Yaskawa iQpump Controller Programming Manual - Manual (Page 170)

170 YASKAWA TM.iQp.07 iQpump Controller Programming Manual
• P2-01 = 1: Display based on “Hz” <0034>
• P2-01 = 2: Display based on “Hz” <0034>
• P2-01 = 3: Display based on “rpm” <0034>
• P2-01 = 4: Display based on “Hz” <0034>
The Alternative Sleep Activation Level (P2-20) works in conjunction with the Start Level (P1-04) and the Sleep Level Type (P2-01).
It is recommended that P2-20 be programmed 1 or 2 Hz above the P1-06 value. The sleep level using P2-20 enables the sleep mode;
however, the drive still enters sleep based on P2-20. With the normal default sleep level programmed in
P2-02, the sleep cycle will not activate until the output frequency is above P2-02.
◆ P2-21 Sleep Boost Level
<0034>
Setting Range: 0.0 ~ 6000.0
Factory Default: 0.0
Refer to parameter P2-21 in Appendix A for description details.
◆ P2-22 Sleep Boost Maximum Time
<0034>
Setting Range: 1.0 ~ 160.0 s
Factory Default: 5.0 s
Refer to parameter P2-22 in Appendix A for description details.
◆ P2-23 Anti-No Flow Bandwidth
<0034>
Setting Range: 0.00 ~ 2.00%
Factory Default: 0.40%
The iQpump P2-23 parameter is to provide a simple and reliable method of detecting and reacting to the “No-Flow” condition. When the
drive detects that the pump is no longer contributing to the overall pressure in the system due to a “No-Flow” condition, an increased rate
of deceleration will occur. The normal sleep function will then take over. This function will only operate when the Sleep Level Type is
frequency or speed (P2-01 = 3).
Figure 1.123
Figure 127. Anti-No-Flow
PI
Feedback
Output
Frequency
Anti No Flow
P2-24
ANF Det Time
PI
Setpoint
P2-03
Sleep Tm.
Output Frequency if Anti-No-Flow
disabled.
Drive
(re)Start
Start of No-Flow
Condition
P2-02
Sleep Level
Min Speed or
Thrust Speed
are