4-225
Output Frequency (Fout)
Frequency Reference
(Fref)
t
wake up delay time
(10-20)
sleep delay time
(10-18)
Fmin
(01-08)
Sleep
Frequency
(10-17)
Wake- up
Frequency
(10-19)
Output
Frequency
Figure 4.4.83: (b) Timing diagram PID sleep / wakeup
Output Frequency (Fout)
Frequency Reference
(Fref)
t
wake up delay time
(10-20)
sleep delay time
(10-18)
Fmin
(01-08)
Sleep
Frequency
(10-17)
Wake- up
Frequency
(10-19)
Output
Frequency
Figure 4.4.83: (c) Timing diagram of PID sleep compensation frequency/ wakeup
Notes:
10-40=0, refer to Figure 4.4.83 (b)
The PID sleep timer is enabled when the output frequency (Fout) falls below the PID sleep frequency (10-17).
When the sleep timer reaches the set PID sleep delay time (10-18) the inverter will decelerate to a stop and enter
the sleep mode.
10-40=1, refer to Figure 4.4.83 (c)
When output frequency (Fout) is lower than PID sleep frequency set by 10-17, Timer of PID sleep mode will run
and the output frequency changes with the reference frequency (Fref) until it reaches the minimum output
frequency (Fmin) set by 01-08. When the PID sleep delay time (10-18) is completed, the motor will run gradually
to the PID sleep frequency set by 10-17.
Note:
It should be used in the situation of being required the constant frequency.
While sleep mode is active and the motor has stopped, the internal PID control is still in operating. When the
reference frequency increases and exceeds the wakeup frequency parameter 10-19 for the time specified in the
wakeup delay time parameter 10-20, the inverter will restart and the output frequency will ramp up to the
reference frequency.
