Yaskawa iQpump Controller Programming Manual - Manual (Page 183)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 183
The iQpump drive can be configured for multiplex pumping operation. A time delay can be programmed to allow the system to stabilize
when a pump is staged (turned ON) or de-staged (turned OFF). The time used for system stabilization is programmed into the Multiplex
Stabilization Time (P3-11). When a pump is staged (turned ON), the stabilization time (P3-11) temporarily disables the lead / lag
functionality during this time period to prevent pump cycling.
This function is only active when the Pump Mode (P1-01 > 0) is greater than 0.
Refer to Lead-Lag Control (P3-01) for more details.
Note: The pump protection and lead-lag control are suspended during this time period.
Figure 1.133
Figure 137.
◆ P3-12 Delta Setpoint Feedback Acc / Dec Changeover
Setting Range: 0.0 ~ 6000.0
Factory Default: 0.0
The iQpump drive can be configured for multiplex pumping operation. The acceleration (Acc) and deceleration (Dec) times can be
changed when the difference between the delta setpoint and feedback are within the programmed level in the Delta Setpoint Feedback
Acc / Dec Changeover (P3-12).
The acceleration and deceleration times during this changeover are programmed into C1-05 and C1-06, respectively.
This function is used to improve the pump regulation.
TIME
Output Frequency
Add Pump Delay Time P3-04
Feedback
Auto Mode Run
Multi-function
Output #40
Wait for Start
Max-Multi Level
P3-02
STOP, 0Hz
0%
OFF Mode
Start Level
P1-04
ADD PUMP 2
AUTO MODE RUN:
Start System, Incoming Run Command
Start System
Start Level Delay
P1-05
START DELAY
System
Set-Point
Add Pump Delay Time
P3-04
Multi-function
Output #41
ADD PUMP 3
PUMP 1
Multiplex Stabilize Time
P3-11
Multiplex Stabilize Time
P3-11 Lead/Lag Functions
Disabled until
stabilization timer
expires