4-183
10-40
Selection of PID Sleep Compensation Frequency
Range
【
0
】
: Disabled
【
1
】
: Enabled
The PID Sleep function is used to stop the inverter when the PID output falls below the PID sleep frequency
level (10-17) for the time specified in the PID sleep delay time parameter (10-18).
The inverter wakes up from a sleep condition when the PID output (Reference frequency) rises above the PID
wake-up frequency level (10-19) for the time specified in the PID wake-up delay time (10-20).
Set parameter 10-17 to a value greater than 0 to enable the PID sleep function.
Refer to figure 4.3.83 (a), (b) and (c) for PID sleep/wakeup operation:
PID
Target
Value
Feedback
Value
+
-
PID=OFF
PID=ON
f
Soft Start
Output
Frequency
( Fout )
PID
Sleep/Wakeup
function
(Frequency)
Frequency Reference
10-29= 0
10-29=1 or 2
t
PID
Sleep
Compensation/
wakeup function
10-40= 0
10-40= 1
Figure 4.3.83 (a) PID control block diagram
Output
Frequency
Frequency Reference
t
Wakeup Delay Time
(10-20)
Sleep Delay Time
(10-18)
Fmin
(01-08)
Sleep
Frequency
(10-17)
Wakeup
Frequency
(10-19)
Output
Frequency
Figure 4.3.83 (b) Timing diagram PID sleep / wakeup
Output
Frequency
Frequency Reference
t
Wakeup Delay Time
(10-20)
Sleep Delay Time
(10-18)
Fmin
(01-08)
Sleep
Frequency
(10-17)
Wakeup
Frequency
(10-19)
Output
Frequency
Figure 4.3.83 (c) Timing diagram of PID sleep compensation/ wakeup
