VB5N series inverter
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For example: Fig 4-39:
Fig.4-39 zero-frequency backlash
Start process:
After start command is sent, the motor will start and accelerate to the preset frequency in the Acc time when the setting
frequency reaches or exceeds Fb.
Stop process:
The inverter will not stop immediately if the setting frequency is lower than Fb, only when the setting frequency reaches
Fa, the inverter will stop output.
Fa points to zero-frequency wakeup threshold (P7.18), Fb-Fa points to zero-frequency wakeup backlash (P7.19).
This function can realize domant function and save the energy, besides, the inverter will not frequent start at threshold fre-
quency by defining the backlash width.
4-2-9. Simple PLC operation parameters (Group P8)
Simple PLC function is a multi-speed generator, inverter can auto-change frequency and direction according to the running
time to satisfy the technical requirements. See Fig4-40.
Fb: Pa+ zero-frequency backlash
Fa: zero-frequency run threshold
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