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General| Brand | Allen-Bradley |
|---|---|
| Model | 1756-CNB |
| Category | Control Systems |
| Language | English |
Provides essential safety information, including definitions of warning symbols and their meanings.
Highlights new and updated information within the current document release.
Details specific topics with changes and their corresponding page numbers.
Provides an overview of the ControlLogix redundancy system and its core concepts.
Details the main parts of a redundant system and required firmware combinations.
Defines essential terms like primary chassis, switchover, and explains operational concepts.
Covers online edits, scan time, and network address handling during system switchovers.
Summarizes criteria for a successful ControlLogix redundancy system layout.
Explains the process of designing a ControlLogix redundancy system.
Guidelines for laying out the system and placing chassis and I/O modules.
Covers terminal limitations and planning for ControlNet/EtherNet/IP networks.
Discusses redundant media, power supplies, and additional design factors.
Introduces system installation and covers preliminary information and safety.
Guides the installation of chassis and controllers, following specific publications.
Details installing modules like CNB, ENBT/EWEB, SRM, and configuring them.
Covers installing remote chassis and performing module firmware updates.
Explains how to check the installed system for proper synchronization capability.
Explains how to set and change the configuration of the 1757-SRM module.
Details opening the SRM configuration tool and verifying its revision for compatibility.
Covers setting the SRM clock and performing manual switchover tests.
Explains how to manage auto-synchronization and program control via SRM messaging.
Introduces controller configuration and planning for online edits and test edits.
Covers controller configuration for redundancy and setting up communications.
Focuses on minimizing scan time, estimating crossload, and maintaining data integrity.
Guides project download, ControlNet scheduling, and task watchdog time setup.
Covers commissioning, maintaining, and troubleshooting redundancy systems.
Diagnoses switchovers, disqualifications, and synchronization failures.
Explains how to interpret and export SRM event logs for diagnostics.
Covers manual synchronization, communication optimization, and memory/CPU usage.
Explains how to update modules and redundant systems.
Details replacing CNB modules from Series D to E while the system is online.
Covers updating control systems offline and updating firmware online.
Explains keeping HMIs and messages pointing to the primary chassis across subnets.
Details setting up HMI communication using Alias Topic Switcher and RSLinx.
Guides on sending messages and determining the primary chassis based on redundancy state.
Explains how to convert an existing system to a redundant configuration.
Details the process of reconfiguring local I/O modules to remote ones.
Covers replacing local I/O tags and any aliases referencing them.
Explains how to use the redundancy object to learn about system status.
Lists and describes attributes related to chassis, module, and partner redundancy states.
Explains the consequences of using Series B ControlNet Bridge modules.
Details temporary communication loss when using Series B CNB/DHRIO modules.
Covers communication stoppage and corrective actions for Series B modules.
Explains known restrictions affecting ControlLogix redundancy systems.
Lists features like local chassis I/O, event tasks, and motion control that are restricted.
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