Q9 Plus ASD Installation and Operation Manual
157
Time-Based Alternation
Program
Virtual Linear Pump
Time-Based Alternation
This parameter is enabled for use by completing the
Virtual Linear Pump
Setup Wizard
.
Time-Based Alternation
operation is enabled by setting this parameter (
F417
)
to an operating mode and assigning a discrete input terminal to the
TBA HOA
Switch
function and activating the terminal.
During
Time-Based Alternation
operation, and while running in the
Virtual
Linear Pump
mode, this parameter
Enables/Disables
the ability of the system
to receive transducer input to manage system starts and stops as it pertains to
the process variable.
This parameter is also used to select the Lead ASD response (Stop or Start)
upon meeting the criteria of
F388
and
F389
settings.
Forward Auto
= Run the ASD while the measured signal is
F388
setting,
and stop the ASD upon reaching the
F389
setting.
Reverse Auto
= Run the ASD while the measured signal is
F389
setting, and
stop the ASD upon reaching the
F388
setting.
Settings:
0 — Off
1 — Forward Auto
2 — Reverse Auto
Direct Access Number — F417
Parameter Type —
Selection List
Factory Default —
Off
Changeable During Run —
Yes
Time-Based Alternation Period
Program
Virtual Linear Pump
Time-Based Alternation
During
Time-Based Alternation
operation, this parameter sets the time that the
Lead ASD and Lag ASD assignments are valid until changed as a function of
the
Time-Based Alternation
settings.
Direct Access Number — F418
Parameter Type —
Numerical
Factory Default —
1 Minute
Changeable During Run —
No
Minimum — 1 Minute
Maximum — 41 Days 15 Hours
(Time-Based Alternation) Pump Number
Program
Virtual Linear Pump
Time-Based Alternation
During
Time-Based Alternation
operation, this parameter is used to assign an
identifying number to an ASD/pump combination.
The identifying number is used to assign the virtual priority Lead and Lag
assignments.
The maximum number is limited to the user-assigned number at parameter
F437
.
Note:
This parameter is not associated with nor affected by the setting
of
F802
.
Direct Access Number — F434
Parameter Type —
Selection List
Factory Default —
1
Changeable During Run —
No
Minimum — 1
Maximum —
F437
Setting
WARNING
The Time-Based Alternation operating mode may result in the
unexpected Start or Stop of the motor. Signs to this effect are
to be posted at the location of the motor/pump.
F417
F434
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