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

  1. 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