Yaskawa Z1000 AC Drive HVAC - Manual (Page 159)

Setting 2: r/min
The setpoint and PI monitors are displayed in r/min with a resolution of 1 r/min.
Setting 3: User Defined
Parameters b5-38 and b5-39 determine the units and resolution used to display the values the setpoint in b5-19, and PI monitors
U5-01 and U5-04.
n b5-21: PI Sleep Input Source
Selects the Sleep Function characteristic action. When b5-21 is set to 1, the Sleep Function Start Level (b5-15) is compared
to the output of the drive (Speed Command after PI Block). Use this setting for open loop control.
The Sleep Function Start Level (b5-15) can be compared to the drive input or setpoint by setting b5-21 to 0.
When b5-21 is set to 2, a variation of the Sleep Function called “Snooze” is enabled. See parameters b5-22 to b5-27 for details.
No. Parameter Name Setting Range Default
b5-21 PI Sleep Input Source 0 to 2 1
Setting 0: PI Setpoint
Setting 1: SFS Input
Setting 2: Snooze
n b5-22: PI Snooze Level
Sets the PI Snooze function start level as a percentage of maximum frequency.
No. Parameter Name Setting Range Default
b5-22 PI Snooze Level 0 to 100% 0%
n b5-23: PI Snooze Delay Time
Sets the PI Snooze function delay time in seconds.
No. Parameter Name Setting Range Default
b5-23 PI Snooze Delay Time 0 to 2600 s 0 s
n b5-24: PI Snooze Deactivation Level
When the PI feedback drops below this level, normal operation starts again. Sets as a percentage of maximum frequency.
No. Parameter Name Setting Range Default
b5-24 PI Snooze Deactivation Level 0 to 100% 0%
n b5-25: PI Setpoint Boost Setting
Temporary increase of PI setpoint to create an overshoot of the intended PI setpoint.
No. Parameter Name Setting Range Default
b5-25 PI Setpoint Boost Setting 0 to 100% 0%
n b5-26: PI Maximum Boost Time
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.
No. Parameter Name Setting Range Default
b5-26 PI Maximum Boost Time 0 to 2600 s 0 s
n b5-27: PI Snooze Feedback Level
The second method of initiating the Snooze Function. The drive output shuts off when the PI feedback level exceeds the PI
Snooze Feedback Level (b5-27).
4.13 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 159
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Start-Up Programming & Operation