BIFFI IMVS2000v2 - Page 74

September 2019
Installation, Operation and Maintenance Manual
MAN720_IMVS2000v2_IOM Rev. 6
MAN720_IMVS2000v2_IOM Rev. 6
Section 8: Table of Alarms
Table of Alarms
Alarm Acronym Composition Squelched By (*) (**) (***)
PST Low Break
Pressure
PSLB
Last “Manual PST Break Pressure” is lower than the “Baseline
PST Break Pressure” by more than “PST Pressure Hysteresis”.
“M. PST B. P.” < “B. PST B. P.” * (1 - “PST Pr. %” /100)
A new PST (without the above condition) resets this alarm.
• “Al. PSLB En.” = “No”
• “M. PST B. P.” = 0
• “Reset Alarms” command
• Power-on Reset
• Calibration
• Baseline Signature
• Baseline PST
PST High
Break Pressure
PSHB
Latest PST Break Pressure is greater than the “Baseline PST
Break Pressure” by more than “PST Pressure Hysteresis”.
“M. PST B. P.” > “B. PST B. P.” * (1 + “PST Pr. %” /100)
A new PST (without the above condition) resets this alarm.
• “Al. PSHB En.” = “No”
• “M. PST B. P.” = 0
• “Reset Alarms” command
• Power-on Reset
• Calibration
• Baseline Signature
• Baseline PST
PST Not
Moving
PSNM
(***)
The actuator/valve does not move during the last PST or
“B.PST Status” = “Conf. Err.” or “M.PST Status” = “Conf. Err.”
If “Fail Act.” = “CL”
It is active if during the PST it is not possible to reach at least the
position = 100% - “Op.Break Pos.”
If “Fail Act.” = “OP”
It is active if during the PST it is not possible to reach at least the
position = “Cl.Break Pos.”
A new PST (without the above conditions) resets this alarm
• “Reset Alarms” command
• Power-on Reset
• Calibration
• Baseline Signature
PST SOV A
PSA
(***)
The test of the SOVA during the PST does not cause a variation
of the pressure or a failure is verified during “SOV A TEST” or
“SOV A – SOV B TEST.”
It is automatically reset when a PST (with the SOV B test) or a
“SOV A TEST” or a “SOV A – SOV B TEST” is performed.
See Sections 5.1.6 and 5.1.9 for details.
• “Pr. S. 1-2” = “None”
• “Act.Mode” = “Double”
• “SOVs Qty” ≠ “Series”
• “PST Ser. SOVs” = “One”
• “Al. PSA En.” = “No”
• “Reset Alarms” command
• Power-on Reset
• Calibration
• Baseline Signature
PST SOV B
PSB
(***)
If “SOVs Qty” = “Series”
The test of the SOVB during the PST does not cause a variation
of the pressure.
It is automatically reset when the PST, with the SOVA test, is
performed.
Else if “SOVs Qty” = “Simplex”
The test of the SOVB during SOV TEST does not cause a varia-
tion of the pressure or a failure is verified during a “SOV A – SOV
B TEST”.
It is automatically reset when a new SOVs TEST is performed.
See Sections 5.1.6 and 5.1.9 for details.
• “Act.Mode” = “Double”
• “SOVs Qty” = “Parallel”
• “PST Ser. SOVs” = “One”
• “PST En.” = “No”
• “Al. PSB En.” = “No”
• “Reset Alarms” command
• Power-on Reset
• Calibration
• Baseline Signature
SIS A not
present
SISA
Loss of power supply dedicated to SOV A.
It is cyclically check (period = 30 seconds).
The check is interrupted during Calibration, Signatures and PST
executions.
• “Al. SISA En.” = “No”
• “Reset Alarms” command
• Power-on Reset
SIS B not
present
SISB
Loss of power supply dedicated to SOV B.
It is cyclically check (period = 30 seconds).
The check is interrupted during Calibration, Signatures and PST
executions.
• “Al. SISB En.” = “No”
• “Act. Mode” ≠ “Double” AND
“SOVs Qty” = “Simplex”
• “Reset Alarms” command
• Power-on Reset
Open Position
Out Of Range
OPOS
In case of “Position Request” = 100%:
the actual position differs from the Position Request (100%) by
more than the “Open Position Hysteresis” (“Op. Pos. %”).
abs (Actual Position – 100%) > “Op. Pos. %”
It is cyclically check (period = 30 seconds).
The check is interrupted during Calibration, Signatures, FST and
PST executions.
• “Al. OPOS En.” = “No”
• “Reset Alarms” command
• Power-on Reset
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