Yaskawa iQpump Programming Manual - Manual (Page 136)

136 YASKAWA TM.iQp.02 iQpump Drive Programming Manual
Figure 1.103
Figure 108
Total setpoint compensation can be monitored with Total Setpoint Compensation (U1-93).
■ P2-09 Setpoint Compensation
Setting Range: 0.0 to 6000.0
Factory Default: 0.0
The iQpump drive can automatically increase the setpoint each time the maximum number of cycles programmed in Sleep Mode:
Cycling Protection (P2-06). The units for this parameter are determined by the System Units (P1-02).
Refer to Over-Cycling Mode: (P2-08 = 3: Auto Compensation) for further description.
■
P2-10 Maximum Setpoint Compensation
Setting Range: 0.0 to 6000.0
Factory Default: 0.0
The iQpump drive can set the maximum allowable setpoint compensation during an over-cycling condition by the value programmed in
Maximum Setpoint Compensation (P2-10). The units for this parameter are determined by the System Units (P1-02).
Refer to Over-Cycling Mode: (P2-08 = 3: Auto Compensation) for further description.
■
P2-11 No-Flow Activation Level
Setting Range: 0 to 24000 RPM
Factory Default: 0 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 detection is active when the motor is operating below this No-Flow Activation Level (P2-11) and below the No-Flow Detection
Bandwidth (P2-12).
Setting P2-11 to a value of 0 will disable this function. This function is only active during operation in the Auto Mode and when the drive
is operating above the Minimum Pump Frequency (P1-06) and below the level programmed in P2-11.
Note: Program Start Level (P1-04) to a value greater than 0.
The No-Flow Activation Level (P2-11) works in conjunction with the No-Flow Detection Bandwidth (P2-12).
No-Flow Detection Basic Operation
The iQpump drive can be configured for a no-flow detection condition. The no-flow detection function of the iQpump drive is an
advanced feature for all pumping applications. The typical applications for this function are submersible and booster station pumps.
TIME
System Running Auto Mode
Auto Mode Run
Sleep Mode
AUTO MODE
RUN
AUTO MODE
RUN
AUTO MODE
RUN
SLEEP SLEEP
Cycle Count
Register
Cycle
Count = 1
Cycle
Count = 2
P2-06 Max. Cycle = 3
P2-09 Set-Point Comp = 1.0
P2-10 Max. SP Comp. = 10.0
Cycle
Count = 0
Cycle
Count = 1
Maximum cycle count exceeded,
Increase Set-Point with Value of P2-09.
Total Compensation not to exceed P2-10
SLEEP
Cycle
Count = 3
Cycle
Count = 2
INCR. SET-POINT by P2-09