1756-RN582Q-EN-E, ControlLogix Redundancy System Revision
Contents
1. After you download a project that contains ASCII instructions e g ABL ACB to a pair of redundant controllers the secondary controller may disqualify and fail to synchronize If this occurs turn off both controllers primary and secondary and then turn the controllers back on Controller May Momentarily Drop Its Connection to a Digital 1 0 Module In rare instances if a tap to a 1756 CNB module is disconnected or breaks the primary controller may monetarily drop its connection to a digital 1 0 module The connection automatically re establishes To minimize this use redundant ControlNet media Redundant ControlNet media prevents a loss of communication if a trunkline or tap is severed or disconnected Publication 1756 RN5820 EN E July 2004 10 ControlLogix Redundancy System Revision 11 Restriction Description Communication Loss When Bridging The following combination of modules in a remote chassis could cause a temporary Through a 1756 CNB B or CNBR B communication loss with the chassis Module e 1756 CNB B or CNBR B module e 1756 DHRIO module that is connected to a remote 1 0 network redundant chassis j aie N LICI s 5 N R 5 B M M X E i 1756 CNB B or CNBR B module remote chassis C D N H B other modules R B 0 b i remote 0 On the first switchover after you download a project to2. If you start the Alias Topic Switcher software without access to an activation file the following error occurs 0x80040112 The text for the message depends on your operating system The ControlLogix Redundancy Alias Topic Switcher software works with RSLinx alias topics to maintain communication between your HMI and the primary controller after a switchover e When you use a 1756 ENBT module in a redundant system the module keeps its IP address regardless of which chassis is the primary chassis Only CNB modules swap addresses ENBT modules do not swap IP addresses e In your HMI project each tag must reference an alias topic in RSLinx software This lets RSLinx software re direct communications to the appropriate chassis e The Alias Topic Switcher software automatically determines which chassis is the primary chassis The software then points the alias topic to that chassis Publication 1756 RN5820 EN E July 2004 6 ControlLogix Redundancy System Revision 11 The Alias Topic Switcher software runs as a service It starts automatically when you start your computer and shows up in the tool tray of your desktop ControlLogix Redundancy Alias Topic Switcher ct he a Sy co Ge TE For an example of how to use the Alias Topic Switcher software see the following document UsingEthernet With Redundancy Doc The ControlLogix Redundancy CD contains this document along with the firmware and software for your redundancy
3. system Corrected Anomalies The corrected anomalies are organized by the firmware revision that corrected them ControlLogix5555 Rev 11 72 Anomaly Description Backplane Errors Caused Loss of Errors that occur for certain backplane noise conditions caused the data being received by the Input Data controller to stop flowing into the data table of the controller The controller did not detect when this happened and the connection status and 1 0 LED indicators still indicated that everything was working Lgx00047199 Publication 1756 RN5820 EN E July 2004 Anomaly Non Recoverable Fault When a Disqualified Secondary Controller Becomes a Primary Controller ControlLogix Redundancy System Revision 11 7 ControlLogix5555 Rev 11 71 Description The following sequence of events produced a non recoverable fault solid red OK and RS232 LEDs in the controller 1 Download a project to a disqualified secondary controller 2 Turn off the primary controller 3 Command the disqualified secondary controller to become the primary controller When the controller experiences a non recoverable fault it clears the project from memory Lgx00040144 Simultaneous Power Up Caused the Secondary Chassis to Fail to Synchronize If you turned on the power to both redundant chassis at the same time the secondary chassis might not have synchronized This required you to cycle power to the secondary chassis High Number of Messages M
4. the controller you may temporarily lose communications with these devices The loss of communication occurs on the first switchover after you download the project to the redundant controller e You lose communication with the remote chassis and any devices to which you were bridging via the chassis such as the remote 1 0 modules e During the communication loss the 1 0 modules go to their configured state for a communication fault e The communication loss is temporary Communications restore themselves To prevent this situation use 1756 CNB D or CNBR D modules Publication 1756 RN5820 EN E July 2004 Restriction If the Lowest Node Is a 1756 CNB B or CNBR B Module Removing a Tap or Breaking a Cable Could Stop All Communications over the Network ControlLogix Redundancy System Revision 11 11 Description If the lowest node on a ControlNet network is a 1756 CNB B or CNBR B module all communications over the network could stop if e A tap to the 1756 CNB B or CNBR B module is disconnected or breaks and then is replaced while power is still applied to the 1756 CNB B or CNBR B module If a tap to a 1756 CNB B or CNBR B module becomes disconnected or broken take these actions 1 Turn off the power to the 1756 CNB B or CNBR B module 2 Replace the tap If a communication failure occurs because of a disconnected or broken tap cycle power to each primary controller on the network To prevent this situation us
