YASKAWA iQpump1000 - Page 205

• The drive will attempt to maintain the pressure setpoint before immediately going to sleep based on PI Aux Feedback when
Q6-03 setpoint > Q6-24 maximum level.
The drive goes to sleep when the Feedback Level rises above the Q6-24 maximum level for longer than the Q6-05 sleep
delay time. Normal operation resumes when the PI Aux Feedback falls below the Q6-06 level for longer than the Q6-07
time.
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Inverse-Acting PI Aux Level Control (Q6-23 = 1)
The drive will respond in one of two ways to a change in the PI Aux Feedback when Q6-23 is set to 1:
• The drive will attempt to regulate to the Q6-03 level when Q6-03 setpoint > Q6-24 maximum level.
The drive slows down as the feedback level approaches the Q6-03 setting and pressure and flow decrease. The drive then
regulates output speed to maintain the PI Aux Level. Adjust the drive regulating level responsiveness using parameters
Q6-16 and Q6-17.
The drive will go to sleep if level falls below the Q6-24 maximum value for longer than the Q6-05 sleep delay time. Normal
operation resumes when he feedback level rises above the Q6-06 wake-up level for longer than the Q6-07 wake-up time.
Note: Be sure to set Q6-08, PI Aux Control Minimum Speed, to a value high enough to ensure flow.
• The drive will attempt to maintain the pressure setpoint before immediately going to sleep based on PI Aux Feedback when
Q6-03 setpoint < Q6-24 maximum level.
The drive goes to sleep when the Feedback Level falls below the Q6-24 maximum level for longer than the Q6-05 sleep
delay time. Normal operation resumes when the PI Aux Feedback rises above the Q6-06 level for longer than the Q6-07
time.
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Sleep & Wake-Up Methods
The drive goes to sleep in one of three separate methods:
• The drive goes to sleep without performing a sleep boost when the PI Aux Feedback falls below the Minimum Level (Q6-04)
for longer than the PI Auxiliary Control Sleep Delay Time (Q6-05),
The drive wakes up when the PI Aux Feedback level rises above the Setpoint (Q6-03) for longer than the time set in Q6-07
and the standard (pressure) sleep function set in P1-04 and P1-05 calls for a wake-up.
• The drive goes to sleep without performing a sleep boost when the PI Aux feedback rises above the Maximum Level (Q6-24)
for longer than the PI Auxiliary Control Sleep Delay Time (Q6-05).
The drive wakes up when the PI Aux Feedback level falls below the Setpoint (Q6-03) for longer than the time set in Q6-07
and the standard (pressure) sleep function set in P1-04 and P1-05 calls for a wake-up.
• The drive will also go to sleep based upon the standard sleep settings set in parameters P2-01 to P2-04 and perform a sleep
boost.
When Q6-23 is set to 1 (Inverse-acting), the drive wakes up when the PI Aux Feedback rises above the Setpoint (Q6-03)
for longer than the Q6-07 time AND the standard sleep function set in P1-04 and P1-05 calls for a wake-up.
When Q6-23 is set to 0 (Direct-acting), the drive wakes up when the PI Aux Feedback falls below the Setpoint (Q6-03) for
longer than the Q6-07 time AND the standard sleep function set in P1-04 and P1-05 calls for a wake-up.
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PI Aux Low Level Detection
Set Q6-01 to 1 and Q6-09 > 0 to enable PI Aux Low Level Detection.
Low Level Behavior – No Display:
The Low PI Aux Level digital output (H2-0o = 9E) closes when Q6-11 = 0 (No Display) and the PI Aux Feedback falls below
the level set in Q6-09. The digital output opens when the feedback rises above the level set in Q6-09.
Low Level Behavior – Alarm Only:
The “LOAUX – Low PI Aux Lvl” alarm displays and the digital output closes when Q6-11 = 1 (Alarm Only) and the PI Aux
Feedback falls below the level set in Q6-09. The alarm clears and the digital output opens when the feedback rises above the
level set in Q6-09.
Low Level Behavior – Fault:
The digital output closes and the alarm displays when Q6-11 = 2 or 3 (Fault), the output frequency > 0, and the PI Aux Feedback
falls below the level set in Q6-09. The drive faults out with a “LOAUX – Low PI Aux Lvl” fault if the feedback remains below
the Q6-09 level for the time set in Q6-10.
4.6 iQpump Presets and Functions
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
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Start-Up Programming & Operation