P9 ASD Installation and Operation Manual 173
(Virtual Linear Pump) Low Band Threshold
Virtual Linear Pump Low Band Threshold
During a properly configured Virtual Linear Pump operation, this parameter
establishes the upper limit of the
(Virtual Linear Pump) Minimum threshold.
See F480 for additional information on this parameter.
Direct Access Number — F481
Parameter Type — Numerical
Factory Default — 10
Changeable During Run — Yes
Minimum — 0
Maximum — 30
(Virtual Linear Pump) High Band Threshold
Virtual Linear Pump High Band Threshold
This parameter sets the lower limit of the (Virtual Linear Pump) Maximum
threshold.
See F480 for additional information on this parameter.
Direct Access Number — F482
Parameter Type — Numerical
Factory Default — 10
Changeable During Run — Yes
Minimum — 0
Maximum — 30
(Virtual Linear Pump) Low Suction/No-Flow Cut Off
Pressure Mode
Virtual Linear Pump Low Suction Pressure Mode
This parameter is used to halt the ASD in the event of the loss of feed water to
the pump or if there is a closed output valve at the pump output.
A low-pressure suction switch may be used to detect the loss of feed water by
opening or closing a circuit in the event of feed water loss. The switch state
change would result in the activation of a discrete input terminal (set to Low
Suction/No Flow Protection) resulting in an AbFL trip.
Either a closed output valve or a suction pressure loss will result in the ASD
running at the
Upper-Limit Frequency indefinitely.
To monitor the Upper-Limit Frequency run time for either condition, set F484
for the time that the ASD may output the Upper-Limit Frequency continuously
before the system initiates an AbFL trip.
Set this parameter to On (Physical Switch) if using a discrete input terminal for
detection.
Set this parameter to On (Electronic Switch) if using the Upper Limit run-
time for detection — set the run-time limit at
F484.
Note: The On (Electronic Switch) setting allows for the availability of
the Trip (0) and Alarm (1) selections at
F450 ONLY.
Settings:
0 — Off
1 — On (Physical Switch)
2 — On (Electronic Switch; F484 Setting)
Direct Access Number — F483
Parameter Type — Selection List
Factory Default — Off
Changeable During Run — Yes
F481 F483
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