LCLS Magnet Database Channel Attributes
IOC PV Lists
Database Naming Conventions
Table 1.1 is a subset of most commonly used EPICS PV name attibutes. For a complete lists see Table 1.2 below.
Table 1.0 |
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EPICS PV Name | SLC Name |
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<Primary>:<Area>:<Position>:<Attribute>. | <Micro>.<Primary>.<Unit>.<Secondary> |
Table 1.1 |
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EPICS PV Name | Purpose | Units | Range |
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<Magnet>:IN20:<Position>:BDES | Magnet B field control | kG-m | BDES.LOPR-BDES.HOPR |
<Magnet>:IN20:<Position>:CTRL | Magnet Function | numeric | 1=TRIM,2=PERTURB |
<Magnet>:IN20:<Position>:BCTRL | Set B field and immediately Perturb; updates BDES | kG-m | BCTRL.LOPR-BCTRL.HOPR |
<Magnet>:IN20:<Position>:BACT | Readback; actual value of B | kG-m | BACT.LOPR-BACT.HOPR |
Table 1.2 |
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EPICS PV Attribute | SLC Secondary | Description |
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HSTA | HSTA | Control Bits |
STAT | STAT | Status Bits |
TRIMTOD.TIME | TTIM | Last trim time |
TRIMTRYCNT | ITRY | - of attempts required for trim
|
TRIMENABLE | - | 1=Trim enabled |
CTRL | - | Control Request - magnet function |
STATUS | - | Status of Control Action |
HSTACTRL | - | Translates SLC HSTA to individual EPICS records |
BDES | BDES | Desired B field Value |
BCTRL | - | Set B field value, then perturb; updates BDES |
BACT | BACT | Physical Units val converted from IACT |
BMON | BMON | Physical Units val converted from IMON |
BCTRL.DRVH | BMAX | Maximum Desired Value, B field |
IDES | IDES | Desired Control Value (amperes) |
IACT | IACT | Control Value from Hardware (Primary) |
IMON | IMON | Control Value from Hardware (Secondary) |
IRIPL | RIPL | Ripple Current Readback |
IDAC | DACV | DAC Readback |
ICTRL.DRVH,DRVL | IMMO | Control Limits |
IACT.HIHI, LOLO | IMMS | Standardization, Calib Control Limits |
POLYCOEF.A to L | IVBU | Polynomial Coefficients |
POLYCOEF.A to L | IVBD | Same as IVBU |
STDZDIRECTION | - | UP/DOWN direction of standardization |
IACTPREVOK | IPRV Last Good Readback |
BDELTAS.B | TOLS(1) | Warning Delta |
BDELTAS.C | TOLS(2) | Warning Fraction |
BACT.ADEL | TOLS(3) | Alarm Delta |
BDELTAS.E | TOLS(4) | Alarm Fraction |
BDELTAS.F | TOLF | Monitor Fraction |
IACT.ADEL | ATOL(1) | Standardization Delta |
IDELTAS.C | ATOL(2) | Standardization Fraction |
STDZIMAX or IDES.HIGH | IMAX | Max or min current during standardization |
STDZTOD.TIME | KTIM | Last successful standardization time |
STDZLOSTTOD.TIME | ZTIM | Last time standardization lost |
BDELTAS.F | TOLF | Monitor Fraction |
IACT.ADEL | ATOL(1) | Standardization Delta |
IDELTAS.C | ATOL(2) | Standardization Fraction |
STDZIMAX | IMAX | Max or min current during standardization |
STDZTOD.TIME | KTIM | Last successful standardization time |
STDZLOSTTOD.TIME | ZTIM | Last time standardization lost |
STDZENABLE | - | 1=Standardize enabled |
BDELTAS.F | TOLF | Monitor Fraction |
IACT.ADEL | ATOL(1) | Standardization Delta |
IDELTAS.C | ATOL(2) | Standardization Fraction |
CALBTOD.TIME | CTIM | Last successful calibration time |
CALBOK | - | 1=Calibration successful |
NOCONTROL | - | 1=Can't control this magnet; 0 otherwise |
FBCKCONTROL | - | 1=Magnet under feedback control |
INSERVICE | - | 1=in service |