YASKAWA E7LVD002 Technical Manual page 128

b5-26 PI Maximum Boost Time
Setting Range: 0 to 3600 Seconds
Factory Default: 0 Seconds
Associated with the Snooze Function. In cases where the temporary PI Setpoint (intended PI setpoint + PI Setpoint Boost)
cannot be reached within the PI Maximum Boost Time (b5-26), the Setpoint Boost is interrupted and the Drive output is
turned off.
PI Output
PI Output
PI Setpoint
PI Setpoint
PI Feedback
PI Feedback
Snooze
Snooze
Function
Function
b5-27 PI Snooze Feedback Level
Setting Range: 0 to 100%
Factory Default: 60%
This is a second method of initiating the Snooze Function. If the PI feedback level exceeds the PI Snooze Feedback Level
(b5-27), then the Drive output shuts off. Once the PI feedback drops below the PI Snooze Deactivation Level (b5-24) then
normal Drive and PI operation return.
b5-28 PI Feedback Square Root Function Activation
Setting
0 Disabled (factory default)
1 Enabled
If b5-28= "1: Enabled", the square root of the PI feedback is compared to the PI Setpoint in order to determine appropriate
Drive output to properly regulate the system. This is helpful in cases where the measured feedback is pressure but the PI loop
needs to regulate flow.
b5-26
b5-23
OFF
ON
Either PI Feedback
Either PI
reaches the new
Feedback
boosted setpoint value
reaches the new
or the maximum boost
boosted setpoint
time b5-26 is reached.
value or the
maximum boost
time is reached.
Fig 5.19 Snooze Function Operation
Description
Programming 5 - 36
b5-23
OFF
b5-22
t
t
b5-24
t
TIME