166
Q9 Plus ASD Installation and Operation Manual
Virtual Linear Pump External Device Low Band Threshold
Program
Virtual Linear Pump
Run External Devices
During a properly configured
Virtual Linear Pump
operation, this parameter
establishes the upper limit of the
Virtual Linear Pump Minimum (Threshold)
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 External Device High Band Threshold
Program
Virtual Linear Pump
Run External Devices
This parameter sets the lower limit of the
Virtual Linear Pump Maximum
(Threshold)
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 Mode
Program
Virtual Linear Pump
Low Suction/No Flow Cut Off
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)
Direct Access Number — F483
Parameter Type —
Selection List
Factory Default —
Off
Changeable During Run —
Yes
F481
F483
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