YASKAWA FSDrive-MV1000 - Page 123

2.2 b: Application
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide 123
n b5-37: PID Feedback High Detection Time
Sets the time that the PID feedback must exceed the value set to b5-36 before feedback loss is detected.
n
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 when the PID output or frequency reference rise above
the PID Sleep operation level for the specified time. An example of PID Sleep operation appears in the figure below.
Figure 2.18
Figure 2.18 PID Sleep Operation
Notes on using the PID Sleep function
• The PID Sleep function is active even when PID control is disabled.
• The PID Sleep function stops the motor according to the stopping method in b1-03.
The parameters necessary that control the PID Sleep function are explained below.
n
b5-15: PID Sleep Function Start Level
Sets the level that triggers 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
to b5-16. The drive resumes operation when the PID output or frequency reference is above b5-15 for longer than the
time set to b5-16.
n
b5-16: PID Sleep Delay Time
Sets the delay time to activate or deactivate the PID Sleep function.
n
b5-17: PID Accel/Decel Time
The PID acceleration/deceleration time is applied on the PID setpoint value.
When the setpoint changes quickly, the normal C1- acceleration times reduce the responsiveness of the system as
they are applied after the PID output. The PID accel/decel time helps avoid the hunting, overshoot and undershoot that
can result from the reduced responsiveness.
The PID acceleration/deceleration time can be canceled using a contact input programmed for “PID SFS cancel”
(H1- = 34).
No. Name Setting Range Default
b5-37 PID Feedback High Detection Time 0.0 to 25.5 s 1.0 s
No.
<1> Refer to Control Mode Dependent Parameter Default Values on page 84 for details on default settings.
Name Setting Range Default
b5-15 PID Sleep Function Start Level 0.0 to 120.0 Hz Determined by A1-02 <1>
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 0.0 to 6000.0 s 0.0 s
PID Output
PID Sleep Function
Start Level ( b5-15)
PID Sleep Delay Time
PID 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
common_TMonly
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