YASKAWA iQpump1000 User Manual page 235

n P3-60: Pump 3 Frequency Shutdown Level
Sets the level at which the second lag pump (3rd pump in the system) will shut down or de-stage. This parameter is effective
when the P3-01 is set to 0 or 2 (pump staging is based on output frequency). When the output frequency falls below the P3-50
level for the time set in P3-09, the pump will be de-staged.
No.
P3-60
n P3-70: Pump 4 Frequency Shutdown Level
Sets the level at which the third lag pump (4th pump in the system) will shut down or de-stage. This parameter is effective
when the P3-01 is set to 0 or 2 (pump staging is based on output frequency). When the output frequency falls below the P3-50
level for the time set in P3-09, the pump will be de-staged.
No.
P3-70
n P4-01: Pre-Charge Level
Sets the level at which the drive will activate the pre-charge function. At start, if the PID is below the P4-01 setting, the drive
will run at the P4-02 frequency setting for the time set in P4-03. PID control is delayed until the Pre-charge function stops.
The drive will exit the pre-charge function early if the feedback rises above the P4-01 setting or if a Low Water digital input
switch (H1-oo = 8F) deactivates. Pre-charge is useful to slowly fill or pressurize a system.
No.
P4-01
n P4-02: Pre-Charge Frequency
Sets the frequency at which the pre-charge function will run.
No.
P4-02
n P4-03: Pre-Charge Time
Sets the duration of time that the pre-charge function will run.
No.
P4-03
The following conditions must be met to enter Pre-Charge Mode:
• Drive Ready or Sleeping (Run command, not faulted, not in program mode)
• NOT in HAND Mode
• "Disable Pre-Charge" digital input NOT closed
• P4-03 > 0.0
• If P4-01, Pre-Charge Level, is greater than 0, the PID feedback must be below the P4-01 level. (Forward acting PID, b5-09
= 0, Reverse acting PID, b5-09 = 1).
When the drive enters Pre-Charge Mode 1 and 2, the drive runs at the Pre-Charge frequency set in P4-02/P4-06, the PID
controller is disabled and the Pre-Charge digital output (H2-0o = A4) closes.
When pre-charge is active, the message "Pre Chg Mode Exit in Xsec" appears on the keypad to show how long before pre-
charge exits via timers (P4-03 + P4-07).
Additionally, during Pre-Charge Mode:
• When Pre-Charge Level 2 (P4-32) is set to 0, the system can exit Pre-Charge when the PID Feedback goes above the Pre-
Charge Level (P4-01) in normal PID operation, or below the P4-01 level in inverse PID operation.
However, when Pre-Charge Level 2 (P4-32) is set to a non-zero value, the system goes into Pre-Charge 2 instead when Pre-
Charge 1 completes via timer (P4-03) or level (P4-01). At this point, the drive will run at Pre-Charge Frequency 2 (P4-06).
The system can exit Pre-Charge 2 when the PID Feedback goes above the Pre-Charge Level 2 (P4-32) in normal PID
operation, or below the P4-32 level in inverse operation. Refer to
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
4.7 Basic iQpump Setup and Application Preset Parameters
Parameter Name
Pump 3 Frequency Shutdown Level
Parameter Name
Pump 4 Frequency Shutdown Level
Parameter Name
Pre-Charge Level
Parameter Name
Pre-Charge Frequency
Parameter Name
Pre-Charge Time
Setting Range
0.0 to 400.0
Setting Range
0.0 to 400.0
Setting Range
0.0 to 6000.0
Setting Range
0.0 to E1-04
Setting Range
0.0 to 3600.0 min
Figure 4.46 and Figure 4.47
Default
40.0 Hz
Default
40.0 Hz
Default
0.0 PSI
Default
0.0 Hz
Default
0.0 min
for more information.
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