YASKAWA iQpump1000 User Manual page 204

4.6 iQpump Presets and Functions
u
PI Auxiliary Control
PI Auxiliary Control allows the drive to control pressure when the PI Auxiliary Level is adequate. When the PI Auxiliary
Control Level drops to the PI Auxiliary Control Setpoint set in Q6-03, the drive will regulate based on the PI Aux Level and
the pressure will drop.
The drive also goes to sleep, wakes up, and trips an alarm and/or fault based on the PI Auxiliary Control level.
Note: 1. This function is available in drive software versions PRG: 8552 and later.
2. Not available in drive models 4A0930 and 4A1200.
n Enable PI Aux Level Control Features
Set parameter Q6-01 to 1 to enable PI Aux Level Control and PI Aux Low Level Detection.
The drive performs PI Aux Level Control when Q6-20 is set to 1 and the drive is in PID mode (PID enabled via b5-01, not
jogging, and not disabled by other functions).
Sleep via Minimum and Maximum Levels (Q6-04 and Q6-24) apply to both Q6-20 modes.
n Scaling and Resolution
Q6-21 sets the unit and Q6-22 sets the decimal place for the PI Aux Level parameters and monitors.
n Data Entry Modes for Wake-up Level, Low Level, and High Level Detection
Parameter/Condition
Q6-06 Wake-up Level
PI Direct-acting (Q6-23 = 0)
Q6-06 Wake-up Level
PI Inverse-acting (Q6-23 = 1)
Q6-09 Low Feedback Level
Q6-12 High Feedback Level
n Sensing PI Aux Feedback Level
Set a multi-function analog input H3-oo to 27 to act as the PI Auxiliary Feedback Level and set parameter Q6-02 to the full-
scale pressure of the transducer, with units and decimal place set by Q6-21 and Q6-22. This level is displayed on the U1-96
monitor.
Wire break is detected for the PI Aux FB Level analog input when all of the following are true:
• Q6-19 ≠0 to enable PI Aux Feedback Wire-Break Detection.
• Q6-01 = 1 enabling PI Auxiliary Control.
• The multi-function analog input programmed for PI Aux FB Level (H3-oo = 27) is set for 4 to 20 mA operation (H3-
oo = 2)
• The signal on the analog input falls below 3 mA or rises above 21 mA for longer than 1 second.
The drive responds based on the Q6-19 setting:
• Setting 0: Wire-break detection is disabled.
• Setting 1: The "AUXFB – PI Aux Lvl Loss" alarm will display.
• Setting 2: The drive will trigger an "AUXFB – PI Aux Lvl Loss" fault if the drive is in Auto, Hand, or Sleep.
If there is not a Run command present, the drive will display an "AUXFB – PI Aux Lvl Loss" alarm.
n Direct-Acting PI Aux Level Control (Q6-23 = 0)
The drive will respond in one of two ways to a change in the PI Aux Feedback when Q6-23 is set to 0:
• 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 rises above the Q6-24 maximum value for longer than the Q6-05 sleep delay time. Normal
operation resumes when he feedback level falls below 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.
204
Delta Entry Absolute Entry
-0.0 to -999.9 0.0 to 999.9
+0.0 to +999.9 0.0 to 999.9
-0.0 to -999.9 0.0 to 999.9
+0.0 to +999.9 0.0 to 999.9
YASKAWA TOEP YAIP1W 01F YASKAWA AC Drive - iQpump1000 User Manual
Range Display
(Toggles Automatically)
(0.0 to 999.9) <–> "–Sub frm SetPt"
(0.0~999.9) <–> "+Add to SetPt"
(0.0 to 999.9) <–> "–Sub frm SetPt"
(0.0~999.9) <–> "+Add to SetPt"