4-186
08 – 56
Detection Level of Fire Mode AI2 Signal
Range
【0~100】%
08 - 57
Delay Time of Fire Mode AI2 Signal Loss
Range
【0.0~10.0】Sec
08 - 58
Selection of Fire Mode AI2 Signal Loss
Range
【0】：Keep Running
【1】：Fire Mode Speed(08-52)
【2】：Max. Output Frequency of Motor 1 (01-02)
When 08-51=2 (AI2), inverter will trigger AI2 feedback loss detection function automatically.
Selection of Fire Mode AI2 Signal Loss (08-58):
When 08-58=0, output frequency will be fixed on current frequency.
When 08-58=1, output frequency will be based on the setting value of parameter 08-52.
When 08-58=2, output frequency will be based on the setting value of parameter 01-02.
If AI2 signal is less than the setting value of 08-56 in 360ms, and the time longer than setting value of
08-57, the frequency reference will be considered to loss.
Analog signal will compare with the previous value at 360ms, if inverter ensure the frequency reference
already loss, frequency reference will base on the value of 08-58.
Following is the description of the Frequency Loss Function:
When the inverter is in operation and the selected analog command source AI2 disappears, the command
will operate according to the setting ratio of 08-58.
The following figure is the operating diagram of analog frequency instruction AI2 when the frequency
Instruction is lost.
t
By 08-58
Setting
360ms
Frequency
Command
AI2 Loss Detection
t
08-56
08-57
By AI2
Setting
Fig 4.3.76 AI2 frequency reference loss
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