PMC TRANS/REFL on MEDM showed red values for long time.
TRANS (a.k.a C1:PSL-PSL_TRANSPD) was the issue of the EPICS db.
REFL (a.k.a. C1:PSL-PMC_RFPDDC) was not physically connected.
There was an unknown BNC connected to the PMC DC output instead of dedicated SMA cable.
So they were swapped.
Now I run the following commands to change the EPICS thresholds:
ezcawrite C1:PSL-PMC_PMCTRANSPD.LOLO 0.8
ezcawrite C1:PSL-PMC_PMCTRANSPD.LOW 0.85
ezcawrite C1:PSL-PMC_PMCTRANSPD.HIGH 0.95
ezcawrite C1:PSL-PMC_PMCTRANSPD.HIHI 1
ezcawrite C1:PSL-PMC_RFPDDC.HIHI 0.05
ezcawrite C1:PSL-PMC_RFPDDC.HIGH 0.03
ezcawrite C1:PSL-PMC_RFPDDC.LOW 0.0
ezcawrite C1:PSL-PMC_RFPDDC.LOLO 0.0
As these commands only give us the tempolary fix, /cvs/cds/caltech/target/c1psl/psl.db was accordingly modified for the permanent one.
grecord(ai,"C1:PSL-PMC_RFPDDC")
{
field(DESC,"RFPDDC- RFPD DC output")
field(DISV,"1")
field(SCAN,".1 second")
field(DTYP,"VMIVME-3113")
field(INP,"#C0 S32 @")
field(EGUF,"10")
field(EGUL,"-10")
field(EGU,"Volts")
field(PREC,"3")
field(LOPR,"-10")
field(HOPR,"10")
field(AOFF,"0")
field(LINR,"LINEAR")
field(LOW,"0.0")
field(LSV,"MINOR")
field(LOLO,"0.0")
field(LLSV,"MAJOR")
field(HIGH,"0.03")
field(HSV,"MINOR")
field(HIHI,"0.05")
field(HSV,"MAJOR")
}
grecord(ai,"C1:PSL-PMC_PMCTRANSPD")
{
field(DESC,"PMCTRANSPD- pre-modecleaner transmitted light")
field(DISV,"1")
field(SCAN,".1 second")
field(DTYP,"VMIVME-3123")
field(INP,"#C0 S10 @")
field(EGUF,"10")
field(EGUL,"-10")
field(EGU,"volts")
field(PREC,"3")
field(LINR,"LINEAR")
field(HOPR,"10")
field(LOPR,"-10")
field(AOFF,"0")
field(LOW,"0.8")
field(LSV,"MINOR")
field(LOLO,"0.85")
field(LLSV,"MAJOR")
field(HIGH,"0.95")
field(HSV,"MINOR")
field(HIHI,"1.00")
field(HSV,"MAJOR")
}
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