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Yokogawa EJA440E User Manual

Page 73

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<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

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