Data Summary: Wheel Impact (Salient)
I.
Included Data Elements of the data summary - Common Elements (Defined in XML
format)
<Type> DS (Data Summary)
<Format Version>1.0
<CreationTMST > 2001-12-17T09:30:47-05:00
<RR_DB_Key>2147483647
<LastUpdateTMST>2001-12-17T09:30:47-05:00
<DSType> SALIENT WHEEL IMPACT
<DS_Owner/Reporting_System>UPRR
<EquipmentMark>CSXT
<EquipmentNumber>5000
<Location> (location on Eqmt – EMIS nomenclature)
<ComponentType>WHEEL
<ComponentName>AXLE
<ComponentValue>1
<ComponentName>SIDE
<ComponentValue>R
<State> O (Open/closed)
<ElementName>OPEN_DATE (TMST when Opening criteria was met for DS creator)
<ElementName>MAX_RATIO (1 to 99)
<ElementName>MAX_DYNAMIC (0 to 999)
<ElementName>MAX_PEAK (0 to 999)
<ElementName>CNT_WLD_READS (1 to 999)
<ElementName>CNT_GT_90_PK (0 to 999)
<ElementName>CNT_GT_80_PK (0 to 999)
<ElementName>CNT_GT_30_DYN (0 to 999)
<ElementName>FIRST_DATE_GT_80_PK (present minus 1000 days to present)
<ElementName>FIRST_DATE_GT_90_PK (present minus 1000 days to present)
<ElementName>FIRST_DATE_GT_30_DYN (present minus 1000 days to present)
<ElementName>LAST_RATIO
<ElementName>LAST_DYNAMIC
<ElementName>LAST_EQMT_SPEED (0 to 99)
<ElementName>LAST_TMST_GE_20_DYN_OR_GE_2_RATIO (present minus 1000 days to present)
< ElementName>TMST_1_LT20Dyn_and_LT2Ratio (Last timestamp with readings Dyn<20 and Ratio<2)
<ElementName>TMST_2_LT20Dyn_and_LT2Ratio (2nd to last)
<ElementName>TMST_3_LT20Dyn_and_LT2Ratio (3rd to last) (present minus 1000 days to present)
NOTE :
Used for the Autoclose Process:
 TMST_1,2,3 are reset to null when LAST_TMST_GE_20_DYN_OR_GE_2_RATIO is
greater than (more recent than) TMST_1_LT20Dyn_and_LT2Ratio
 TMST_1,2,3 are cascaded (per Criteria for Closing (i), when a more recent event
LT20Dyn_and_LT2Ratio event occurs, it takes #1 position and #1 moves to #2, etc.)
<ElementName>CLOSE_DATE (present minus 1000 days to present)
<ElementName>CLOSE_REASON (as defined by Closing criteria)
<ElementName>CLOSE_USER_ID (as available from Close message)
Data Summary Definition Document – Salient Wheel Impact – Updated: June 1, 2012
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II.
a)
b)
c)
d)
Criteria for Opening a Salient Wheel Impact data summary when a data summary does
not exist for that asset and location:
Dynamic Impact >= 30 kips
OR Ratio >= 3.0
OR Peak Impact >= 65 kips
If a DS for an asset/location is opened by another DS creator, then a DS will be opened when a new WILD reading
is made for that asset/location
III. Criteria for Closing a Salient Wheel Impact data summary:
Wheelset Replaced (like MH or CRB jobcode) – Message published to DS owner indicating wheelset change date
greater than the timestamp of the latest timestamp GE 20Dyn or GE 2Ratio on any data summary for this wheel.
This message may originate from CRB jobcodes, processed by RailInc OR by a private/contract shop/company
indicating a wheelset change using web service or EHMS website OR by a railroad using a web service.
a) Wheelset Inspected and was found to be newer than the last date where it was measured >=20 kips dynamic or
>=2.0 ratio (like MR) – Message published to DS owner indicating that someone performed the aforementioned
inspection and believes that the wheelset was installed after the latest timestamp GE 20Dyn or GE 2Ratio on any
data summary for this wheel. Message may come from web service input or from EHMS web site input.
b) Wheelset OOR Runout Measured and found to be less than 0.020” (like MR) – Message published to DS owner
indicating that someone performed the aforementioned inspection after the latest reading GE20Dyn or GE2Ratio.
Message may come from web service input or from EHMS web site input.
c) Administrative/Opened in Error (due to detector error, AEI matching error, incorrect AEI tag placement) (like MN)
– Message may come from web service or from EHMS website input.
d) Deleted in UMLER (Like MI) – Message will come from UMLER system.
e) Autoclose logic:
a)

Three sequential WILD reads less than 20 Dynamic and less than 2.0 ratio for any open data summary on a
wheel. This is determined by three <TMST_n_LT20Dyn_and_LT2Ratio> timestamps greater than the latest
<LAST_TMST_GE_20_DYN_OR_GE_2_RATIO> timestamp evaluated over all open data summaries for that
asset and component location.

Logic: If there exists 3 <TMST_n_LT20Dyn_and_LT2Ratio> AFTER the latest
<LAST_TMST_GE_20_DYN_OR_GE_2_RATIO > timestamp across all industry data summaries, then the
data summary will be closed at Railinc and a close message will be sent to all data summary message
subscribers.
IV. Sample Logic for a rollup of data summaries of the Salient Wheel Impact type for display
in EHMS:

Car ID and Location and DSType = ‘direct translation’

Max Peak = Maximum of All open DS Max Peak Fields

Max Dynamic = Maximum of All open DS Max Dynamic Fields

Max Ratio = Maximum of All open DS Max Ratio Fields

Open Date = Minumum of all open DS Open Dates

LAST_RATIO = LAST RATIO from the open Data Summary with the most recent Last_Update_TMST

LAST_DYNAMIC = LAST DYN from the open Data Summary with the most recent Last_Update_TMST

LAST_EQMT_SPEED = Last EQMT_SPEED from the open DS with the most recent Last_Update TMST

CNT_WILD_READS = Sum of CNT_WILD READS from all open DSs

CNT_GT_90_PK = Sum of CNT_GT_90 _PK from all open DSs

Last_TMST_GE_20Dyn_or_GE_2Ratio = Max of Last_TMST_GE_20Dyn_or_GE_2Ratio from all open DSs

First_Date_GT_30Dyn = Minimum of First_Date_GT_30Dyn from open DSs

Open_Date = minimum of Open_Date for all open DSs

TMST_n_LT20Dyn_and_LT2Ratio = Latest of all TMST_(1,2,3)_LT20Dyn_and_LT2Ratio that are greater
than the maximum LAST_TMST_GE_20_DYN_OR_GE_2_RATIO from all open DSs
Data Summary Definition Document – Salient Wheel Impact – Updated: June 1, 2012
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