High Availability Selection Guide
16Pages

Selection Guide High Availability Systems CompactLogix and ControlLogix Systems © Allen-Bradley ■ Rockwell Software AlltOlflcltiOll

High Availability Systems Selection Guide What's Inside Rockwell Automation Publication IA-SG003A-EN-P - July 2012

High Availability Systems Critical processes require systems with high availability in order to the following. • Maintain production • Protect against equipment or product losses • Protect against unplanned interruptions or potential hazards Availability is the probability that a system is operating successfully when needed. Availability (A) is calculated by using this A = MTBF / (MTBF + MTTR) MTBF = Mean Time Between Failure MTTR = Mean Time to Repair High availability encompasses productivity, including reliability and maintainability. Reliability is the likelihood that a device will...

High Availability Systems High Availability Options 4 Rockwell Automation Publication IA-SG003A-EN-P - July 2012

Hardware Redundancy The ControlLogix platform offers increased high availability through these features: • Improved diagnostics, including the following: - Internal diagnostics and status indicators - HART and other device technologies with sensor and actuator diagnostics - Inherent machine diagnostics • Runtime modifications, including the following: - Runtime partial import - Online edits - Removal and insertion under power (RIUP) of 1756,1715, and 1794/1797 modules - Addition of 1756 and 1715 modules in Run mode - Ability to update firmware at runtime The ControlLogix controller supports...

Hardware Redundancy Redundant Control Hardware The ControlLogix Enhanced Redundancy System uses a redundant chassis pair with identically specific components in each. One redundancy module and at least one ControlNet or EtherNet/IP communication module are required. The application operates from a primary chassis, but can switch over to the secondary chassis and components if necessary. Workstation EtherNet/IP Switch Logix5575 RUN FORCE SD EtherNet/IP™ Logix5575 EtherNet/IP™ OK RUN FORCE SD EtherNet/IP™ EtherNet/IP™ OK Redundant Chassis Pair Logix5575 RUN FORCE SD 1715 Redundant I/O OK 1756...

Hardware Redundancy In a redundant controller system, you need these components: • Two 1756 chassis, each with the same: - Modules in the same slots - Redundancy firmware revisions in each module - If on a ControlNet network, two additional ControlNet nodes outside the redundant chassis pair • The same redundancy module (1756-RM or 1756-RM2(1)) per chassis, to support the following: - As many as two 1756-L71,1756-L72,1756-L73,1756-L74,1756-L75,1756-L61,1756-L62,1761-L63 controllers or only - Maximum of seven communication modules, which can be 1756-CN2/B, 1756-CN2R/B, 1756-EN2T, 1756-EN2TR,...

Hardware Redundancy Redundant I/O Modules The 1715 redundant I/O system lets a ControlLogix controller communicate to a remote, redundant I/O chassis over an EtherNet/IP network. The 1715 redundant I/O system provides fault tolerance and redundancy for critical processes by using a redundant adapter pair and redundant I/O module pairs. The redundant I/O system must be connected to a ControlLogix system via an EtherNet/IP network. All connections are established via the Ethernet network by using the topologies supported by the 1756-EN2TR communication bridge. EtherNet/IP™ REDUNDANCY MODULE...

Hardware Redundancy Resilient EtherNet/IP Media Embedded switch technology is designed to enable end devices to form linear and ring network topologies. Products with EtherNet/IP embedded switch technology have two ports to connect to a linear or DLR network in a single subnet. You cannot use these ports as two Network Interface Cards (NICs) connected to two different subnets. Linear Network A linear network is a collection of devices that are daisy-chained together. The EtherNet/IP embedded switch technology allows this topology to be implemented at the device level. No additional switches...

Hardware Redundancy Device-level Ring (DLR) Network A DLR network is a single-fault tolerant ring network intended for the interconnection of automation devices. This topology is also implemented at the device level. No additional switches are required. EtherNet/IP™ RUN 0 DC INPUT NS LINK 1 I/O LINK 2 DC OUTPUT OK SD 1 24 VDC SOURCE 0 2 3 4 5 6 7 9 8 24 VDC SINK FORCE 10 11 12 13 14 15 1 2 3 4 5 6 7 9 8 10 11 12 13 14 15 00:00:BC:66:0F:C7 WARNING EXPLOSION HAZARD Do Not Disconnect While Circuit Is Live Unless Area Is Known To Be Non-Hazardous VDC + VDC CG FP+ FP- DC INPUT 0 1 2 3 4 5 6 7 V...

Hardware Redundancy Redundant ControlNet Media Redundant ControlNet media requires these components: • Redundant ControlNet scanner • Two identical ControlNet links EtherNet/IP™ REDUNDANCY MODULE EtherNet/IP™ • ControlLogix Controller • 1756-CN2R or 1756-CNBR Redundant ControlNet Media ControlNet Node ControlNet Node 32304-MC Redundant Power Supplies A redundant power supply system provides additional uptime protection for chassis used in critical applications. The redundant power supplies funnel power through the chassis adapter module to the ControlLogix Series B chassis backplane. To...

Hardware Redundancy Recommended Configuration for One Chassis Redundant Power Supplies Redundant Power Supplies ControlLogix ControlLogix 32306 -MC Recommended Configuration for Two Chassis Redundant Power Supplies ControlLogix ControlLogix Redundant Power Supplies Redundant Power Supplies ControlLogix ControlLogix 32307 -MC For a redundant power supply system, you need the following components: • Two of the same redundant power supplies (two 1756-PA75R or two 1756-PB75R) • One 1756-PSCA2 chassis adapter module • Two 1756-CPR2 cables to connect the power supplies to the 1756-PSCA2 chassis...

Hot Backup Hot backup is an application that uses ladder logic to switch I/O control to a second controller if the first controller experiences a problem that prevents it from controlling the system. This solution switches control to the second controller if the initial controller experiences any of these situations: • Recoverable fault (major fault) • Non-recoverable fault (such as the operating system of the controller faults) • Program mode (programmable feature) • Power loss on primary controller or primary chassis • Communication loss with the primary chassis, such as a failure of a...