Edvin Posted June 22, 2016 Report Share Posted June 22, 2016 Dear all, have someone any application or some sample about driver control by analog output with time rump up & time rump down system. Link to comment Share on other sites More sharing options...
Kikis Posted June 30, 2016 Report Share Posted June 30, 2016 Hello Edvin, I asked the same question a few years ago in the forum and got great feedback, so have a look on the following topic: http://forum.unitronics.com/topic/1584-analog-out-with-up-down-ramp/?hl=ramp My application was to drive a pressure proportional valve for hydraulic control system via analog output. For your application, I think that all VFD's have this feature as standard, did you check that your VFD is not capable of doing this automatically? For example on Lenze drives, which is the VFD brand i use in my projects, you can set the total acc/dec time from the local keypad of the drive. So i'm just sending the analog voltage command from the PLC and the drive automatically performs the ramping of frequency. Link to comment Share on other sites More sharing options...
Edvin Posted July 3, 2016 Author Report Share Posted July 3, 2016 Thank you very much.. Link to comment Share on other sites More sharing options...
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