Honeywell R0512 manual Trend Hysteresis, Example of alarm hysteresis

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ATTRIBUTES

EXCEL 50/100/500/600/800

 

 

 

Fig. 11. Example of alarm hysteresis

The “normal” and “alarm” states as defined by the attribute "Alarm Hysteresis" are the determined using the appropriate values in the formula given above:

Range = [10-2to (Max1 -Min1)] = [0.01 to 2]

Table 7 lists the resulting alarm conditions for the chosen hysteresis value of 0.05:

Table 7. Alarm conditions for alarm hysteresis

limit

normal to alarm condition

alarm to normal condition

Max 1

4.00

4.00

- 0.05 = 3.95

 

 

 

 

Max 2

5.00

5.00

- 0.05 = 4.95

 

 

 

 

Min 1

2.00

2.00

+ 0.05 = 2.05

Min 2

0.5

0.5 + 0.05 = 0.55

Trend Hysteresis

Trend hysteresis (V1.5.x) The attribute "Trend Hysteresis" is available for the trend functions “Local Trend Data” and “Trend Setup Data”. The attribute "Trend Hysteresis" prevents new values from being written to the trend buffer unless the datapoint value changes (positively or negatively) at more than the specified trend hysteresis. The minimum hysteresis value is 10-a(a = number of decimal places set in the attribute "Engineering Unit"). The CARE default value (i.e. 1% of actual value and no less than 0.2) for this attribute is 0. Access to "Trend Hysteresis" is also possible via RIA/WIA.

This value can be edited from an operator interface (XI581 (not with XCL5010, Excel 100C), XI582, XL-Online, or Excel 50 MMI) via the B port (XC5010C/XC6010) or the serial port, the system bus (XBS 1.3.3 and higher and XFI 1.6.1 and higher) and CARE RIA/WIA statements. The password level for this attribute is determined by the attribute "Access" (default initialization value in CARE is 0).

Fig. 12. Example of the attribute "Trend Hysteresis"

EN2B-0092GE51 R0512

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Contents Excel 50/100/500/600/800 Excel 50/100/500/600/800 Contents Subtype Value Hysteresis Trend CycleValue Write Protection Excel 50/100/500/600/800 Revision Overview ChangeSection Sensor Offset added System Overview Overview Programming Datapoints Physical DatapointsFlexible Datapoints Pseudo DatapointsGlobal Datapoints Data PointsMapped Datapoints V2.04.xx or higher Access Level Acknowledge Alarm V2.04.xx or higherAttributes Active State prior to Active State ExcelStatus text Alarm Delay Alarm SuppressionAlarm Status prior to Alarm Status V2.04.xx or higher Alarm TypeAlarm Definition Interval Counter Alarm StatusAttributes Delay Time Switching Up Delay Time Switching DownCycle Count Feedback Delay High/Low Alarm/Warning LimitsDescriptors Engineering UnitHours Since Serviced Hours RunHours Run Log Alarm Hysteresis HysteresisExample of alarm hysteresis Trend HysteresisIntrinsic Hysteresis for Analog Input Signals Broadcast HysteresisInput/Output Status Text V2.04.xx or higher Interval CountCharacteristic Interval LimitConfigured Activated Or low By DIP Diagram High By @ Pull-Up Resistor HandlingLast Change By plug-in For DI on AI ImpedanceLED Mode XF823x, XFL823x, and XFx830x modules Maintenance AlarmManual Value Network Variable V2.04.xx or higher Normally Open/Normally Closed V2.04.xx or higherOff Phase Operating ModeMotor Run Time Manual value Remote valueResulting value Point Alarms Output TypeSubtype Remote value Resulting ValueSafety Position XFx822x, XFx824x, and XFx830x modules Pulse DurationScaling Factor Switching Down Sensor OffsetSuppress Point Switch-On Counter Switching down Switching down behaviorTechnical Address Trend LoggingValue Hysteresis Trend CycleValue Room Temp.1.10Number of technical addresses for flexible datapoints Flexible datapoint Number of technical addressesWrite Protection List of Datapoint Attributes Attributes Attributes Time Programs StructureIndividual Time Programs Daily ProgramWeekly Program Annual ProgramGenerating a Time Program Special Day ListToday Function Time Programs Alarm Handling Prior to04.x System Alarms System alarmsAlarm Alarm text Cond Cause/reason English Code # BenefitsAlarm Handling Warm Start With corresponding function of XBS or XL-Online System Alarms Suppression V .04.xx or higher User Program Alarms Alarms Sent across the System BusData Storage Alarm Handling Test Mode Distributed I/O testing V2.04.xx or higherCommunication System BusAccess Bus InitializationBus Communication Runtime SynchronizationInitialization of Distributed I/O Modules New Bus DevicesNetwork-Wide Controller Time Synchronization PC Communication Excel IRCRemote Communication Point RefreshingRemote Modem Connection Remote Trending dial-up GeneralController Firmware 2.03.xx and Higher Controller Firmware 2.04.xx and HigherExcel For all other controllers equipped with Flash EpromsCustomize Windows Default Regional and Language Settings HBS Country and Language SettingsMiscelleanous XL40A2MMI Care Country Controllers with Internal Text MMI XL Online CentraLine Country and Language Settings CLTG00MMIGraphic MMI CLMMI00N2x Tiger Controllers with Hex Dec Char Unicode ISO/IEC 10646-12000 Character Name Latin Small Letter L Latin Small Letter O with Diaeresis Character Settings Eastern Europe Latin Small Letter D Latin Small Letter U with Ring Above Latin Capital Letter L with Acute Character Settings Turkey Miscelleanous Latin Small Letter D Latin Capital Letter I with DOT Above Latin Capital Letter G with Breve Procedure 1. In Windows, click StartSettingsControl panel Miscelleanous Miscelleanous Miscelleanous Miscelleanous Modemfaq IndexAutomation and Control Solutions