YASKAWA iQpump Series Programming Manual page 153

Figure 1.116
P3-09 Pump 2 Frequency Shutdown Level
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Setting Range: 0.0 to 120.0 Hz
Factory Default: 35.0 Hz
The Pump 2 shutdown frequency level used for the multiplex pumping operation (de-staging) is programmed in the Pump 2 Frequency
Shutdown Level (P3-09). The Pump 2 Frequency Shutdown Level (P3-09) is active when the Lead-Lag Control (P3-01) is set to 0 or 2.
The multiplex pumping operation (de-staging) is determined by the programmed setting of P3-01 as described below.
If P3-01 = 0: Output Frequency
The de-staging (turning OFF) of the auxiliary pump occurs when the output frequency falls below the Pump 2 Frequency Shutdown
Level (P3-09) for the time programmed in the Shutdown Pump Delay Time (P3-06).
The auxiliary pumps will be removed by the control of the multi-function digital output contact opening (H2-xx = 40 and 41).
If P3-01 = 1: Feedback Level (P3-02: Not Used)
The Pump 2 Frequency Shutdown Level (P3-09) is not used when Lead-Lag Control (P3-01) is set to 1.
If P3-01 = 2: Output Frequency + Feedback Level
The de-staging (turning OFF) of the auxiliary pump occurs when the output frequency falls below the Pump 2 Frequency Shutdown
Level (P3-09) and the difference between the feedback minus the system's setpoint has exceeded the Shutdown Pump Delta Level (P3-
05) for the time programmed in the Shutdown Pump Delay Time (P3-06).
The auxiliary pumps will be removed by the control of the multi-function digital output contact opening (H2-xx = 40 and 41).
Refer to Lead-Lag Control (P3-01) for further description of the de-staging of the pump system.
P3-10 Pump 3 Frequency Shutdown Level
■
Setting Range: 0.0 to 120.0 Hz
Factory Default: 35.0 Hz
The Pump 3 shutdown frequency level used for the multiplex pumping operation (de-staging) is programmed in the Pump 3 Frequency
Shutdown Level (P3-10). The Pump 3 Frequency Shutdown Level (P3-10) is active when the Lead-Lag Control (P3-01) is set to 0 or 2.
The multiplex pumping operation (de-staging) is determined by the programmed setting of P3-01 as described below.
If P3-01 = 0: Output Frequency
The de-staging (turning OFF) of the auxiliary pump occurs when the output frequency falls below the Pump 3 Frequency Shutdown
Level (P3-10) for the time programmed in the Shutdown Pump Delay Time (P3-06).
The auxiliary pumps will be removed by the control of the multi-function digital output contact opening (H2-xx = 40 and 41).
YASKAWA TM.iQp.02 iQpump Drive Programming Manual
SET-POINT
Set-Point - P3-08
PUMP 1 PUMP 1 + 2
Set-Point - 2 x P3-08
Set-Point - P3-08
PUMP 1 + 2 + 3 PUMP 1 + 2
Time
Figure 121
PUMP 1
153