YASKAWA CIMR-ZU A Series Programming Manual page 45

The Snooze Function differs from the Sleep Function in that the feedback must drop below the level set to b5-24, PI Snooze
Deactivation Level, before normal drive output will begin again. Immediately prior to Snooze Function activation, the PI
Setpoint can be temporarily increased to create an overshoot of the intended PI Setpoint. The temporary boost is determined
by parameter b5-25, PI Boost Setting Level.
After reaching the temporary boost level (or exceeding the time set to b5-26, PI Maximum Boost Time), the drive output shuts
off (snoozes) and the intended PI Setpoint returns. From this point on, the Snooze Function operates normally and the drive
output returns when the feedback level drops below b5-24.
The parameters necessary to control the PI Sleep/Snooze Function are explained below.
b 1 PI Sleep Function Start Le el
Sets the level that triggers PI Sleep/Snooze.
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
b5-15
b 1 PI Sleep Delay ime
Sets the delay time to activate or deactivate the PI Sleep/Snooze function.
No
b5-16
b 17 PI Accel/Decel ime
The PI acceleration/deceleration time is applied on the PI setpoint value.
When the setpoint changes quickly, the normal C1-
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-
No
b5-17
b 18 PI Setpoint Selection
Enables or disables parameter b5-19 for PI setpoint.
No
b5-18
Settin Disabled
Parameter b5-19 is not used as the PI setpoint.
Settin 1 Enabled
Parameter b5-19 is used as PI setpoint.
b 1 PI Setpoint alue
Used as the PI setpoint if parameter b5-18 = 1.
No
b5-19
Unit and resolution for b5-19 are determined by b5-20 and b5-39.
Note:
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.
Name
PI Sleep Function Start Level
Name
PI Sleep Delay Time
acceleration times reduce the responsiveness of the system as they
Name
PI Accel/Decel Time
Parameter Name
PI Setpoint Selection
Name
PI Setpoint Value
1 2 b Application
Settin an e
0.0 to 240.0 Hz
Settin an e
0.0 to 25.5 s
Settin an e
0.0 to 6000.0 s
Settin an e
0, 1
Settin an e
0.00 to 600.00%
De ault
0.0 Hz
De ault
0.0 s
= 34).
De ault
0.0 s
De ault
0
1
De ault
0.00%