Yaskawa iQpump1000 AC Drive Quick Start - Manual (Page 171)

4.5 iQpump Presets and Functions
u iQpump Presets
n Pump Down Level Control Application Preset
This preset allows the drive to regulate the depth of water in a tank or other vessel that is being filled by an external source.
A feedback device that measures water depth is wired to the drive. A PI-control process loop will then modulate the pump
speed to pump water out the tank to keep the water depth the setpoint level (pump out at the recharge rate). The drive controller
has an application preset to simplify the start up and control of this application.
• System units are in feet (P1-02 = 6).
• Feedback device scaling (P1-03). The feedback device scaling must be entered into the drive for proper control.
• Minimum pump speed (P1-06). Most pumps cannot be run below a certain speed or cavitation can occur.
• Number of Motor Poles (E2-02). The default is for a 2-pole motor.
• Sleep Function. The drive controller will sleep when the system demand is low and awaken when demand returns.
Required Control Wiring
Most depth level transducers have current-based feedback (4-20 mA). The A2 terminal of the drive is preset for 4-20 mA and
pre-programmed for PI feedback (H3-10 = B). If the sensor is voltage based (0-10 V) and terminal A3 is unused, then wire
the transducer to terminal A3 and program H3-10 to F (A2 not used) and H3-06 to B (A3 PI Feedback).
Start Up Procedure
1.
Set parameter A1-03 to 6009 (Pump Down Level) to pre-set 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 14.50 ft of water depth, the set P1-03 to 14.50. The drive controller will automatically
scale all associated parameters and monitors. Monitor U1-91 (Pump Feedback) will display the measured water depth
in feet. 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 water depth level in parameter Q1-01 (PI setpoint). This is desired water depth that the drive will
regulate the pump speed 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 40 Hz. This information can be
found on the pump specification sheet.
7.
The default settings will allow the drive to automatically restart after power loss if the drive was running at the time of
power loss. To disable, set P4-10 to 1.
8.
Press the AUTO key to start the drive with PI control (water depth control). Press the OFF key to stop the drive.
9.
The pump can be run in a Hand (local) mode for maintenance purposes by pressing the HAND key while the drive is
stopped. The HAND key acts as a start button. Press the OFF button to stop the drive. Press AUTO to return the drive
to PI control. The HAND speed reference can be set in P5-02 (Hand Reference 1). Disable the HAND key by setting
P5-04 to 0 (disabled).
10.
Configure the sleep function. The pump can be programmed to shut off or “sleep” if the water falls below the depth
set in parameter P2-02 (Sleep Level). The controller will monitor the water depth feedback signal and wake up when
the water depth rises above the setting in parameter P1-04 (Start – Draw Down Level). Logically, set the Sleep Level
(P2-02) lower than the PI setpoint and set the Draw Down Level (P1-04) slightly above the PI setpoint. This way the
drive won’t wake up until the water has already exceeded the desired depth setting. By sleeping, the drive will save
energy and mechanical wear. A setting of zero in P1-04 will disable the sleep function (default setting).
4.5 iQpump Presets and Functions
YASKAWA TOEP YAIP1W 01B YASKAWA AC Drive - iQpump1000 Quick Start Guide 171
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Start-Up Programming & Operation