YASKAWA iQpump1000 Quick Start Manual page 135

No.
P1-11 High Feedback Level
P3-00 Number of Lag Pumps
P3-05 Add Pump Delay Time
P3-09 Shutdown Pump Delay Time
P3-50 Pump 2 Frequency Shutdown Level
P3-60 Pump 3 Frequency Shutdown Level
P3-70 Pump 4 Frequency Shutdown Level
P5-02 HAND Reference
P5-04 HAND Key Function Selection
Q1-01 PID Controller Setpoint 1
U1-91) Pump Feedback
U1-99 Anti-No-Flow Timer
n Pre-Charge Function with One Lag Pump
The pre-change function is designed to start a pumping system in a controlled manner. Rather than turning on the PI loop
immediately at start up, the pre-charge function operates at a fixed speed to pre-fill the piping or storage tank before switching
to PID control. This prevents the PI loop integrator from building up unnecessarily and also allows for a soft pressurization
and fill of the system.
When an "auto" run command is issued or when waking up from the sleep state, the drive will check to see if it should perform
a pre-charge operation. If so, it will ramp up and run at the pre-charge frequency. Some of the pump protective functions are
disabled during pre-charge operation.
The drive will exit the pre-charge function when any of the below conditions are met:
• The process feedback level reaches the pre-charge level (P4-01)
• A multi-function digital input programmed for a Low Water Level switch deactivates (H1-oo = 8F)
• The pre-charge timer expires (P4-03).
Required Control Wiring
No control wiring is required. An optional Low Water Level switch can be used to turn off the pre-charge function. Wire the
switch into one the drive digital inputs and program the corresponding H1-oo parameter to 8F (the switch is normally open
and closes during low water level).
Start Up Procedure
1.
Set all other parameters required for the application such as PI control loop, sleep, motor, and I/O parameters.
However, this function can be used in conjunction across a wide range of applications using a PI control process loop.
2.
Set the pre-charge level in parameter (P4-01). This is the process feedback level (PSI, depth, etc.) that must be
achieved before the pre-charge function will turn off.
3.
Set the pre-charge frequency reference in parameter P2-02. This is the frequency that the drive will run at during pre-
charge. Set this value to reasonable speed that is above the minimum pump speed (P1-06) and close to the average
running frequency of the drive controller.
YASKAWA TOEP YAIP1W 01A YASKAWA AC Drive - iQpump1000 Quick Start Guide
Parameter Name
4.5 iQpump Presets and Functions
Setting Values
Default: 0.0 PSI
Min.: 0.0
Max.: 6000.0
Default: 1
Min.: 1
Max.: 5
Default: 2 s
Min.: 0
Max.: 3600
Default: 5 s
Min.: 0
Max.: 3600
Default: 40.0 Hz
Min.: 0.0
Max.: 400.0
Default: 40.0 Hz
Min.: 0.0
Max.: 400.0
Default: 40.0 Hz
Min.: 0.0
Max.: 400.0
Default: 40.0 Hz
Min.: 0
Max.: [E1-04]
Default: 1
Range: 0, 1
Default: 0.0
Min.: 0.0
Max.: 6000.0
No signal output available
No signal output available
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