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Figure 1.112
Shutdown Pump
Delta Level P3-05
System
Set-Point
0%
Auto Mode Run
OFF Mode
Multi-function
Output #40
Multi-function
Output #41
Start System
The pump system can be allowed to stabilize by programming a time into the Multiplex Stabilization Time (P3-11). The Multiplex
Stabilization Time (P3-11) becomes active after an auxiliary pump is staged or de-staged.
Note: The pump protection function is disabled during auxiliary pump staging and de-staging.
The No-Flow and Sleep functions are only active when the lead pump controlled by the drive is the only pump operating the pump
system.
P3-01 = 2: Output Frequency + Feedback Level
The "output frequency + feedback level" control method monitors the drive's output frequency and the difference between the system's
setpoint and feedback level to determine if the auxiliary pumps need to be staged (turned ON) to maintain the programmed system's
setpoint. The output frequency and the difference between the system's setpoint and feedback level also determine when the auxiliary
pumps are to be de-staged (turned OFF). Refer to
the "output frequency + feedback level" control method.
Auxiliary Pump Staging (ON)
The staging of auxiliary pump 2 occurs when the output frequency remains above the iQpump drive Multi/Maximum Level (P3-02) and
the difference between the system's setpoint and the feedback level exceeds the value programmed in the Add Pump Delta Level (P3-03)
for the time programmed in Add Pump Delay Time (P3-04).
The staging of auxiliary pump 3 occurs when the auxiliary pump 2 is staged and when the output frequency remains above the iQpump
drive Multi/Maximum Level (P3-02) and the difference between the system's setpoint and feedback level exceeds the value programmed
in the Add Pump Delta Level (P3-03) for the time programmed in Add Pump Delay Time (P3-04). Refer to
the auxiliary pumps using the "output frequency + feedback level" control method.
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
Shutdown Pump Delay Time
PUMP 1 + 2 + 3 RUNNING
Figure 118
Multiplex Stabilize Time
P3-11
Shutdown Pump Delay Time
P3-06
Shutdown Pump Delta Level
P3-05
REMOVE PUMP 3
Open Contact
Start System, Incoming Run Command
TIME
Figure 117
and
Figure 119
for the staging and de-staging of the auxiliary pumps using
Multiplex Stabilize Time
P3-11
P3-06
REMOVE PUMP 2
Open Contact
Figure 118
Feedback
for the staging of
147
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