ABB UAC389AE01 HIEE300888R0001 Logical Sequence Card

ABB UAC389AE01 HIEE300888R0001 Logical Sequence Card

• Executes control ABB UAC389AE01 HIEE300888R0001 programs developed and debugged with TriStation™ 1131 Developer’s Workbench Software orABB UAC389AE01 HIEE300888R0001 TriStation MSW software. • Provides intelligence in the input and output modules to reduce the workload of the Main Processors. Each I/O module has three microprocessors. Input module microprocessors filter and debounce the inputs and diagnose hardware faults on the module. Output module microprocessors supply information for the voting of output data, check loopback data from the output terminal for ABB UAC389AE01 HIEE300888R0001 final validation of the output state, and diagnose field-wiring problems. • Provides integral online diagnostics with adaptive-repair capabilities. • Allows normal maintenance while the Tricon controller is operating, without disturbing the controlled process. • Supports transition to a hot-spare I/O module for critical applications where prompt service may not be possible.

ABB UAC389AE01 HIEE300888R0001 Fault Tolerance Fault tolerance, the most important capability of the Tricon controller, is the ability to detect transient and steady-state error conditions and to take appropriate corrective action online. With fault tolerance, there is an increase in safety and an increase in the availability of the controller and the process being controlledABB UAC389AE01 HIEE300888R0001

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