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
threshold.
See
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
threshold.
See
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
indefinitely.
run time for either condition, set
for the time that the ASD may output the
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
Note:
The
On (Electronic Switch)
setting allows for the availability of
the
Trip
(0) and
Alarm
ONLY.
Settings:
0 — Off
1 — On (Physical Switch)
2 — On (Electronic Switch;
Setting)
Direct Access Number — F483
Parameter Type —
Selection List
Factory Default —
Off
Changeable During Run —
Yes
Содержание P9
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