5. web to assist you in using our products At http support rockwellautomation com you can find technical manuals a knowledge base of FAQs technical and application notes sample code and links to software service packs and a MySupport feature that you can customize to make the best use of these tools For an additional level of technical phone support for installation configuration and troubleshooting we offer TechConnect Support programs For more information contact your local distributor or Rockwell Automation representative or visit http support rockwellautomation com Installation Assistance If you experience a problem with a hardware module within the first 24 hours of installation please review the information that s contained in this manual You can also contact a special Customer Support number for initial help in getting your module up and running United States 1 440 646 3223 Monday Friday 8am 5pm EST Outside United States Please contact your local Rockwell Automation representative for any technical support issues New Product Satisfaction Return Rockwell tests all of our products to ensure that they are fully operational when shipped from the manufacturing facility However if your product is not functioning and needs to be returned United States Contact your distributor You must provide a Customer Support case number see phone number above to obtain one to your distributor in order to complete the re
6. Addressing of an ASCII String You could not download a project that used an indirect address tag in the subscript of an array to a string data type SRM Module Placed in a Slot Configured for Another Module If you placed the left hand side of a 1757 SRM module in a slot that was configured for a CNB module other modules might have faulted when they powered up Switchover Caused a CNB Module to Fail In some instances a switchover might have caused a CNB module to stop communicating solid red OK LED When this occurred the CNB module displayed a message that started with either of the following e ASSERT e FAULT Publication 1756 RN5820 EN E July 2004 8 ControlLogix Redundancy System Revision 11 Anomaly Major Fault During Prescan Description If a major fault occurred during prescan i e change from program mode to run mode a switchover might not have occurred and the secondary controller might have experienced a non recoverable fault solid red OK LED If this occurred you had to manually clear the fault and then cycle power to the secondary chassis CIP Data Table Write Messages Failed In a synchronized system Message MSG instructions that were configured as CIP Data Table Write did not work The instruction did not write the data and its ER bit was set Online Edits Might Have Corrupted the Project in the Secondary Controller If you performed online edits in a synchronized
7. Release Notes ControlLogix Redundancy System Revision 11 Cat No 1756 L55 L55M12 L55M13 L55M14 L55M16 L55M22 L55M23 L55M24 CNB D CNBR D ENBT A 1757 SRM A SRM B ea you have a 1756 L55 controller you must install a memory board For more information see the ControlLogix Controller and Memory Board Installation Instructions publication 1756 IN101 When to Use These Release These release notes correspond to the following module when used in a ControlLogix redundancy system Notes Component Catalog number Revision or later ControlLogix5555 controller 1756 L55Mxx 11 72 ControlNet bridge module 1756 CNB D or CNBR D 5 38 1756 10 100 Mbps EtherNet IP 1756 ENBT A 2 3 Bridge Twisted Pair Media redundancy module 1757 SRM A or SRM B 3 29 Tiina lousea 1756 ENBT module in a redundant controller chassis make sure the catalog revision of the module is greater than or equal to E01 E01 E02 FO1 etc e To determine the catalog revision of a module look at the label on the side of the module or box e Using an older ENBT module will prevent the secondary chassis from synchronizing CAT NO SERIES CAT REV 1756 ENBT A E01 L catalog revision Allen Bradley Ethernet IP 10 100 Mb s ControlLogix COMMUNICATIONS BRIDGE Publication 1756 RN5820 EN E July 2004 2 ControlLogix Redundancy System Revision 11 Compatible Revisions To use this revision update
8. Use ControlLogix Redundancy Alias Topic Switcher Software on page 5 Store a Project in the Nonvolatile Memory of a Secondary Controller The revision lets you store a project to the nonvolatile memory of a secondary controller while the primary controller is actively controlling your system Publication 1756 RN5820 EN E July 2004 ControlLogix Redundancy System Revision 11 5 ControlLogix5555 Rev 11 60 Enhancement Description 1756 L55M12 and L55M22 You can use a 1756 L55M12 or L55M22 controller in a redundant system Controllers Nonvolatile Memory You can store or load a project to the nonvolatile memory of a 1756 L55M22 L55M23 or L55M24 controller For step by step procedures see the Contro Logix Redundancy System User Manual publication 1756 UM523 general enhancements This revision also contains the enhancements that were previously available to non redundant systems via the general releases of Logix revision 10 x and 11 x software and firmware For more information on those enhancements see the following release notes e For revision 10 x enhancements see publication 1756 RN597 e For revision 11 x enhancements see publication 1756 RNO04 Use ControlLogix Redundancy Alias Topic METT T0 vse the ControlLogix Redundancy Alias Topic Switcher Software Switcher software your computer requires an activation file for RSLinx software e The activation file lets you perform DDE OPC communications e
