Yaskawa iQpump1000 AC Drive Quick Start - Manual (Page 189)

Start Up Procedure for iQpump1000 with Three Lag Pumps
1.
Set parameter A1-03 to 6011 (VTC Pressure Control). This will preset parameter values for this application.
2.
Set the motor-rated current in parameter E2-01. This information can be found on the motor nameplate or specification
sheet.
3.
Set the number of motor poles in parameter E2-04 (2-pole motors have a rated RPM of slightly less than 3600 RPM;
4-pole motors have a rated RPM of slightly less than 1800 RPM). This information can be found on the motor
nameplate or specification sheet.
4.
Set the feedback device scaling in parameter P1-03. Check the sensor nameplate or specification sheet. For example,
if the device outputs 20 mA at 100.0 PSI of pressure, then set P1-03 to 100.0 PSI. The drive controller will automatically
scale all associated parameters and monitors. Monitor U1-91 (Pump Feedback) will display the measured pressure
in PSI. The drive has a High Feedback Fault set in parameter P1-11. Make sure that P1-11 is appropriately set for
sensor scaling in P1-03.
5.
Set the desired pressure setpoint in parameter Q1-01 (PI setpoint). This is desired pressure that the drive will regulate
the pump to control around. To quickly access this parameter, press the HOME key and then the ENTER key. The
U1-99 monitor on the home screen displays the Q1-01 PI setpoint.
6.
Set the minimum speed that the pump can be run in parameter P1-06. The default is 35 Hz. This information can be
found on the pump specification sheet.
7.
The default setting is for the drive to control the pump motor wired to the drive. Additional Lag pumps can be added
to the system by wiring the on/off switch of the lag-pump motor to the drive as shown in the figure above. Set parameter
P1-01 to 1 (Contactor Lag). This will enable the multiplexing control for multiple pumps
8.
Set the number of additional lag pumps in parameter P3-00. For example, for a system with the drive pump and 3
additional lag pumps, set P3-00 to 3.
9.
Set each lag pump’s shutdown (stage off) level in Parameters P3-50, P3-60 and P3-70. The value is set in Hz. The
setting tells the drive controller to de-stage the lag pump if the output frequency drops below this level. This setting
needs to be coordinated with minimum pump speed (P1-06) and the sleep level. It is important that all lag pumps be
de-staged above the sleep level or the drive will not enter sleep mode
10.
The drive will stage lag pumps on based on the output frequency of the drive. At start, only the drive pump will be
running. If the drive output frequency reaches 60 Hz for the time set in P3-05 and the pressure setpoint cannot be
met, the drive will stage on (turn on) one of the lag pumps. The drive will stage on additional lag pumps until the
pressure setpoint can be achieved.
11.
The drive will stage lag pumps off based on the output frequency of the drive. Assume the system has been running
with multiple lag pumps on. Now the demand starts to drop. The drive’s output frequency will drop. If the output
frequency falls below a lag pump frequency shutdown level for the time set in P3-09, the pump is de-staged. The drive
will continue to de-stage pumps until the pressure setpoint can be met
12.
Configure the sleep function. The drive can be programmed to shut off or sleep if the pressure stays at or above the
Q1-01 setpoint with all lag pumps de-staged and the drive running at the minimum pump speed. In order to turn on
the sleep function, set parameter P1-04 (Start – Draw Down Level) to a level slightly less than the pressure Q1-01
setpoint. When the drive is sleeping and the system pressure drops below the P1-04 setting, the drive will wake up
and begin regulating pressure again. By sleeping, the drive will save energy and mechanical wear. A setting of zero
in P1-04 will disable the sleep function (default setting).
13.
Press the AUTO key to start the drive with PI control (pressure control). Press the OFF key to stop the drive
4.5 iQpump Presets and Functions
YASKAWA TOEP YAIP1W 01B YASKAWA AC Drive - iQpump1000 Quick Start Guide 189
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Start-Up Programming & Operation