Yokogawa EJA440E - Manual (Page 73)

<4. Diagnostics>
4-26
IM 01C25T01-06EN
Integral
indicator
HART configuration
tool display
Cause
4-20mA Output
operation during error
Countermeasure
Status
group
* 1
Diagnostic
List
group * 2
AL. 79
OV. DISP
— Displayed value exceeds
limit.
Continues to operate and
output.
Check settings and
change them as
needed.
—
D
ia
g
St
at
us
AL.87
FLG. HI
FT high alarm * 1
Flg Temp High Alarm
* 2
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 * 1
Flg Temp Low Alarm
* 2
Flange temperature is
below a preset lower
limit.
AL.88
INVR.DP
Invalid Ref DP * 1
Invalid Ref fDP * 2
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 * 1
Invalid Ref fSPl * 2
Low-pressure-side
fluctuation does not
reach the reference
fluctuation level required
to blockage detection.
AL.88
INVR.SH
Invalid Ref SPH * 1
Invalid Ref fSPh * 2
High-pressure-side
fluctuation fluctuation does
not reach the reference
fluctuation level required to
blockage detection.
AL.88
INVR.F
Invalid Ref F * 1
Invalid Ref BlkF * 2
BlkF can not be used for
blockage detection for
some reasons.
AL.89
ILBD.OV
ILBD over range * 1
Outside Diagnosis
Range * 2
Appointed the diagnosis
range outside.
AL.89
B BLK
B Blocking * 1 , * 2 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
D
ia
g
St
at
us
AL.89
H BLK
H Side Blocking * 1
High Side Blocking * 2
High-pressure-side
blockage is detected.
AL.89
L BLK
L Side Blocking * 1
Low Side Blocking * 2
Low-pressure-side
blockage is detected.
AL.89
H LRG
Large Fluct H * 1
Large Fluctuation of
High Side * 2
Pressure fluctuation
amplitude of high-
pressure side is large.
AL.89
L LRG
Large Fluct L * 1
Large Fluctuation of
Low Side * 2
Pressure fluctuation
amplitude of low-
pressure side is large.
AL.89
A BLK
A Blocking * 1 , * 2 A Blocking (single-side
blockage) is detected.
AL. 91 * 3
P. SIM
P Simulate Mode Under Simulation Mode
for device variables.
Output the setting value of
Simulate-Value
Check Simulation
Mode
10
— AL.91 * 3
SP. SIM
SP Simulate Mode
AL.91 * 3
T. SIM
T Simulate Mode
*1: DD and DTM (excluding EJX HART 5 DTM based on FDT1.2)
*2: EJX HART 5 DTM based on FDT1.2
*3: Available only for HART 7