Yaskawa iQpump Controller Programming Manual - Manual (Page 185)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 185
◆ P3-14 Maximum Friction Increase at Maximum Frequency
Setting Range: 0.0 ~ 6000.0
Factory Default: 0.0
The iQpump drive can be configured for multiplex pumping operation. The pump system may experience an increase of friction when
additional pumps are staged (turned ON). The level when the additional compensation for friction losses can be programmed into the
Maximum Friction Increase at Maximum Frequency (P3-14). This function will activate when the output frequency rises above the
Friction Compensation Start Frequency (P3-13). The maximum compensation at Maximum Output Frequency (E1-04) is specified by the
Maximum Friction Increase at Maximum Frequency (P3-14).
Figure 1.135
Figure 139.
The maximum compensation at Maximum Output Frequency (E1-04) is specified by programming the Maximum Friction Increase at
Maximum Frequency (P3-14).
The Maximum Friction Increase at Maximum Frequency (P3-14) works in conjunction with the Friction Compensation Start Frequency
(P3-13). The units for this parameter are determined by the System Units (P1-02).
Note: This function is only active when the Pump Mode (P1-01) is set to 0.
Example:
If P3-13 = 30.0 Hz, P3-14 = 10.0 psi, Output Frequency = 45.0 Hz, and Maximum Frequency = 60 Hz, then:
Setpoint Increase = 5.0 psi
(45.0 - 30.0 Hz) x (10 psi / (60.0-30.0 Hz)) = 5.0 psi
OUTPUT
FREQUENCY
P3-13
Time
SET-POINT
P3-14
FMAX
Friction
Compensation
P3-13