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P3 Pump Protection
P3-01 Lead-Lag Control
■
Setting
0
1
2
The iQpump drive can be configured for lead-lag control. The lead-lag control refers to the drive (lead) controlling a pump and turning on
auxiliary pumps (lag) by the drive's output contacts. The controlling of the auxiliary pumps is referred to staging and de-staging. Up to
three (3) total pumps can be operated, one lead (drive control) and two auxiliary pumps. The pump control staging and de-staging can be
controlled by three (3) different lead-lag control methods.
0: Output Frequency
1: Feedback Level
2: Output Frequency + Feedback Level
P3-01 = 0: Output Frequency
The "output frequency" control method monitors the drive's output frequency and determines if the auxiliary pumps need to be staged
(turned ON) to maintain the programmed system's setpoint. The output frequency also determines when the auxiliary pumps are to be de-
staged (turned OFF). Refer to
frequency" 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) 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 the output frequency remains above the iQpump drive
Multi/Maximum Level (P3-02) for the time programmed in Add Pump Delay Time (P3-04). Refer to
auxiliary pump 2 and 3 using the "output frequency" control method.
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
Output Frequency ( factory default )
Feedback Level
Output Frequency + Feedback Level
Figure 114
and
Figure 115
Description
for the staging and de-staging of the auxiliary pumps using the "output
Parameters Used
P3-02, P3-04, P3-09, P3-10
P3-03, P3-04, P3-05, P3-06
P3-02, P3-03, P3-05, P3-06, P3-07, P3-08, P3-10
Figure 114
for the staging of the
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