149
[1.7 APPLICATION FUNCT.]
(FUn-)
Sleep/Wake-up
This function supplements the PID regulator, in order to avoid prolonged operation at excessively low speeds when neither useful nor
desirable.
• It stops the motor after a period of operation at reduced speed. This time and speed can be adjusted.
• It restarts the motor if the PID error or feedback exceeds an adjustable threshold.
Sleep:
Following operation at a speed less than
[Low speed]
(LSP)
+
[Sleep Offset Thres.]
(SLE)
for
a period of time greater than or equal to
[Low speed
time out]
(tLS)
, the motor is stopped on a ramp.
Wake-up:
If the PID error exceeds
[PID wake up thresh.]
(rSL)
(see the example opposite) or if the PID feedback
exceeds
[PID Wakeup Thres.]
(UPP)
, the PID
regulator is reactivated.
tLS
0
0
LSP
LSP + SLE
rSL
Frequency
PID error
Sleep
Wake-up
Time
Time
Содержание ER40-G
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