9. and choose Shutdown RSLinx 3 Install the RSLinx hot fix To get the hot fix a Go to http support rockwellautomation com b Click Knowledgebase c Scroll down and click the Tech Note ID button d Type the following Tech Note ID R13441518 e Click Find Update Firmware ATTENTION 1 Update the SRM module firmware It takes several minutes to update a 1757 SRM A or SRM B module Do not interrupt the process Make sure you wait until the SRM module displays REV 3 29 on its four character display If you interrupt the process the module may become inoperative When you update the module it performs the following sequence e Two downloads ERAS PROG on display twice e Reset to rev 2 20 FLSH UPDT REQD e Two more downloads ERAS PROG on display twice e Second reset before the update is complete If the OK LED on the SRM module is red flashing and the 4 character display is blank then the firmware update has failed Do not cycle the power to the module Leave the power on and update the firmware of the module again 2 Update the CNB module firmware 3 Update the controller firmware Publication 1756 RN5820 EN E July 2004 4 ControlLogix Redundancy System Revision 11 Enhancements Enhancement Local 1756 ENBT modules The enhancements are organized by the firmware revision in which they first appeared ControlLogix5555 Rev 11 71 Description This revision lets you use 1756 ENBT m
10. e a 1756 CNB D or CNBR D module as your lowest node on the network 1756 L55M16 Controllers Have a 3 5M Byte Limit of Tags You cannot download a project that has more than 3 5M bytes of data to a 1756 L55M16 controller For redundancy operations the controller requires enough memory for 2 copies of all data During the download RSLogix 5000 software indicates that the controller is out of memory To stay within the 3 5M byte limit take this precaution e As you create tags periodically download the project If the project successfully downloads then you know you are within the 3 5M byte limit 1756 L55M16 Controllers Guidelines for the Size of Routines You cannot download a project that has very large routines During the download RSLogix 5000 software indicates that the controller is out of memory While online you may be able to create a very large routine but once offline you will be unable to download the project To avoid creating routines that are too large take these precautions e Limit the number of rungs in a routine to less than 2500 Use a series of smaller routines e f you are entering a large number of rungs in a routine do this offline e As you enter rungs periodically download the project If the project successfully downloads then your routines are within limits Publication 1756 RN5820 EN E July 2004 Rockwell Automation Support Rockwell Automation provides technical information on the
11. ight Have Caused Temporary 0 Communication Loss After a Switchover Anomaly SRM Module in Slot 0 In some situations the execution of a large number of Message MSG instructions might have caused a loss of communication with I O modules for several seconds after a switchover During this time outputs would go to their communication fault state Communication eventually re established ControlLogix5555 Rev 11 60 The following anomalies were present in major revision 8 or preliminary minor revisions of major revision 11 Description If you placed a 1757 SRM module in slot 0 it might have caused other modules to fault when they power up Absence of I O Might Have Prevented Synchronization The following combination of events might have prevented the secondary controller from synchronizing both events must have occurred together e The primary controller could not communicate with multiple devices in its 1 0 configuration This occurred if multiple nodes were turned off or disconnected from the ControlNet network e The secondary controller became disqualified for any reason If this occurred the Event log of the SRM Configuration software indicated the following L55 partner not present CNB Module Might Have Displayed PwNS In very rare instances a power cycle to the secondary chassis might have caused the CNB module or modules in the primary chassis to display PwNS on their 4 character display Indirect
12. ing situations either a primary or secondary controller might have experienced a major fault flashing red OK LED due to the watchdog timer of a task e In a synchronized system a failure of a primary CNB module caused the system to switch to the secondary chassis But the controller that was previously the primary controller was left with a task watchdog fault e In a system with a disqualified secondary chassis a failure of a primary CNB module caused the primary controller to experience a task watchdog fault No switchover occurred You had to manually clear the fault from either the controller Controller Failed to Reconnect with a Remote Chassis Under the following combination of circumstances a controller was sometimes unable to re establish connections with a remote chassis both must have occurred e The remote chassis contained a 1756 CNB B or CNBR B module e You disconnected the remote chassis during a switchover Communication with a Device Over RIO Sometimes Failed Publication 1756 RN5820 EN E July 2004 If your system communicated with 1 0 over a universal remote I O network the following could have occurred e f power was cycled to the remote device the controller might not reestablish communication with the device In the Properties dialog box of the remote 1 0 adapter for the device the Status line displayed Shutting Down Restrictions ControlLogix Redundancy System Revision 11 This
