wiring Analog Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Chapter 5
Communication Connections
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Supported Communication Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
CIP Communications Pass-thru. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Use Modems with Micro800 Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Configure Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Configure Ethernet Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
OPC Support Using RSLinx Enterprise . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

vi Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Table of Contents
Chapter 6
Program Execution in Micro800
Overview of Program Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Controller Load and Performance Considerations . . . . . . . . . . . . . . . . . . 62
Power Up and First Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Memory Allocation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Guidelines and Limitations for Advanced Users. . . . . . . . . . . . . . . . . . . . . 64
Chapter 7
Controller Security
Exclusive Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Password Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Work with a Locked Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Configure Controller Password. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Recover from a Lost Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Chapter 8
Using the Micro800 Remote LCD
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
USB Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Text Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Backup and Restore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Hardware Features, Installation, and Specifications . . . . . . . . . . . . . . . . . 81
Chapter 9
Using microSD Cards
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Project Backup and Restore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Datalog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Recipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Quickstart Projects for Datalog and Recipe Function Blocks . . . . . . . . . 98
Appendix A
Specifications
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Appendix B
Troubleshooting
Status Indicators on the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Controller Error Recovery Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Calling Rockwell Automation for Assistance. . . . . . . . . . . . . . . . . . . . . . . 131

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 vii
Chapter 1
Appendix C
Quickstarts
Flash Upgrade Your Micro800 Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . 133
Establish Communications between RSLinx and a Micro820 Controller
through USB Port on
2080-REMLCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Configure Controller Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Forcing I/Os. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Using Run Mode Change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Appendix D
IPID Function Block
How to Autotune . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Troubleshooting an Autotune Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
PID Application Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Appendix E
Modbus Mapping for Micro800
Modbus Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Index

viii Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Table of Contents
Notes:

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 1
Chapter 1
Hardware Overview
This chapter provides an overview of the Micro820 hardware features. It has the
following topics:
Hardware Features
Micro820 controllers are 20-point economical brick style controllers with
embedded inputs and outputs. These controllers can accommodate up to two
plug-in modules and can connect to a remote LCD (2080-REMLCD) for
configuring. The Micro820 controller also has a microSD™ card slot for project
backup and restore, and datalog and recipe.
Topic Page
Hardware Features 1
Embedded microSD (Micro Secure Digital) Card Slot 3
Embedded RS232/RS485 Serial Port Combo 3
Embedded Ethernet Support 4
IMPORTANT
The Micro820 controller supports all Micro800 plug-in modules, except
for the 2080-MEMBAK-RTC.
For more information, see Micro800 Plug-in Modules User, publication
2080-UM004.

2Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Chapter 1 Hardware Overview
For information on the REMLCD module, see Using the Micro800 Remote
LCD on page 73.
The controller also accommodates any class 2 rated 24V DC output power
supply that meets minimum specifications such as the optional Micro800 power
supply.
Micro820 Controllers
Status Indicators
See Troubleshooting on page 123 for descriptions of status indicator operation.
46206
Status indicators
RS232/RS485 non-isolated
combo serial ports
Removable/fixed terminal blocks
Power supply
RJ-45 Ethernet
connector port
microSD (Micro
Secure Digital)
card slot
40-pin high-speed plug-in
connector slot
Removable/fixed terminal blocks
Plug-in latch
Mounting screw hole
Optional power supply slot
Mounting feet
DIN rail mounting latch
ATTENTION: Removable terminal blocks are available on catalog
numbers that end in R (for example, 2080-LC20-20QBBR). Fixed terminal
blocks are available on catalog numbers that do not end in R (for example,
2080-LC20-20QBB).
Input status
Run status Fault status
Force status Comm status
ENET status SD status
Output status
46207

