ABB Triguard SC300E Safety Manual

Also see for Triguard SC300E: User manual

Contents

ABB Triguard SC300E Safety Manual Manual pdf 24 page image

Issue 5 - September 2006 Page 24 of 651 Logic Supply B power fail fault2 Logic Supply C power fail fault3 Reserved4 Reserved5 Reserved6 Field power fail fault7 Output discrepancy error8 Reserved9 Reserved10 Reserved11 Reserved12 Reserved13 Reserved14 Reserved15 ReservedTable 4 Piano and Analogue Fault FlagsThe following alarm contacts are available and can be wired into the system for use by theapplication logic.Power supply fault 2 off, any system or field power supplySystem cabinet over-temperature Cabinet high temperature \ ventilationalarm, if fitted.Fuse failure Any fuse failure, grouping being applicationdependent.Watchdog monitoring alarms 3 off inputs monitoring the externaltriplicated watchdog.Table 5 System Alarms3.5.9 Automatic Diagnostic ActionCertain actions, dependent on configuration, must be taken by the application logic on the resultof certain error flags and combination of error flags.3.5.10 Without Time Constraint ConfigurationIf a system is configured without time constraint (eg each critical process parameter is controlledby at least two separate digital output modules), then only annunciation of diagnostics isrequired.3.5.11 With Time Constraint ConfigurationIf a system is configured with time constraint (eg any critical process parameter is controlled bya single TMR digital output module) then Global Output bit is used to start a timer equal to thetime constraint of the Output Module and when this timer has elapsed an ESD command shouldbe instigated. Example shown in Appendix 13.5.12 Long Process Time Constraint SystemFor systems controlling a process that has single inputs configured using the single slot hotrepair facility then the "Single Slot Off-Line" error flag must be used to start a timer equal to theprocess time constraint. When this timer is elapsed an ESD command should be instigated.3.5.13 Initialisation FlagsThis flag indicates a wrong configuration of I/O modules or an I/O module or modules missing.Although these errors are inherently fail safe (eg when an on-line output module is removed itsoutputs automatically fail-safe).