Yokogawa EJX115A - Manual (Page 41)

<7. Errors and Countermeasures>
39
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
Amplifier temp.
Adjust Flg Temp Coef.
AL.87
FLG. LO
Flange temperature is below a preset
lower limit.
AL.88
INVR.DP
Differential pressure/pressure
fluctuation 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 fluctuation does not
reach the reference fluctuation level
required to blockage detection.
AL.88
INVR.SH
High-pressure-side fluctuation does not
reach the reference fluctuation 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 fluctuation amplitude of high-
pressure side is large.
AL.89
L LRG
Pressure fluctuation 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 flow. 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
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