Hitachi SJ Series User Manual page 274

Chapter 12
Boost function prior to sleep
Ａ
• This raises the PID target value before sleep and
increases the feedback amount once. By this, the
sleep status can be maintained for a long period of
time.
• The diagram below is an example when 01 is set to
[AH-85] and 02 to [AH-93].
Feedback value
PID target value + boost amount
[AH-90]
PID target value
Wake start level [AH-84]
Output speed
Sleep start level [AH-86]
Sleep function disable time
A
• Minimum operation time from start to sleep [AH-91]
and minimum retaining time of the sleep status
[AH-92] can be set.
Feedback value
PID target value + boost amount
PID target value
Wake start level [AH-84]
Output frequency
Sleep start level [AH-86]
[AH-90]
Before sleep
Minimum
operation time
[AH-91]
• When [AH-85] is 01, the set value of [AH-90] will be
added to the PID target value for the set time of
[AH-89], if the output frequency stayed below
[AH-86] continuously.
Boost time [AH-89]
Sleep
Operation time
[AH-87]
Without boost
• PID sleep operation can prevent the operation of
switching between the sleep status and operation
status frequently.
Sleep
Operation
time
[AH-87]
12-10-19
Inverter Functions
With boost
Wake operation time
Sleep status
Minimum
retaining time
[AH-92]
[AH-95]