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 3
Hardware Overview Chapter 1
Inputs and Outputs
Embedded microSD (Micro Secure Digital) Card Slot
Micro820 controllers support microSD cards through an embedded microSD
card slot. It supports Class 6 and 10 SDSC and SDHC microSD cards, with
FAT32/16 formats, 32 GB maximum size. Industrial grade cards such as Swissbit
S-200u/S300u are recommended. The microSD file system supports only one file
partition. Class 4 cards are not supported.
The microSD card is primarily used for project backup and restore, as well as
datalog and recipe functions. It can also be used to configure powerup settings
(such as controller mode, IP address, and so on) through an optional
ConfigMeFirst.txt file.
For more information, see Using microSD Cards on page 83.
To help you troubleshoot microSD card-related errors, see Troubleshooting on
page 123.
Embedded RS232/RS485 Serial Port Combo
The Micro820 controller supports an embedded non-isolated RS232/RS485
combo communications port. Only one port (RS232 or RS485) can work at any
given time. The baud rate of this port supports up to 38.4 K.
The communication port uses a 6-pin 3.5 mm terminal block with pin definition
shown in the following table.
Number and Types of Inputs/Outputs for Micro820 Controllers
Controller
Family
Catalogs Inputs Outputs Analog Out
0…10V DC
Analog In
0…10V (shared
with DC In)
PWM
Support
120V AC 120 /
240V AC
24V DC Relay 24V DC
Source
24V DC
Sink
Micro820 2080-LC20-20QBB – – 12 7 – 1 4 1
2080-LC20-20QWB – – 12 7 – – 1 4 –
2080-LC20-20AWB 8 – 4 7 – – 1 4 –
2080-LC20-20QBBR – – 12 – 7 – 1 4 1
2080-LC20-20QWBR – – 12 7 – – 1 4 –
2080-LC20-20AWBR 8 – 4 7 – 1 4 –
IMPORTANT
Serial port cables should not exceed 3 m length.

4Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Chapter 1 Hardware Overview
The communication port (both RS232 and RS485) are non-isolated. The signal
ground of the port is not isolated to the logic ground of the controller.
The RS232 port supports connection to the Micro800 Remote LCD module
(2080-REMLCD).
Embedded Ethernet Support
A 10/100 Base-T Port is available for connection to an Ethernet network through
any standard RJ-45 Ethernet cable.
RS232/RS485 Serial Port Pin Definition
Pin Definition RS485
Example RS232 Example
1 RS485+ RS485+ (not used)
2 RS485- RS485- (not used)
3 GND GND GND
4 RS232 input (receiver) (not used) RxD
5 RS232 output (driver) (not used) TxD
6 GND GND GND
REMLCD to Micro820 Serial Port Terminal Block Wiring
REMLCD Serial Port
Terminal Block Micro820 Serial Port Terminal Block
Signal Pin
number Pin number Signal
RS232 TX 1 <--------> 4 RX RS232
RS232 RX 2 <--------> 5 TX RS232
RS232 G 3 <--------> 6 G RS232
D-
D+ G
Rx
Tx
123456
G
RJ-45 connector
RJ-45 Ethernet Port Pin Mapping
Contact
Number Signal Direction Primary Function
1 TX+ OUT Transmit data +
2 TX- OUT Transmit data -
3 RX+ IN Receive data +
4–––
5–––
6 RX- IN Receive data -
7–––
8–––
46210
1
8

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 5
Hardware Overview Chapter 1
Ethernet port pin-to-pin connection
See Troubleshooting on page 123 for descriptions of ENET status indicator.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
white-orange
orange
white-green
blue
white-blue
green
white-brown
brown
white-orange
orange
white-green
blue
white-blue
green
white-brown
brown
46223

6Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Chapter 1 Hardware Overview
Notes:

