YASKAWA T1000V - Page 128

5.2 b: Application
128 YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
■ PID Sleep
The PID Sleep function stops the drive when the PID output or the frequency reference falls below the PID Sleep
operation level for a certain time. The drive will resume operating once the PID output or frequency reference rises above
the PID Sleep operation level for the specified time. The operation is explained in the figure below.
Figure 5. 20
Figure 5.20 PID Sleep Operation
Notes on using the PID Sleep function:
• The PID Sleep function is always active, even if PID control is disabled.
• The method the Sleep function uses to stop the motor is defined by parameter b1-03.
• The parameters necessary to set up the PID Sleep function are explained below.
■
b5-15: PID Sleep Function Start Level
Sets the level used for PID Sleep.
The drive goes into Sleep mode if the PID output or frequency reference is smaller than b5-15 for longer than the time set
in b5-16. It resumes the operation when the PID output or frequency reference is above b5-15 for longer than the time set
in b5-16.
■
b5-16: PID Sleep Delay Time
Sets the delay time to activate or deactivate the PID Sleep function.
■
b5-17: PID Accel/Decel Time
The PID acceleration/deceleration time is applied on the PID setpoint value.
As the normal acceleration times C1- are applied after the PID output, they reduce the responsiveness of the system
and can cause hunting or over- and undershooting when the setpoint changes quickly. Using the PID acceleration/
deceleration time instead helps to avoid such problems.
The PID acceleration/deceleration time can be canceled using a digital input programmed for “PID SFS cancel” (H1-
 = 34).
■
b5-18: PID Setpoint Selection
Enables or disables parameter b5-19 for PID setpoint.
No. Name Setting Range Default
b5-15 PID Sleep Function Start Level 0.0 to 400.0 Hz 0.0 Hz
No. Name Setting Range Default
b5-16 PID Sleep Delay Time 0.0 to 25.5 s 0.0 s
No. Name Setting Range Default
b5-17 PID Accel/Decel Time 0 to 255 s 0 s
No. Parameter Name Setting Range Default
b5-18 PID Setpoint Selection 0 or 1 0
PID Output
PID Sleep Level ( b5-15)
Sleep Delay Time
Sleep Delay Time
Run command enabled
Continues to output “During Run”
Internal Run
command
External Run
command
During Run
Stop
b5-16 b5-16
Run