Yaskawa iQpump Controller Programming Manual - Manual (Page 179)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 179
◆ P3-03 Add Pump Delta Level
Setting Range: 0.0 ~ 6000.0
Factory Default: 0.0
The delta level used for the staging of the multiplex pumping operation is programmed in the Add Pump Delta Level (P3-03). The staging
of the multiplex pumping operation is determined by the programmed setting of P3-01 as described below.
■
If P3-01 = 0: Output Frequency (P3-03: Not used)
The Add Pump Delta Level (P3-03) is not used when Lead-Lag Control (P3-01) is set to 0.
■
If P3-01 = 1: Feedback Level
The staging (turning ON) of the auxiliary pump occurs when the difference (delta) 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).
■ If P3-01 = 2: Output Frequency + Feedback Level
The staging (turning ON) of the auxiliary pump occurs when the output frequency rises above the level programmed in the iQpump drive
Multi / Maximum Level (P3-02) and the difference (delta) 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).
The units for this parameter are based on P1-02. Refer to Lead-Lag Control (P3-01) for further description of the staging of the pump
system.
◆ P3-04 Add Pump Delay Time
Setting Range: 0 ~ 3600 s
Factory Default: 2 s
The staging (turning ON) of the auxiliary pumps will occur after the time delay programmed in the Add Pump Delay Time (P3-04) has
elapsed. The time delay will occur prior to the staging of the auxiliary pumps.
The Add Pump Delay Time (P3-04) works in conjunction with iQpump drive Multi / Maximum Level (P3-02), Add Pump Delta Level
(P3-03), No-Flow Activation Level (P2-11) and No-Flow Feedback Detection Direction (P2-19).
Refer to Lead-Lag Control (P3-01) for further description of the staging of the pump system.
◆ P3-05 Shutdown Pump Delta Level
Setting Range: 0.0 ~ 6000.0
Factory Default: 0.0
The delta level used for the de-staging of the multiplex pumping operation is programmed in the Shutdown Pump Delta Level (P3-05).
The de-staging of the multiplex pumping operation is determined by the programmed setting of P3-01 as described below.
■ If P3-01 = 0: Output Frequency (P3-05: Not used)
The Shutdown Pump Delta Level (P3-05) is not used when Lead-Lag Control (P3-01) is set to 0.
CAUTION
Do not program this level too close to the system’s setpoint.
If the level is too close to the setpoint, excessive cycling of the pump system may occur.