Yokogawa EJX440A - Manual (Page 60)

<4. Diagnostics>
4-20
IM 01C25T01-01E
Integral
indicator
HART communicator
display
Cause
Output operation
during error
Countermeasure
Status
group
AL. 55
SP. ADJ
SP SPAN trim err Continues to operate
and output.
Adjust settings and
change them as
needed.
7
SP ZERO trim err
AL. 60
SC. CFG
SC config error Specified values or
settings do not meet the
conditions.
Continues to operate
and output without
signal characterizing.
Check settings and
change them as
needed.
AL. 79
OV. DISP
— Displayed value
exceeds limit.
Continues to operate
and output.
—
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.
8
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 fluctuation
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-side-pressure
fluctuation fluctuation
does not reach the
reference fluctuation
level required to
blockage detection.
AL.88
INVR.SH
Invalid Ref SPH High-side-pressure
fluctuation 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.
9
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.