YASKAWA iQpump1000 User Manual page 239

Setting 0: Disabled
Setting 1: Enabled
n P4-12: Thrust Bearing Frequency
Sets the frequency used by the drive when determining which acceleration and deceleration time to use. The Thrust Bearing
function is used for applications using submersible motors. The function provides an alternate acceleration time (P4-11) and
deceleration time (P4-13) for protecting the pump bearings.
At start, the drive will use the P4-11 acceleration time until the P4-12 frequency is reached, at which time it will use the active
C1-oo acceleration and deceleration times. At stop, if the output frequency is above the P4-12 setting, the active C1-oo
deceleration time will be used until the P4-12 setting is reached at which time it will use the P4-13 time setting for the rest of
deceleration.
If P4-12 is set greater than P1-06 (minimum Pump Speed), P4-12 will become the frequency lower limit. The drive PID control
must be disabled (b5-01 = 0) for this function to work.
No.
P4-12
Run
command
Output
frequency
"Thruse Active"
Message &
Digital Output
(H2-0☐ = A9)
n P4-17: Utility Start Delay
Sets the delay time after power up until the drive will recognize a Run command present within one second of power up or
when the Run command is jumpered on the terminal strip.
This is useful in preventing a peak power surge when multiple drives power up and begin accelerating simultaneously. This
function works when the drives all have different P4-17 settings to spread out the power draw during acceleration.
If the Run command is removed and re-applied during the P4-17 time, the drive will cancel the utility start delay and
immediately begin running.
The Utility Start Delay is applied when the drive is auto-restarting after an Undervoltage (Uv) or an Overvoltage (ov) condition.
No.
P4-17
n P4-40: Pressure Reached Detection Selection
Sets the drive state that must be met when triggering the Pressure Detection digital output.
No.
P4-40
Setting 0: Always
Triggers the digital output regardless of drive status (even when the drive is stopped or sleeping).
Setting 1: Drive Running
Triggers the digital output if the drive is producing output voltage (not baseblocked) to the motor. The digital output will not
engage when the drive is sleeping.
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
4.7 Basic iQpump Setup and Application Preset Parameters
Parameter Name
Thrust Bearing Frequency
Thrust Bearing
Ramp to Stop (b1-03 = 0)
C1-01
(or selected)
P4-11
Accel Rate
Figure 4.52 Thrust Bearing
Parameter Name
Utility Start Delay
Parameter Name
Pressure Reached Detection Selection
Setting Range
0.0 to E1-04
P4-12 Thrust Frequency
C1-02
(or selected)
P4-13
Decel Rate
Setting Range
0.0 to 1000.0 min
Setting Range
0 to 2
Default
30.0 Hz
Default
0.2 min
4
Default
0
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