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 7
Chapter 2
About Your Controller
Programming Software for
Micro800 Controllers
Connected Components Workbench is a set of collaborative tools supporting
Micro800 controllers. It is based on Rockwell Automation and Microsoft Visual
Studio technology and offers controller programming, device configuration and
integration with HMI editor. Use this software to program your controllers,
configure your devices and design your operator interface applications.
Connected Components Workbench provides a choice of IEC 61131-3
programming languages (ladder diagram, function block diagram, structured
text) with user defined function block support that optimizes machine control.
Obtain Connected Components Workbench
A free download is available at:
http://ab.rockwellautomation.com/Programmable-Controllers/Connected-
Components-Workbench-Software
Use Connected Components Workbench
To help you program your controller through the Connected Components
Workbench software, you can refer to the Connected Components Workbench
Online Help (it comes with the software).
Using Run Mode Change
Run Mode Change (RMC) is a productivity enhancement feature introduced in
Release 8 for Micro820/Mico830/Micro850 controllers. It saves the user time by
allowing logic modifications to a running project without going to remote
program mode and without disconnecting from the controller. It requires the
Connected Components Workbench Developer Edition release 8 software to use
this feature.
IMPORTANT
Micro820/Micro830/Micro850 controller firmware revision 8.0 or higher
is also required to use Run Mode Change.

8Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Chapter 2 About Your Controller
RMC is useful when the user is developing a project by incrementally adding
small changes to the logic and immediately wants to see the effects of the changes
on the machine. With RMC, since the controller stays in remote run mode, the
controller logic and machine actuators will not have to constantly reinitialize,
which can occur if the controller is switched to remote program mode (for
example, first scan bit is checked in program logic to clear outputs).
When user is editing, building, and downloading a project without using RMC, a
full build of the entire controller project is performed and also a full download of
the project is performed. During RMC an incremental build is performed and
only incremental changes are downloaded to the controller.
RMC is performed incrementally at the end of every program scan in order to
prevent a large delay in the program scan. This adds up to an additional 12 ms to
the scan time. For example, if the program scan is normally 10 ms, it may increase
to 22 ms during RMC until the update is finished. Similarly user interrupts may
be delayed.
A new global variable SYSVA_PROJ_INCOMPLETE has been added to
indicate when Run Mode Changes are being made. This can be used to notify
personnel on the HMI that there are uncommitted changes in the controller.
When you perform a Test Logic Change, the value of the variable is changed from
zero to one. After you choose to accept or undo the changes, the value of the
variable is reset to zero.
Example of the Benefits of Using RMC – 20% Reduction in Download Time
Number of
Changes Time to Perform Conventional Download (seconds) Time to Test Logic and Accept Changes (seconds)
1 103 80
5 241 191
10 376 308
Memory size of project used for comparison:
Data = 16704 bytes; Program = 2052 bytes
ATTENTION: Use extreme caution when you use Run Mode Change.
Mistakes can injure personnel and damage equipment. Before using Run
Mode Change:
·assess how machinery will respond to the changes.
·notify all personnel about the changes.
Value of Global Variable – SYSVA_PROJ_INCOMPLETE
Value Description
0 (Default) No uncommitted changes
1 Uncommitted changes present
2 Error occurred during Test Logic Change
(for example, communications loss during Test Logic)

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 9
About Your Controller Chapter 2
Uncommitted Changes
Uncommitted changes are changes made in RMC that have not been accepted or
undone after a Test Logic Change has been performed.
If the controller power loses power while there are uncommitted changes, you
will not be able to re-enter RMC upon reconnection. You can choose to re-
download the project to keep the changes, or upload if the uncommitted changes
are not wanted.
If you choose to upload a project with uncommitted changes from the controller,
you cannot enter RMC until you have done a full download.
RMC Memory
Run Mode Change (RMC) memory is used to store both the logic and user
variable changes made during RMC. The default amount of memory allocated is
2KB and can be increased up to 8KB. However there is still a limit of 2KB for
logic and user variables changes per Test Logic. To adjust the amount of RMC
memory, the controller must be offline. After you have adjusted the amount, you
must build the project and download it to the controller.
Controller Memory Diagnostics Page in Connected Components Workbench
During RMC an incremental build is performed and only incremental changes
are downloaded to the controller until the RMC memory has been filled.
IMPORTANT
When a Test Logic is performed, or undoing changes after the Test Logic
is completed, any active communication instructions will be aborted
while the changes are downloaded to the controller.

