Yaskawa Z1000 AC Drive HVAC - Manual (Page 158)

The drive goes into Sleep/Snooze mode if the PI output or frequency reference is smaller than b5-15 for longer than the time
set to b5-16. The drive resumes operation when the PI output or frequency reference is above b5-15 for longer than the time
set to b5-16.
No. Name Setting Range Default
b5-15 PI Sleep Function Start Level 0.0 to 240.0 Hz 0.0 Hz
n b5-16: PI Sleep Delay Time
Sets the delay time to activate or deactivate the PI Sleep/Snooze function.
No. Name Setting Range Default
b5-16 PI Sleep Delay Time 0.0 to 25.5 s 0.0 s
n b5-17: PI Accel/Decel Time
The PI acceleration/deceleration time is applied on the PI setpoint value.
When the setpoint changes quickly, the normal C1- acceleration times reduce the responsiveness of the system as they
are applied after the PI output. The PI accel/decel time helps avoid the hunting and overshoot and undershoot that can result
from the reduced responsiveness.
The PI acceleration/deceleration time can be canceled using a digital input programmed for “PI SFS cancel” (H1- = 34).
No. Name Setting Range Default
b5-17 PI Accel/Decel Time 0.0 to 6000.0 s 0.0 s
n b5-18: PI Setpoint Selection
Enables or disables parameter b5-19 for PI setpoint.
No. Parameter Name Setting Range Default
b5-18 PI Setpoint Selection 0, 1 0
Setting 0: Disabled
Parameter b5-19 is not used as the PI setpoint.
Setting 1: Enabled
Parameter b5-19 is used as PI setpoint.
n b5-19: PI Setpoint Value
Used as the PI setpoint if parameter b5-18 = 1.
No. Name Setting Range Default
b5-19 PI Setpoint Value 0.00 to 600.00% 0.00%
Note: Unit and resolution for b5-19 is determined by b5-20, b5-39, and b5-46.
Parameter b5-19 is internally limited to b5-38. Changing b5-20, b5-38 and b5-39 will not automatically update the value of
b5-19.
n b5-20: PI Setpoint Scaling
Determines the units for the PI Setpoint Value (b5-19) and monitors U5-01 and U5-04.
No. Parameter Name Setting Range Default
b5-20 PI Setpoint Scaling 0 to 3 1
Setting 0: Hz
The setpoint and PI monitors are displayed in Hz with a resolution of 0.01 Hz.
Setting 1: %
The setpoint and PI monitors are displayed as a percentage with a resolution of 0.01%.
4.13 Advanced Drive Setup Adjustments
158 YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual