Yaskawa iQpump Micro Manuel d'utilisateur télécharger pdf (Page 105)

4.7 iQpump Presets and Functions

Table 4.8 iQpump Presets and Functions

Feature Name Preset or Function Page

Pump Down Level Control Preset 105

General Purpose Mode Preset 107

Low City or Low Suction Inlet Pressure Function 108

Current Limit Function 109

Speed Follower Deceleration Time Switchover Function 110

Software (MEMOBUS) Multiplexing Setup Function 111

Simple Duplex System Application Function 115

Multiplexing Stop History Function 118

iQpump Presets

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 (E2-04). 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 PID feedback (H3-10 = B).

Start Up Procedure

Set parameter A1-03 to 6009 (Pump Down Level) to pre-set parameter values for this application.

Set the motor-rated current in parameter E2-01. This information can be found on the motor nameplate or specification

sheet.

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.

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.

Set the desired water depth level in parameter Q1-01 (PID 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 PID setpoint.

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.

The default setting does not allow the drive to automatically restart after power loss if the drive was running at the

time of power loss. Set P4-10, AUTO Mode Operator Run Power Down Storage, to 1 to enable this feature.

Press the AUTO key to start the drive with PID control (water depth control). Press the OFF key to stop the drive.

The pump can be run in 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 PID 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

4.7 iQpump Presets and Functions

YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual

105

Start-Up Programming

& Operation

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Yaskawa iQpump Micro Manuel d'utilisateur Page 105

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