User Manual of A90 Series Inverter
207
PID sleep control
options
0: Invalid
1: sleep at zero speed
2: sleep at lower frequency
limit
3: sleep with tube sealed
0.00-100.00 (100.00
corresponds to the PID setting
feedback range)
0.00-100.00 (100.00
corresponds to the PID setting
feedback range)
When the output value and feedback value tend to be stable or the controlled quantity
is within the allowable range on some occasions or at a certain moment, and the output is
not allowed, the sleep status can be applied for a short time. If the controlled quantity is
beyond the control range, the inverter will be awakened and generate the output. These
steps will be repeated to make the controlled quantity within the allowable range and also
save the energy. The detailed function description is shown in Table 7-15.
Table 7-15 Description of Sleep/Wake-up Function
Positive
action
(e.g.
constant
pressure
control)
Judgment of the sleep conditions: If the |Feedback| is greater than
the sleep action point (F09.28) (necessary condition: the feedback
pressure must be greater than or equal to the set pressure during
restart after the stop or sleep), or the output frequency of the
inverter reaches the lower limit, causing the failure to continue to
decelerate (due to the lower frequency limit or lower output limit of
the inverter), and these conditions have been met and maintained to
the sleep delay time (F09.29), the sleep status will be enabled.
★: The PID continues the output during the delay period. The
output depends on the function code after the delay period.
Judgment of the wake-up conditions: If the |Feedback| is less than
or equal to the value of the wake-up action point (F09.30), and this