YOKOGAWA EJX Series - Page 41

  <7.ErrorsandCountermeasures>
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IM01C25A01-01E
Integral
indicator
Cause
4-20mAOutput
operationduringerror
Countermeasure
AL.79
OV.DISP
Displayedvalueexceedslimit. Continuestooperateandoutput. Checksettingsandchangethemas
needed.
AL.87
FLG.HI
Flangetemperatureexceedsapreset
upperlimit.
ItdependsontheDiagOutOption
setting.
Off:Continuetooperateandoutput.
Burnout:OutputsAOupperlimitorAO
lowerlimit.
Fallback:OutputsDiagOutFixedVal.
Checktheheaterfailure.
Checkthecapsuletemp.and
Ampliertemp.
AdjustFlgTempCoef.
AL.87
FLG.LO
Flangetemperatureisbelowapreset
lowerlimit.
AL.88
INVR.DP
Differentialpressure/pressure
uctuationdoesnotreachthereference
levelrequiredtoblockagedetectionso
thatnoblockagedetectioniscarried
out.
Continuetooperateandoutput. Checkprocesscondition.
AL.88
INVR.SL
Low-pressure-sideuctuationdoesnot
reachthereferenceuctuationlevel
requiredtoblockagedetection.
AL.88
INVR.SH
High-pressure-sideuctuationdoesnot
reachthereferenceuctuationlevel
requiredtoblockagedetection.
AL.88
INVR.F
BlkFcannotbeusedforblockage
detectionforsomereasons.
AL.89
ILBD.OV
Appointedthediagnosisrangeoutside.
AL.89
BBLK
BBlocking(both-sideblockage)is
detected.
ItdependsontheDiagOutOption
setting.
Off:Continuetooperateandoutput.
Burnout:OutputsAOupperlimitorAO
lowerlimit.
Fallback:OutputsDiagOutFixedVal.
Checkprocesscondition.
AL.89
HBLK
High-pressure-sideblockageis
detected.
AL.89
LBLK
Low-pressure-sideblockageis
detected.
AL.89
HLRG
Pressureuctuationamplitudeofhigh-
pressuresideislarge.
AL.89
LLRG
Pressureuctuationamplitudeoflow-
pressuresideislarge.
AL.89
ABLK
ABlocking(single-sideblockage)is
detected.
AL.90SIM UnderSimulationModeforow. Simulateinputoutput. CheckSimulationMode.
AL.91F.SIM UnderSimulationModefordevice
variables.
OutputthesettingvalueofSimulate-
Value
CheckSimulationMode
AL.91P.SIM
AL.91SP.SIM
AL.91
ET.SIM
AL.91
TF.SIM
AL.91
PCT.SIM
AL.91
AO.SIM
ErrorsandCountermeasures
7