Yokogawa EJX930A - Manual (Page 169)

<Appendix 8. Advanced Diagnostics>
A8-19
IM 01C25R03-01E
Checklist (3/5)
Go to the following step according to the result of "Invalid Ref xx" shown in the DIAG_ERR of 8th check item.
DIAG_ERR (Index: F2086)
Check item
Invalid Ref fSPh Invalid Ref fSPl Invalid Ref fdP
    10-a
    10-b
 : The alarm is generated.

: The alarm is not generated.
No. Items Parameters Result Example
10-a Simulation of Blockage detection
operation
• High Side Blocking: 10-a-1
• Low Side Blocking: 10-a-2
• Both Side Blocking: 10-a-3
10-a-1 High Side Blocking
• Close the high-pressure side valve
completely.
• Record the values of VALUE_# after
the certain time, (DIAG_PERIOD ×
DIAG_COUNT), passed.
*: Record the value after checked that
the status is “GOOD”.
VALUE_FDP (Index: 2103)* 7.48562e-9
VALUE_FSPL (Index: 2104) * 7.23277e-9
VALUE_FSPH (Index: 2105) * 7.14085e-9
VALUE_BLKF (Index: 2106) -0.287259
• Record the status of Checkbox in
DIAG_OPTION.
• Check that the alarms status of “A
Blocking” and “High Side Blocking”
are set.
Note: If the alarm of “Outside Diagnosis
Range” is generated, the valve may
be closed too much tightly. Open
valve a little and record the updated
status of the parameters.
DIAG_OPTION (Index: 2089)
A Blocking  
Large Fluctuation of Low Side  
Large Fluctuation of High Side  
Low Side Blocking  
High Side Blocking  
B Blocking  
Invalid Ref BlkF  
Invalid Ref fSPh  
Invalid Ref fSPl  
Invalid Ref fDP  
Outside Diagnosis Range  
Reflect Blockage to PV/SV/TV
Status
 
• Check that the alarm of “High Side
Blocking” is generated.
• Check that the alarm of “Low Side
Blocking” is not generated.
DIAG_ERR (Index: 2086)
High Side Blocking  
Low Side Blocking  