13. odules in a redundant chassis for communication with HMI devices e Place an ENBT module in the same slot in each redundant chassis The modules in each redundant chassis must match each other slot by slot e Place up to 2 ENBT modules in each redundant chassis The remaining modules must be either 1756 CNB or CNBR modules for a total of 5 communication modules per redundant chassis ilcle s 5 ININ R redundant 5B B m noother modules chassis a M T X identical modules A e same slot number e same catalog number series and revision e same memory size controller Ci tela _ LIC E S redundant 5 N N R 5 B B M no other modules chassis b M T X Before you use a 1756 ENBT module in a redundant chassis complete the following actions 1 Install RSLinx software revision 2 41 00 Build 10 6 2 Install the ControlLogix Redundancy Alias Topic Switcher software The ControlLogix Redundancy Alias Topic Switcher software maintains communication between your RSView project and the primary controller after a switchover e To install the Alias Topic Switcher software use the ControlLogix Redundancy Alias Topic Switcher Exe file The file is located on the same CD as the firmware for the ENBT module e For more information on the Alias Topic Switcher software see
14. revision contains the following restrictions Tiina 22 redundant system use an EtherNet IP network only for Restriction Online Editing During a Switchover HMI workstation communication For HMI communication establish the communication via OPC topics Do not use an EtherNet IP network for e communication with I O modules e communication between devices via produced consumed tags Description In some instances RSLogix 5000 software may not let you perform additional online edits of a function block diagram This may occur if you edit the function block diagram while online and the system is switching over and synchronizing If this occurs 1 Close and then open RSLogix 5000 software 2 Upload the RSLogix 5000 project from the primary controller 9 Deleting a Task Online If you delete a task while online with the controller the secondary chassis may disqualify and then synchronize Motion Control You cannot use the ControlLogix redundancy system in applications that require motion control l e You cannot use a 1756 MO0Z2AE MO8SE or M16SE module Sequential Function Charts You cannot use the sequential function chart SFC programming language to program your redundancy system If you attempt to download a project with an SFC the download fails and you get the following error message Attribute list error ASCII Instructions May Prevent the Secondary Controller From Synchronizing
15. system you might have corrupted the project in the secondary controller To avoid this situation you had to perform online edits while the secondary chassis was disqualified Creating a Task or Program Online In a synchronized system if you created a task or program while online with the controller the secondary chassis might have disqualified Power Disruptions Cleared Memory If power to the controller turned on and then turned off again in less than a second the controller might have cleared the project from its memory This might have occurred during brownouts or other situations where power to the controller fluctuated for a short duration Secondary Chassis Failed to Synchronize In rare instances the secondary chassis might have failed to synchronize after a switchover and required manual intervention If a Then you had to secondary controller was faulted task Clear the fault watchdog CNB module in either chassis displayed Use the SRM Module Configuration dialog box in ano partner PWNS DSNP condition RSLinx software to synchronize the secondary chassis on its 4 character display ControlNet Trunk Line Break Caused the Secondary Chassis to Disqualify If a ControlNet trunk line broke and was re connected the secondary chassis might have disqualified and then automatically synchronized During this time the primary chassis maintained control of the system Task Watchdog Fault In the follow
16. turn process Outside United States Please contact your local Rockwell Automation representative for return procedure www rockwellautomation com Power Control and Information Solutions Headquarters Americas Rockwell Automation 1201 South Second Street Milwaukee WI 53204 2496 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Europe Middle East Africa Rockwell Automation Vorstlaan Boulevard du Souverain 36 1170 Brussels Belgium Tel 32 2 663 0600 Fax 32 2 663 0640 Asia Pacific Rockwell Automation Level 14 Core F Cyberport 3 100 Cyberport Road Hong Kong Tel 852 2887 4788 Fax 852 2508 1846 Publication 1756 RN5820 EN E July 2004 PN 957928 07 Supersedes Publication 1756 RN582P EN E August 2003 Copyright 2004 Rockwell Automation Inc All rights reserved Printed in the U S A
17. your system as follows Update this software To this revision or later RSLinx 2 41 00 Build 10 6 RSLinx hot fix 2 41 00 Build 10 6 RSLogix 5000 11 11 or a later 11 x revision nota 12 x revision Microsoft Internet Explorer 5 01 RSNetWorx for ControlNet 4 11 RSNetWorx for DeviceNet 4 12 What Is In These Release These release notes provide the following information about the Notes components of the redundancy system For information about See this section On this page order in which to update your system How to Update Your System 3 new features Enhancements 4 how to maintain communication when using a 1756 ENBT module in a Use ControlLogix Redundancy Alias Topic 5 redundant chassis Switcher Software restrictions that no longer apply Corrected Anomalies 6 restrictions to your redundancy system Restrictions 9 For more information on the ControlLogix redundancy system see the ControlLogix Redundancy System User Manual publication 1756 UM523 Publication 1756 RN5820 EN E July 2004 ControlLogix Redundancy System Revision 11 3 How to Update Your System Update your system in the following order Step Details Update RSLinx Software 1 Install the RSLinx software IMPORTANT 2 Shut down RSLinx software Also make sure that the RSLinx icon is not present in the system tray of your computer icons in the right hand side of the Taskbar If the icon is present right click the icon
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