25 November 200525 November 2005 AB/CO TC : Post-MortemAB/CO TC : Post-Mortem

Post-MortemPost-MortemSignal NamingSignal Naming

R. BillenR. Billen

AB-COAB-CO

25 November 200525 November 2005 AB/CO TC : Post-MortemAB/CO TC : Post-Mortem Naming - Naming - 22/5/5

R. B

illen

R. B

illen

RecapRecap NamingNaming: : The importance for data correlation between distributed The importance for data correlation between distributed

information systems was underlined during the AB-LTC Review information systems was underlined during the AB-LTC Review (Nov

2003). A naming scheme needed to be defined and supported.. A naming scheme needed to be defined and supported. SyntaxSyntax: : formal rules for the use, order and arrangement of symbolsformal rules for the use, order and arrangement of symbols

LHC-C-QA-0001 rev.1.0LHC-C-QA-0001 rev.1.0 (July 2004)

SemanticsSemantics: meaning of the symbols, usage of the codes: meaning of the symbols, usage of the codes LHC-C-QA-0002 rev.1.0LHC-C-QA-0002 rev.1.0 (July 2004)

ScopeScope: All controls accessible components (: All controls accessible components (entitiesentities) and their ) and their pieces of information (pieces of information (parametersparameters) in the LHC) in the LHC

ProgressProgress: iterative discussions for LHC systems to apply the rules to : iterative discussions for LHC systems to apply the rules to implement the respective systemsimplement the respective systems

QPSQPS (K. Dahlerup-Petersen, R. Denz, A. Hilaire, H. Milcent) (K. Dahlerup-Petersen, R. Denz, A. Hilaire, H. Milcent) Interlock loopsInterlock loops (M. Zerlauth, J. Marienthoz, B. Puccio) (M. Zerlauth, J. Marienthoz, B. Puccio) Power ConvertersPower Converters (S. Page) (S. Page)

25 November 200525 November 2005 AB/CO TC : Post-MortemAB/CO TC : Post-Mortem Naming - Naming - 33/5/5

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R. B

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General naming scheme General naming scheme

<LHC entity>:<quantity code>

<LHC entity code>.<location>.<function>

<LHC equipment code>

99%An “occurrence” may slip

in to guarantee uniqueness of the entity

For example:LHC half cellCERN worksPowering subsector

To specify in more detail the entity, if necessary

https://edms.cern.ch/cedar/plsql/codes.systems

For example:STATUSVOLTAGETEMPERATURE

25 November 200525 November 2005 AB/CO TC : Post-MortemAB/CO TC : Post-Mortem Naming - Naming - 44/5/5

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R. B

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Signal names in practiceSignal names in practice

Have been logged during hardware commissioning heat runs

SignalSignal DescriptionDescription SystemSystem

MQ.12L3:U_1_EXTMQ.12L3:U_1_EXT Voltage across first half of MQ.12L3 external apertureVoltage across first half of MQ.12L3 external aperture QPSQPS

MB.A8R7:ST_MAGNET_OKMB.A8R7:ST_MAGNET_OK Magnet status (SC or quenched) MB.A8R7Magnet status (SC or quenched) MB.A8R7 QPSQPS

RCD.A56B2:I_DIDTRCD.A56B2:I_DIDT Current slope in corrector circuit RCD.A56B2Current slope in corrector circuit RCD.A56B2 QPSQPS

DQAMG.UA63.RQ4.L6:ST_FIPDQAMG.UA63.RQ4.L6:ST_FIP WorldFIP status from controller on circuit RQ4.L6WorldFIP status from controller on circuit RQ4.L6 QPSQPS

DQQDL.A8R7:ST_PWR_PERMDQQDL.A8R7:ST_PWR_PERM Power permit from quench loop controller DQQDL.A8R7Power permit from quench loop controller DQQDL.A8R7 QPSQPS

RCD.A56B2:ST_ABORT_PICRCD.A56B2:ST_ABORT_PIC Quench status signal received by PIC for circuit RCD.A56B2Quench status signal received by PIC for circuit RCD.A56B2 PICPIC

RB.A12.ODD:CMD_ABORT_PICRB.A12.ODD:CMD_ABORT_PIC Fast abort request issued by PIC for odd side on circuit RB.A12Fast abort request issued by PIC for odd side on circuit RB.A12 PICPIC

CIP.UA63.ML6:ST_SUPPLY_24V_1CIP.UA63.ML6:ST_SUPPLY_24V_1 Status of the power supply 24V_1 in CIP.UA63.ML6 Status of the power supply 24V_1 in CIP.UA63.ML6 PICPIC

RPTE.UA87.RB.A81:I_REFRPTE.UA87.RB.A81:I_REF Current reference of 13kA power converter on MB circuitCurrent reference of 13kA power converter on MB circuit PCPC

RPTE.UA87.RB.A81:STATE_PLLRPTE.UA87.RB.A81:STATE_PLL Phase-locked loop state of 13 kA power converter on MB circuitPhase-locked loop state of 13 kA power converter on MB circuit PCPC

RPLB.UA83.RCOSX3.L8:I_MEAS RPLB.UA83.RCOSX3.L8:I_MEAS Measured current of 120A power converter for inner triplet skew Measured current of 120A power converter for inner triplet skew octupole corrector circuitoctupole corrector circuit

PCPC

RPMBB.UA83.RQSX.L8:STATE RPMBB.UA83.RQSX.L8:STATE State of 600A power converter for inner triplet skew quadrupole State of 600A power converter for inner triplet skew quadrupole corrector circuitcorrector circuit

PCPC

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R. B

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R. B

illen

A few things to noteA few things to note The The signal naming databasesignal naming database is intended to give support is intended to give support

in comprehension of the signals:in comprehension of the signals:Portal : Portal : http://http://cern.chcern.ch/service-acc-naming/service-acc-naming

These signal names are the signal identifiers in These signal names are the signal identifiers in Post-Post-MortemMortem data (SDDS files), the data (SDDS files), the SupervisionSupervision systems, the systems, the MeasurementMeasurement service and the service and the LoggingLogging service. service.

The correspondence in the The correspondence in the AlarmAlarm service is less obvious service is less obvious The naming scheme covers the The naming scheme covers the signal namessignal names and the and the

LHC entitiesLHC entities to which they logically belong to which they logically belong The naming scheme The naming scheme does notdoes not cover the names of cover the names of

software objectssoftware objects ( e.g. FESA devices, properties) ( e.g. FESA devices, properties)