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Drives starts to Rotate in Reverse When reach Maximum RPM

1/8/2014 5:13 PM	Rate (0)
Arunram V Experienced Member Joined: 1/23/2012 Last visit: 11/6/2025 Posts: 33 Rating: (0)	Dear All, I my project i use Sinamics G120C drive . My application is to start and stop through Digital Commands & Speed Setpoint through Profibus Communication I Use P0922 - 999 When i start Motor starts to run . if i give 20 hz it runs @ 600RPM 40 hz it runs @ 1200RPM 99.9 hz it runs @2997 When i give 100hz it goes to -3000RPM(Negative Value) i dont understand whats the Problem . i check P1080 -0 & P1082 -3200 Pls give me Some solution ... thanks In advvance Regards, Arunram Vasudevan

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1/8/2014 10:44 PM	Rate (0)
zako_ Posts: 895 Rating: (67)	... what value has p2000? which HEX value do you send at high speed? - maybe p2000 = 1500rpm und you send for 3000 rpm 7FFF and then 8000 HEX?
zako_ Posts: 895 Rating: (67)
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1/9/2014 6:23 AM	Rate (0)
Arunram V Experienced Member Joined: 1/23/2012 Last visit: 11/6/2025 Posts: 33 Rating: (0)	Dearzako_, Thank you very much . The value in P2000 is 1500 The value i send for the 3000 RPM is 32768 (8000) that's the problem . Now it ok . If possible pls tell me the how we can disable the Negative value or disable the reverse direction in the Inverter . For my application the motor should not run in the reverse . Regards, Arunram Vasudevan

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1/10/2014 10:28 PM	Rate (0)
zako_ Posts: 895 Rating: (67)	,,, you can set p2000 = 3000 rpm, so the drive will run 3000rpm with 4000HEX. note: you can send +/- 199,99...% from the PLC - not more! 7FFF (hex)= +199,99..% 8000 (hex) = - 199,99.% FFFF (hex) = -0,0..1%
zako_ Posts: 895 Rating: (67)
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1/13/2014 9:13 AM	Rate (0)
Arunram V Experienced Member Joined: 1/23/2012 Last visit: 11/6/2025 Posts: 33 Rating: (0)	Dear Zako , thank you very much for the inforamtion.. :) Reagards, Arunram Vasudevan

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