YASKAWA TM.iQp.07 iQpump Controller Programming Manual 193
Table 72 Parameters
◆ P4-02 Pre-charge Frequency
Setting Range: 0.00 ~ 120.00 <0034>
Factory Default: 0.00 Hz
The iQpump drive can be configured for a pre-charge function. The frequency reference used by the pre-charge function is programmed
in the Pre-charge Frequency (P4-02).
Refer to Pre-charge Level (P4-01) for more details.
The Pre-charge Frequency (P4-02) works in conjunction with the Pre-Change Level (P4-01).
◆ P4-03 Pre-charge Time
Setting Range: 0.0 ~ 3600.0 min
Factory Default: 0.0 min
The iQpump drive can be configured for a pre-charge function. The maximum allowable time for the pre-charge function is programmed
in the Pre-charge Time (P4-03). Setting P4-03 to a value of 0 will disable the pre-charge function.
Refer to Pre-charge Level (P4-01) for more details.
The Pre-charge Time (P4-03) works in conjunction with the Pre-Change Level (P4-01).
◆ P4-04 Thrust Bearing Acceleration Time <0032>
Setting Range: 0.0 ~ 600.0 <0034>
Factory Default: 1.0 s
The iQpump drive can be configured for a thrust bearing function. The acceleration time, when the thrust bearing function is enabled (P4-
05 > 0), is programmed in the Thrust Bearing Acceleration Time (P4-04).
Refer to Thrust Bearing Frequency (P4-05) for more details.
The Thrust Bearing Acceleration Time (P4-04) works in conjunction with the Thrust Bearing Frequency (P4-05).
■ Function Description: <0034>
Thrust Accel Modification. When the drive is started and during Thrust Bearing operation, the drive will accelerate to the Thrust
Frequency (P4-05) in the amount of time specified by the Thrust Bearing Acceleration Time Parameter (P4-04). Actual (internal)
acceleration time is calculated as follows:
Internal Accel Rate = Thrust Accel Time x (fmax / thrust frequency) = P4-04 x E1-04 / P4-05
The internal accel rate during thrust bearing operation is limited to a maximum of 600 seconds.
Parameter
No.
Addr.
Hex
Parameter Name
Digital Operator Display
Description Range Default
Menu
Location
P4-12
115
Pre-charge Frequency 2
Pre-charge Freq2
Frequency reference used when Pre-charge 2 function is active.
A value of 0.00 disables this function.
0.00 ~
120.00 Hz
0.00 Hz Programming
P4-13
116
Pre-charge Time 2
Pre-charge Time2
Time at which the drive will spend at the Pre-charge Frequency 2
(P4-12) speed during pre-charge.
A value of 0.0 disables this function.
0.0 ~
3600.0 min
0.0 min Programming
Denotes that parameter can be changed when the drive is running.
(522 pages)
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