Installation, Operation and Maintenance Manual
September 2019
MAN720_IMVS2000v2_IOM Rev. 6
Section 8: Table of Alarms
Table of Alarms
Alarm
Acronym
Composition
Squelched By (*) (**) (***)
Close High
Break Pressure
CHBP
Last “Maintenance Closing Break Pressure” is greater than the
“Baseline Closing Break Pressure” by more than “FST Pressure
Hysteresis”.
“M. Cl. B. P.” > “B. Cl. B. P.” * (1 + “FST Pr. %” /100)
A new Closing FST (without the above condition) resets this alarm.
•
“Al. CHBP En.” = “No”
•
“M. Cl. B. P.” = 0
•
“Reset Alarms” command
•
Power-on Reset
•
Calibration
•
Baseline Signature
Close Low
Break Pressure
CLBP
Last “Maintenance Closing Break Pressure” is lower than the
“Baseline Closing Break Pressure” by more than “PST Pressure
Hysteresis”.
“M. Cl. B. P.” < “B. Cl. B. P.” * (1 - “FST Pr. %” /100)
A new Closing FST (without the above condition) resets this alarm.
•
“Al. CLBP En.” = “No”
•
“M. Cl. B. P.” = 0
•
“Reset Alarms” command
•
Power-on Reset
•
Calibration
•
Baseline Signature
Pressure
Sensor 1
PS1
Failure of the Pressure Sensor 1.
It is cyclically check (period = 5 seconds).
•
“Pr. S. 1-2” = “None”
•
“Al. PS1 En.” = “No”
•
“Reset Alarms” command
•
Power-on Reset
Pressure
Sensor 2
PS2
Failure of the Pressure Sensor 2.
It is cyclically check (period = 5 seconds).
•
“Pr. S. 1-2” = “None”
•
“Act. Mode.” = “Single”
•
“Al. PS2 En.” = “No”
•
“Reset Alarms” command
•
Power-on Reset
Process
Pressure
Sensor
PPS
Failure of the Process Pressure Sensor.
It is cyclically check (period = 5 seconds).
•
“Proc. S.” = “None”
•
“Al. PPS En.” = “No”
•
“Reset Alarms” command
•
Power-on Reset
Position
Sensor
POS
Failure of the Position Sensor.
It is cyclically check (period = 5 seconds).
•
“Reset Alarms” command
•
Power-on Reset
Bus Card
BUS
Internal communication problems with the bus card.
It is cyclically check (period = 30 seconds).
•
“Al. BUS En.” = “No”
•
“Reset Alarms” command
•
Power-on Reset
Maintenance
MNT
The actual Date is greater than the “Next Maintenance Date”.
“Next Mnt Date” >= Actual Date
It is cyclically check (period = 30 seconds).
•
“Al. MNT En.” = “No”
•
“Reset Alarms” command
•
Power-on Reset
Calibration
CAL
“Cal. Status” ≠ “Passed”
If “Act. Mode”, “Open Rot.”, “Fail Action” or “SOVs Qty” have not
the same value they had during the last valid Calibration (“Cal.
Status” = “Passed”).
The status of this alarm is checked after every Power-on Reset and
every time the value of “Act. Mode”, “Open Rot.”, “Fail Action” or
“SOVs Qty” changes.
If this alarm is active is not possible to perform PST and Signatures.
Power On
Reset
POWER
It is not a real alarm; it is just logged in the “Alarms List” after a reset
(power cycle) of the device.
Nothing
Reset Alarm
RESET
It is not a real alarm; it is just logged in the “Alarms List” after using
the “Reset Alarms” command.
Nothing
Notes:
(*):
See Section 6 for details about IMVS2000v2 parameters.
(**):
The Cyclically Check alarms are not permanently squelched by the “Reset Alarms”
command and by the “Power on Reset”, if the alarm conditions keep existing, they
will be activated during the next check (see Section 5.2.7).
(***):
These PST alarms can be generated by the Baseline PST.
(****):
These FST alarms can be generated by the Baseline Signature.
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Summary of Contents for IMVS2000v2
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