GX9 ASD Installation and Operation Manual 215
Virtual Linear Pump External Device Low Band
Virtual Linear Pump Run External Devices
During a properly configured Virtual Linear Pump operation, this parameter
establishes the upper limit of the Minimum Threshold Zone.
See F931 for more information on this parameter.
Direct Access Number — F932
Parameter Type — Numerical
Factory Default — 10.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 30.00
Virtual Linear Pump External Device High Band
Virtual Linear Pump Run External Devices
During a properly configured Virtual Linear Pump operation, this parameter
establishes the lower limit of the Maximum Threshold Zone.
See F931 for more information on this parameter.
Direct Access Number — F933
Parameter Type — Numerical
Factory Default — 10.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 30.00
Virtual Linear Pump Low Suction/No-Flow Cut Off Mode
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 F936
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 F936.
Note: The On (Electronic Switch) setting allows for the availability of
the Trip (0) and Alarm (1) selections at F935 ONLY.
Settings:
0 — Off
1 — On (Physical Switch)
2 — On (Electronic Switch; F936 Setting)
Direct Access Number — F934
Parameter Type — Selection List
Factory Default — Off
Changeable During Run — Yes
F932 F934
To Next Page
Loading...
