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 |
EPICS PV Name |
SLC Name |
<Primary>:<Area>:<Position>:<Attribute>. |
<Micro>.<Primary>.<Unit>.<Secondary> |
Table 1.1 |
EPICS PV Name |
Purpose |
Units |
Range |
<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 |
EPICS PV Attribute |
SLC Secondary |
Description |
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 |