1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com

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A-4 Response Times in ControlLogixRemote Chassis ConfigurationFigure A.2 shows an example system where the following occurs:• input data changes on the analog input module• the data is transmitted to the controller via the 1756-CNBmodules• the controller runs its program scan and reacts to the datachange, including sending new data to the output module viathe 1756-CNB modules• the output module behavior changes based on the new datareceived from the controllerFigure A.4ControllerControlNetBridge ModuleControlNetBridge ModuleAnalog InputModuleAnalog OutputModuleUse the following formula to determine worst-case reaction time:Worst-Case Reaction Time =Input Module Filter Setting (1) + Input Module Real Time Sample (RTS) rate (1)+ Remote 1756-CNB RPI (1) + Controller Program Scan (2) + Output Module RPI (1)+ Remote 1756-CNB RPI (1) + Output Module Hardware Delay (3)(1)This setting is user-defined. For more information, see the ControlLogix Digital I/O Modules user manual, publication 1756-UM058.(2)This figure is calculated by adding instruction execution times. For more information on instruction execution times in RSLogix 5000, see theLogix5000 Controllers Execution Time and Memory Use Reference, publication 1756-RM087.(3) Hardware delay is module-dependent. Specific hardware delay times are listed in the installation instructions for each catalog number. For acomplete list of installation instructions, see Table 1.1 on page 1-6.Publication 1756-RM001B-EN-P - October 2003
Appendix BSystem Self-Testing andUser-Programmed ResponsesThis chapter explains self-testing in a ControlLogix system and pointsto more information about user-programmed responses.Validation TestsValidation tests are performed at every proof test interval.• Manually Cycle Inputs to ensure that all inputs are operationaland not stuck in the ON state• Manually Pulse Test outputs which do not support runtime PulseTesting. The relays in the Redundant Power Supplies mustbe tested to ensure they are not stuck in the Closed state.Users can automatically perform proof tests by switching groundopen on input modules and checking to make sure all inputpoints go to zero (turn OFF.).All system components which do not have runtime diagnostics mustbe tested as part of the System Initialization Tests.System Self TestsThe SIL2-certified ControlLogix system is designed to automaticallyshut down in the event of a failure or fault. The following informationprovides details on how to program and configure routines to monitordiagnostic and system status.1 Publication 1756-RM001B-EN-P - October 2003
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Using ControlLogixin SIL2 Applicati
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Summary of Changes 2Notes:Publicati
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Preface 2Table Preface.1Section: Ti
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Table of Contents 4Additional Infor
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2-6 The ControlLogix SystemSoftware
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Page 104 and 105: D-2 Spurious Failure EstimatesNotes
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Page 108 and 109: E-4 Sample Probability of Failure o
Page 110: 2 IndexMMean time between failures
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