Yaskawa AC Drive Z1000 - Manual (Page 164)

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-oo 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-oo = 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.
The following conditions apply to drives with software PRG: 1014 and later. 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%.
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
4.13 Advanced Drive Setup Adjustments
164 YASKAWA ELECTRIC TOEP C710616 45E YASKAWA AC Drive – Z1000 User Manual