Control Logix Redundancy 1 Main Redundancy Features Optimized

Control. Logix Redundancy 1

Main Redundancy Features • Optimized for availability of control. • Absolutely no user programming required to implement. • Bumpless switchover guaranteed for any outputs controlled by logic in the highest priority task. • Switchover within approximately 100 msec. • Works with standard Logix 5555 controllers and Control. Net Bridges (Series D or higher). • Switchovers are transparent to any devices networked to the redundant controller chassis. • Transparent cross-load of programs from primary to secondary controllers. • On-line workstation configuration/commands/edits to primary are automatically forwarded to secondary. • User can choose to cancel or resume ‘test edits’ at switchover. Rockwell Automation Confidential 2

Building a Typical Redundant System Logix 5555™ RUN A-B Quality Allen-Bradley Control. NET RS 232 BAT A#01 REM Quality Allen-Bradley PRI COM OK Control. NET Start with a standard Control. Logix chassis. Add 1 or more Logix 5555 processors. Add 1 or more Control. Net Bridges (Series D). Add 1 System Redundancy Module. Set up an identical second controller chassis. Cable the SRMs together. Add I/O, operator interfaces, and so forth to the Control. Net network(s). Redundancy Module I/O RS 232 BAT A#01 PRIM OK CHA CHB RUN OK PROG Logix 5555™ RUN A-B PRIM OK CHA CHB RUN Redundancy Module I/O 1. 2. 3. 4. 5. 6. 7. REM OK PRI COM OK PROG Rockwell Automation Confidential 3

Other Redundant Architecture Considerations • Only Logix 5555’s, Control. Net Bridges, and a single System Redundancy Module can be placed in a redundant controller chassis. – All I/O must be remote from the redundant controller chassis. – To connect to other networks, bridge through another Control. Logix chassis. Ethernet Logix A-B Allen-Bradley RUN 5555™I/O BAT OK A# 01 CHA CHB RUN REM Logix A-B Allen-Bradley Control. NET Redundancy Module RS 232 Quality RUN 5555™I/O BAT OK A# 01 CHA CHB RUN REM P R I M PRI COM OK Control. NET Redundancy Module RS 232 Quality OK PROG OK P R I M PRI COM Control. Net OK Rockwell Automation Confidential 4

Logix 5555 Controller • New CPU ASIC – Provides alternative memory parity encoding method so that higher density commercial memory may be used. – New memory change detection algorithms for Redundancy. • New circuitry to support new 1. 5, 3. 5, and 7. 5 Mbyte memory cards. • Increased Performance – Faster Flash-Memory to increase operating system performance. – Movement of Floating Point library to RAM for higher performance (30% faster than L 1). • Hardware changes to support Control. Logix redundancy. • New Real Time Clock (RTC) chip with increased accuracy. • In redundancy, data is buffered in the secondary controller, so twice as much data memory space is required. Rockwell Automation Confidential 5

Control. Net allows transparent switchovers • The 1756 -CNB Series D has added the necessary hardware and firmware changes to support Control. Logix redundancy. • You set the same Control. Net address on the rotary switches of the primary and secondary CNB’s. – The primary CNB will use that address, and the secondary CNB will automatically use the next higher address. • On a switchover, the CNB’s automatically swap addresses. – Any external Control. Net devices will simply continue to communicate with the new primary controller. – Control. Logix redundancy works transparently with 1756 I/O, Flex I/O, drives, operator interfaces, or any other Rockwell or third-party devices which can communicate to a Logix 5555 over Control. Net. Rockwell Automation Confidential 6

System Redundancy Module • The 1757 -SRM provides the high speed data transfers between the primary and secondary chassis and arbitrates primary/secondary chassis status. • Two slot module • Only one SRM per chassis needed. Redundancy Module PRIM PRI COM OK – We will test with up to four Logix 5555 processors per chassis. • A fiber optic cable connects the primary and secondary SRM’s. – 1757 -SRC 1, SRC 3, or SRC 10 (1, 3, or 10 meter lengths) Rockwell Automation Confidential 7

1757 -SRM Configuration • The 1757 -SRM module will be configured from RSLinx instead of RSLogix 5000. – Allows one 1757 -SRM to support multiple Logix 5555 controllers. – Similar to how DHRIO and ENET modules are configured using RSLinx 2. 2. Rockwell Automation Confidential 8

SRM Dialog Module Info Tab Provides identification of the module. Provides the general status of the module. Identifies the current redundancy state of this chassis. This is visible from every tab on the dialog. Rockwell Automation Confidential 9

SRM Dialog Configuration Tab Select when you want a disqualified secondary chassis to automatically attempt synchronization. • Always • Never • Conditional - Auto-synchronization enabled on a Synchronize Secondary command disabled on a Disqualify Secondary command. Lets you specify whether this chassis should be referred to as Chassis A or Chassis B. Select whether programmed messages from a Logix 5555 are allowed to trigger redundancy commands (initiate switchover, disqualify secondary, etc. ) Set the date and time to be used in the SRM event log. Rockwell Automation Confidential 10

SRM Dialog Synchronization Tab Issues a manual command to attempt to synchronize the secondary chassis to make it available for switchover. Issues a manual command to disqualify the secondary chassis to make it unavailable for switchover. Issues a manual command to switch control to the secondary chassis. This can be used to test the redundant system. Issues a manual command allowing a disqualified secondary chassis with no partner to take control. Shows the result of the last four synchronization attempts of the redundant system. Rockwell Automation Confidential 11

SRM Dialog Chassis Profile Tab • Shows the current state of all the modules in this redundant controller chassis. Shows the progress of synchronization in percent. Shows the secondary’s readiness to take control. Shows the state of the modules (startup, faulted, etc). Rockwell Automation Confidential compatibility between the primary and secondary module. 12

SRM Dialog Event Log Tab • This dialog shows the history of the past 10 events. • Events that are logged include synchronizations, switchovers, etc. • This information is stored on the SRM module. Rockwell Automation Confidential 13

No programming required • A primary Logix 5555 automatically determines what data changes during its scan and automatically sends that data to its secondary Logix 5555. You don’t have to program messages or even specify certain data areas to transfer. It all just happens automatically. You just select a single checkbox on the controller properties dialog to enable redundancy. Rockwell Automation Confidential 14

Other Controller Properties Options Allows you to specify whether you want test edits to remain in effect after a switchover. This is useful for online edit changes. This enables redundancy. Lets you specify how much of the unused memory will be allocated for adding data online versus adding program online. Here you can see the status of this controller chassis and this controller. Here you can see the status of this controller’s redundant partner. Rockwell Automation Confidential 15

Automatic cross-loading of programs Logix 5555™ RUN A-B Quality Allen-Bradley Control. NET I/O RS 232 BAT A#01 REM Quality Allen-Bradley PRI COM OK Control. NET Redundancy Module I/O RS 232 BAT A#01 PRIM OK CHA CHB RUN OK PROG Logix 5555™ RUN A-B PRIM OK CHA CHB RUN Redundancy Module REM OK PRI COM OK PROG Rockwell Automation Confidential • You only have to download your program to the primary controller. The system will automatically cross-load the primary’s program to the secondary controller. 16

Bumpless Switchovers • The secondary controller is synchronized with the primary to provide a bumpless switchover for any outputs controlled by logic in the highest priority task: – Primary notifies secondary when user tasks start. – Primary notifies secondary when programs complete & provide a complete data ‘snapshot’. • Secondary doesn’t execute programs, but follows along, pending at each program start. • Incomplete transfers are ‘quarantined’ on secondary until complete. – At switchover, the new primary rolls back to the beginning of currently executing programs using ‘last good’ data snapshot. Rockwell Automation Confidential 17

Control. Logix Redundant Power Supply 1756 -PA 75 R / -PB 75 R Power Supplies • 85 - 265 VAC and 19 - 32 VDC Versions • Panel mount (1756 -A 4 footprint 6. 9" H x 5. 7" W x 5. 4" D) • Px 75 equivalent capacity 1756 -CPR Cables • 3 foot max length • Pin-outs provided if you want to make shorter cables 1756 -PSCA Chassis Adapter Module • Passive device funnels power to backplane • Series B chassis only Failure Annunciation • Normally Open solid state relay on each supply • Wire to any input module Rockwell Automation Confidential 18