196 YASKAWA TM.iQp.07 iQpump Controller Programming Manual
Table 74 Alarms <0034>
◆ P4-06 Thrust Bearing Deceleration Time <0032>
Setting Range: 0.0 ~ 600.0 <0034>
Factory Default: 1.0 s
This deceleration time will be used to bring the drive from Thrust Frequency (P4-05) to a stop when the Thrust Mode is active. Any time
the Run Command is removed while the drive is operating in the Thrust Mode above the Thrust Frequency, this deceleration time will be
used once the frequency reference is at or below the Thrust Frequency.
■ Function Description: <0034>
Thrust Decel Modification. When the drive is stopped and during Thrust Bearing operation, the drive will decelerate to zero speed from
the Thrust Frequency (P4-05) in the amount of time specified by the Thrust Bearing Deceleration Time Parameter (P4-06). Actual
(internal) deceleration time is calculated as follows:
Internal Decel Rate = Thrust Decel Time x (fmax / thrust frequency) = P4-06 x E1-04 / P4-05
The internal decel rate during thrust bearing operation is limited to a maximum of 600 seconds.
Note: In the Auto Mode, the Minimum Pump Frequency (P1-06) will become the Thrust Frequency if smaller than the Thrust
Frequency (P4-05).
In the Hand Mode, the Minimum Pump Frequency (P1-06) will become the Thrust Frequency if smaller than the Thrust
Frequency (P4-05).
◆ P4-07 Feedback Fault Auto Restart Enable <0032>
Setting Range: 0 ~ 7
Factory Default: 0
Setting to enable / disable Auto Restart for the following iQpump transducer / feedback faults:
LL: Low Level Feedback (P1-07)
HL: High Level Feedback (P1-09)
TL: Transducer Loss (b5-12)
Note: Parameter L5-01 needs to be set to “1” and program L5-03 needs to be set to the applicable time.
Alarm Display Description Countermeasures
Freq. Ref <
Pump Min P1-06
The drive’s frequency reference is set less than the Minimum Pump Frequency P1-06.
The frequency reference will be lower-limited to P1-06 during this time.
This will only be active when:
- Drive is NOT in PI mode
- Drive is running
- Minimum Pump Frequency is enabled (P1-06 > 0.00)
Increase the frequency reference to a value
greater than P1-06.
Freq. Ref <
Thrust P4-05
The drive’s frequency reference is set less than the Thrust Bearing Frequency P4-05.
Frequency P1-06. The frequency reference will be lower-limited to P4-05 during this
time.
This will only be active when:
- Drive is NOT in PI mode
- Drive is running
- Thrust Bearing is enabled (P4-05 > 0.00)
Increase the frequency reference to a value
greater than P4-05.
Setting TL HL LL
0: Disable Disable Disable
1: Disable Disable Enable
2: Disable Enable Disable
3: Disable Enable Enable
4: Enable Disable Disable
5: Enable Disable Enable
6: Enable Enable Disable
7: Enable Enable Enable
(522 pages)
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