Yaskawa iQpump Programming Manual - Manual (Page 139)

YASKAWA TM.iQp.02 iQpump Drive Programming Manual 139
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P2-12 No-Flow Detection Bandwidth
Setting Range: 0 to 1000 RPM
Factory Default: 15 RPM
The iQpump drive can be configured to activate a no-flow detection by programming the No-Flow Activation Level (P2-11). The no-
flow activation can have a programmed bandwidth before the no-flow condition is activated by programming the No-Flow Detection
Bandwidth (P2-12).
The No-Flow Detection Bandwidth (P2-12) sets the motor RPM fluctuation bandwidth. The no-flow detection activates when the motor
RPM is below the No-Flow Activation Level (P2-11) and remains within the programmed No-Flow Detection Bandwidth (P2-12) for a
time specified by the No-Flow Detection Time (P2-13).
The No-Flow Detection Bandwidth (P2-12) works in conjunction with the No-Flow Activation Level (P2-11).
Refer to the No-Flow Activation Level (P2-11) for further description.
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P2-13 No-Flow Detection Time
Setting Range: 0.0 to 1000.0 sec
Factory Default: 5.0 sec
The iQpump drive can be configured to activate a no-flow condition by programming the No-Flow Activation Level (P2-11) and No-
Flow Detection Bandwidth (P2-12). The no-flow detection activates when the motor RPM remains within the programmed bandwidth
(P2-12) for a time programmed in the No-Flow Detection Time (P2-13).
The No-Flow Detection Time (P2-13) works in conjunction with the No-Flow Detection Bandwidth (P2-12) and the No-Flow Feedback
Level (P2-15).
Refer to the No-Flow Activation Level (P2-11) for further description.
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P2-14 No-Flow Stabilization Time
Setting Range: 0.0 to 1000.0 sec
Factory Default: 5.0 sec
The iQpump drive can be configured to activate a no-flow detection by programming the No-Flow Activation Level (P2-11). When the
no-flow detection is activated, the system setpoint will be lowered by the value programmed in the No-Flow Setpoint Compensation (P2-
16) for a specific time as programmed by the No-Flow Stabilization Time (P2-14). After the time programmed in P2-14 has elapsed, the
system setpoint will return to the original setting.
The No-Flow Stabilization Time (P2-14) works in conjunction with the No-Flow Setpoint Compensation (P2-16).
Refer to the No-Flow Activation Level (P2-11) for further description.
■ P2-15 No-Flow Delta Feedback Level
Setting Range: 0.0 to 6000.0
Factory Default: 1.0
The iQpump drive can be configured to activate a no-flow detection by programming the No-Flow Activation Level (P2-11). When the
no-flow detection is activated, the feedback level is monitored and compared to the system setpoint. If the difference between the system
setpoint and the feedback level exceeds the No-Flow Delta Feedback Level (P2-15) for a time specified by the No-Flow Feedback Delay
Time (P2-17), the drive will enter a “sleep” mode.
The No-Flow Delta Feedback Level (P2-15) works in conjunction with the No-Flow Feedback Delay Time (P2-17). The units for this
parameter are determined by the System Units (P1-02).
Refer to the No-Flow Activation Level (P2-11) for further description.
Note: The feedback detection direction can be selected by programming No-Flow Feedback Detection Direction (P2-19).