Honeywell R0512 manual Broadcast Hysteresis, Intrinsic Hysteresis for Analog Input Signals

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EXCEL 50/100/500/600/800

ATTRIBUTES

Broadcast Hysteresis

Broadcast hysteresis (V1.5.x) The attribute "Broadcast Hysteresis" is available for the datapoint type "Global Analog". The attribute "Broadcast Hysteresis" prevents new values from being broadcast to other controllers unless the datapoint value changes (positively or negatively) at least by the amount specified in the attribute "Broadcast Hysteresis". The minimum hysteresis value is 10-a(a = number of decimal places set in the attribute "Engineering Unit"), but not smaller than 0.2 (see also the example in section "Value Hysteresis" on page 35). The CARE default value (i.e. 1% of actual value and no less than 0.2) for this attribute is 0. Access to the attribute "Alarm 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, and Excel 50 MMI) via the B port (XC5010C / XC6010) or the serial port (Excel 100C, Excel 500), 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 "Access" attribute (default initialization value in CARE is 0). If several global points (remote points) are assigned to the same physical point, the lowest global point "Broadcast Hysteresis" value of all assigned global points is used.

Intrinsic Hysteresis for Analog Input Signals

A minimum default hysteresis of 37 mV (24 - 1 bit) for 0 to 10 V input signals is implemented. Due to the nonlinearity of NTC sensors, the hysteresis varies over the temperature range, whereas it is approximately constant for PT 100/1000/3000 and Balco 500 sensors. Approximations of hysteresis depending on the sensor and temperature range are summarized below.

NOTE The Intrinsic Hysteresis for analog input signals is not a user- programmable attribute, but rather an intrinsic hysteresis of the Excel 50/100/500/600/800.

NTC 20k Hysteresis varies nonlinearly over the entire temperature range and depending on whether the upper boundary (MAX LIMIT) or the lower boundary (MIN LIMIT) is exceeded. The approximations shown in Table 8 can be used in practice (intermediate values can be interpolated):

 

Table 8. Intrinsic hysteresis values for various temperature ranges

 

 

 

 

 

temperature range

average hysteresis

average hysteresis

 

MIN LIMIT

MAX LIMIT

 

 

 

-40 °C (-40 °F)

2.2

K (4.0 °F)

2.5

K (4.5 °F)

 

-30 °C (-22 °F)

1.3

K (2.3 °F)

1.3

K (2.3 °F)

 

 

 

 

 

 

 

0 °C (32 °F)

0.4

K (0.7 °F)

0.4

K (0.7 °F)

 

40 °C(104 °F)

0.5

K (0.9 °F)

0.4

K (0.7 °F)

 

80 °C (40 °F)

1.5

K (2.7 °F)

1.5

K (2.7 °F)

 

 

 

 

 

 

 

100 °C (212 °F)

3.0

K (5.4 °F)

2.7

K (4.9 °F)

 

130 °C (266 °F)

8.5

K (15.3 °F)

7.2

K (13.0 °F)

PT 100 (not with Excel 100C)

Hysteresis increases approx. linearly with temperature.

 

 

 

Average hysteresis:

0.75 K (1.35 °F)

 

 

 

Hyst. At -45 °C (-49 °F):

0.7 K (1.3 °F)

 

 

 

Hyst. At 145 °C (293 °F):

0.8 K (1.4 °F)

 

 

PT 1000/1

Hysteresis increases approx. linearly with temperature.

 

 

 

Average hysteresis:

0.8 K (1.4 °F)

 

 

 

Hyst. At -45 °C (-49 °F):

0.7 K (1.3 °F)

 

 

 

Hyst. At 145 °C (293 °F):

0.9 K (1.6 °F)

 

 

23

EN2B-0092GE51 R0512

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Contents Excel 50/100/500/600/800 Excel 50/100/500/600/800 Contents Value Hysteresis Trend Cycle SubtypeValue Write Protection Excel 50/100/500/600/800 Change Revision OverviewSection Sensor Offset added System Overview Overview Programming Physical Datapoints DatapointsPseudo Datapoints Flexible DatapointsData Points Global DatapointsMapped Datapoints V2.04.xx or higher Acknowledge Alarm V2.04.xx or higher Access LevelAttributes Active State Excel Active State prior toStatus text Alarm Suppression Alarm DelayAlarm Status prior to Alarm Type Alarm Status V2.04.xx or higherAlarm Definition Interval Counter Alarm StatusAttributes Delay Time Switching Down Delay Time Switching UpCycle Count High/Low Alarm/Warning Limits Feedback DelayDescriptors Engineering UnitHours Run Hours Since ServicedHours Run Log Hysteresis Alarm HysteresisTrend Hysteresis Example of alarm hysteresisBroadcast Hysteresis Intrinsic Hysteresis for Analog Input SignalsInterval Count Input/Output Status Text V2.04.xx or higherInterval Limit CharacteristicPull-Up Resistor Handling Configured Activated Or low By DIP Diagram High By @Last Change By plug-in For DI on AI ImpedanceMaintenance Alarm LED Mode XF823x, XFL823x, and XFx830x modulesManual Value Normally Open/Normally Closed V2.04.xx or higher Network Variable V2.04.xx or higherOperating Mode Off PhaseMotor Run Time Remote value Manual valueResulting value Output Type Point AlarmsSubtype Remote value Resulting ValuePulse Duration Safety Position XFx822x, XFx824x, and XFx830x modulesScaling Factor Sensor Offset Switching DownSuppress Point Switching down Switching down behavior Switch-On CounterTechnical Address Trend LoggingTrend Cycle Value HysteresisRoom Temp.1.10 ValueNumber of technical addresses for flexible datapoints Flexible datapoint Number of technical addressesWrite Protection List of Datapoint Attributes Attributes Attributes Structure Time ProgramsIndividual Time Programs Daily ProgramAnnual Program Weekly ProgramSpecial Day List Generating a Time ProgramToday Function Time Programs Prior to Alarm Handling04.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 Alarms Sent across the System Bus User Program AlarmsData Storage Alarm Handling Distributed I/O testing V2.04.xx or higher Test ModeCommunication System BusBus Initialization AccessBus Communication Runtime SynchronizationNew Bus Devices Initialization of Distributed I/O ModulesNetwork-Wide Controller Time Synchronization Excel IRC PC CommunicationRemote Communication Point RefreshingRemote Modem Connection General Remote Trending dial-upController Firmware 2.03.xx and Higher Controller Firmware 2.04.xx and HigherFor all other controllers equipped with Flash Eproms ExcelHBS Country and Language Settings Customize Windows Default Regional and Language SettingsMiscelleanous XL40A2MMI Care Country Controllers with Internal Text MMI XL Online CLTG00MMI CentraLine Country and Language SettingsGraphic 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 Index ModemfaqAutomation and Control Solutions