YASKAWA iQpump Series Programming Manual page 149

Figure 1.114
Pump 2 & 3
Frequency
Shutdown Level
P3-09, P3-10
Shutdown Pump
Delta Level P3-05
System
Set-Point
0%
Auto Mode Run
OFF Mode
Multi-function
Output #41
Multi-function
Output #40
Start System
P3-02 Drive Multi/Maximum Level
■
Setting Range: 0.0 to 120.0 Hz
Factory Default: 59.0 Hz
The maximum frequency level used for the multiplex pumping operation (staging) is programmed in the iQpump drive Multi/Maximum
Level (P3-02) is active when the Lead-Lag Control (P3-01) is set to 0 or 2. The multiplex pumping operation (staging) is determined by
the programmed setting of P3-01 as described below.
If P3-01 = 0: Output Frequency
The staging (turning ON) of the auxiliary pump occurs when the output frequency rises above the iQpump drive Multi/Maximum Level
(P3-02) for the time programmed in the Add Pump Delay Time (P3-04). The auxiliary pumps will be added by the control of the multi-
function digital output contact closure (H2-xx = 40 and 41).
If P3-01 = 1: Feedback Level (P3-02: Not Used)
The iQpump drive Multi/Maximum Level (P3-02) is not used when Lead-Lag Control (P3-01) is set to 1.
If P3-01 = 2: Output Frequency + Feedback Level
The staging (turning ON) of the auxiliary pump occurs when the output frequency rises above the iQpump drive Multi/Maximum Level
(P3-02) and the difference between the system's setpoint minus the feedback level has exceeded the Add Pump Delta Level (P3-03) for
the time programmed in the Add Pump Delay Time (P3-04).
The auxiliary pumps will be added by the control of the multi-function digital output contact closure (H2-xx = 40 and 41).
Refer to Lead-Lag Control (P3-01) for further description of the staging of the pump system.
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
Multiplex Stablize Time
Output Frequency
Shutdown Pump Delay
Time P3 - 06
PUMP 1 + 2 + 3 RUNNING
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 119
Multiplex Stablize Time
P3-11
Feedback
REMOVE PUMP 2
Open Contact
149