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Chapter 2 About Your Controller
RMC Memory Usage Example
If not enough RMC memory is available to make more changes (for example, a
“not enough memory” error message appears during RMC build or Test Logic),
then a full download must be performed to transfer the incremental changes from
the RMC memory to standard user program and data memory.
Transferring Contents in RMC Memory to Controller Memory
The changes that you have made during RMC are stored in RMC memory and
will remain there until you perform a full download (while the controller is
disconnected).
RMC Memory Usage When Performing Full Download Example
However if the controller memory does not have enough space remaining to copy
the contents of the RMC memory as shown below, the operation will fail and a
“not enough memory” error message will appear. Do not use RMC if you are near
the limits of your controller memory.
Controller Memory
(for User Program + Data)
RMC Memory
(Default size = 2KB)
Used memory
Free memory
Used RMC memory
Free RMC memory
1st change and
Test Logic
(Add logic)
2nd change and
Test Logic
(Remove logic)
3rd change and
Test Logic
(Add logic)
Controller Memory
(for User Program + Data)
RMC Memory
(Default size = 2KB)
New used memory
Free memory Free RMC memory
Used RMC memory is copied
to controller memory

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015 11
About Your Controller Chapter 2
Insufficient Controller Memory Example
Limitations of RMC
Take note of the following limitations when using the Run Mode Change (RMC)
feature:
•Configuration changes cannot be made (for example, change filter times).
•Up to 2KB of logic (approximately 150 boolean instructions) and user
variables and can be added for each Test Logic.
•Total memory allocated for RMC (cumulative of all Test Logic Changes)
can be increased from 2KB to 8KB, but the 2KB limit for logic and user
variables per Test Logic remains.
•A total of 20 POU (Program Organizational Units) can be added for each
RMC (for example, if you currently have 5 POU, you can add 20 more for
a total of 25 POU).
•If a User Defined Function Block is modified that changes the local
variables, the local variables will be reinitialized or reset to zero and a
warning message will be shown during the build. If you want to reapply the
initial value, right-click on the UDFB and select Refactor -> Reset Initial
Values of Instances.
•Exchange files cannot be imported when in RMC because it is considered a
configuration change.
•Global variables cannot be deleted or modified in RMC, but can be added.
To delete or modify a global variable, the workbench must be disconnected
from the controller.
•If you create a global variable in RMC, it will not be shown in the LCD
display.
See Using Run Mode Change on page 150 for an example on how to use this
feature.
WARNING: If you delete the output rung when in Run Mode Change and
accept the changes, the output on the controller will remain ON.
Controller Memory
(for User Program + Data)
RMC Memory
(Default size = 2KB)
Error will occur due to insufficient
controller memory remaining
Free RMC memory
Used memory

12 Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
Chapter 2 About Your Controller
Agency Certifications
•UL Listed Industrial Control Equipment, certified for US and Canada.
UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations,
certified for U.S. and Canada.
•CE marked for all applicable directives
•C-Tick marked for all applicable acts
•KC - Korean Registration of Broadcasting and Communications
Equipment, compliant with: Article 58-2 of Radio Waves Act, Clause 3.
Compliance to European
Union Directives
This product has the CE mark and is approved for installation within the
European Union and EEA regions. It has been designed and tested to meet the
following directives.
EMC Directive
This product is tested to meet Council Directive 2004/108/EC Electromagnetic
Compatibility (EMC) and the following standards, in whole or in part,
documented in a technical construction file:
•EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)
•EN 61131-2; Programmable Controllers (Clause 11)
•EN 61000-6-4
EMC - Part 6-4: Generic Standards - Emission Standard for Industrial
Environments
•EN 61000-6-2
EMC - Part 6-2: Generic Standards - Immunity for Industrial
Environments
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 2006/95/ECLow Voltage, by
applying the safety requirements of EN 61131-2 Programmable Controllers, Part
2 - Equipment Requirements and Tests.
For specific information required by EN 61131-2, see the appropriate sections in
this publication, as well as the following Allen-Bradley publications:
•Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity, publication 1770-4.1.
•Guidelines for Handling Lithium Batteries, publication AG-5.4
•Automation Systems Catalog, publication B115