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Need help reducing Acceleration on older VFD

mmurray70

Stainless
Joined
Jan 11, 2003
Hi Guys,

I have an older Mitsubishi FR-SB that doesnt have a normal acceleration adjustment in seconds like most drives do. Specifications say Accel-Decel method is "slip-limitation". So not sure if i can adjust it at all.

There are several adjustments on the "speed loop". Im wondering if any of these could be reduced slightly to provide a more gradual start and stop, and drop current peaks a little. Any suggestions?

I attached a pic of details on adjustments. And heres a link to the FR-SB manual: FR-SB Maintenance Manual.PDF - Google Drive
 

Attachments

  • fr-sb adjustment.jpg
    fr-sb adjustment.jpg
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See page 24, decelerating time too short.

SAF Ω

Thank you so much! I didnt see that in the manual at all. I turned VR708 "clockwisely" as the manual says and now its working great! Accelerating very nice and smooth and only about half the current during start and stop as it was before. Just what i wanted. Thanks again! :)
 








 
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