Yokogawa EJX930A - Manual (Page 64)

<9. Maintenance>
9-12
IM 01C25R01-01E
Integral
indicator
HART communicator
display
Cause
4-20mA Output
operation during error
Countermeasure Status
group
AL.87
FLG. HI
FT high alarm 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.
9
AL.87
FLG. LO
FT low alarm Flange temperature is
below a preset lower
limit.
AL.88
INVR.DP
Invalid Ref 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
Invalid Ref SPL Low-pressure-side
fluctuation does not
reach the reference
fluctuation level required
to blockage detection.
AL.88
INVR.SH
Invalid Ref SPH High-pressure-side
fluctuation does not reach
the reference fluctuation
level required to blockage
detection.
AL.88
INVR.F
Invalid Ref F BlkF can not be used for
blockage detection for
some reasons.
AL.89
ILBD.OV
ILBD over range Appointed the diagnosis
range outside.
Check process
condition.
AL.89
B BLK
B Blocking 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.
10
AL.89
H BLK
H Side Blocking High-pressure-side
blockage is detected.
AL.89
L BLK
L Side Blocking Low-pressure-side
blockage is detected.
AL.89
H LRG
Large Fluct H Pressure fluctuation
amplitude of high-
pressure side is large.
AL.89
L LRG
Large Fluct L Pressure fluctuation
amplitude of low-
pressure side is large.
AL.89
A BLK
A Blocking A Blocking (single-side
blockage) is detected.
AL. 90
SIM
Simulate Mode Under Simulation Mode. Simulate input output. Check Simulation
Mode.
5
—
ET Fixed Mode Under Temperature Fix
Mode. PV is ET
Temp. Output Fix at 4mA. Leave from
Temperature Fix
Mode.
7