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Speed controller

5/8/2013 9:07 AM	Rate (0)
OnlyOne Posts: 15 Rating: (0)	Expert, In our product line, has more than 10 6SE70 SIMOVERT Drive,now two of them the speed setpoint and feedback has big variance, can tell me which paremetes adjust make it the variance smaller. Regards Paul
OnlyOne Posts: 15 Rating: (0)
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5/8/2013 3:01 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 9/8/2025 Posts: 6039 Rating: (828)	Hello, in order to check the encoders condition, with a Masterdrives VC, the drive is able to operate in encoderless speed control p100=3. If the variance isn't as wide anymore, it seems that there is an encoder or EMC problemat site.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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5/15/2013 10:39 AM	Rate (0)
OnlyOne Posts: 15 Rating: (0)	TechTeam Thanks, we already changed one new encoder, but variance still there, nearly 0.5 percent variance, more than other drives, But really a good idea for trouble shooting Regards Paul
OnlyOne Posts: 15 Rating: (0)
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5/17/2013 3:08 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 9/8/2025 Posts: 6039 Rating: (828)	Hello Paul, you wrote that the setpoint has a variance also, so please check the setpoint chanel. (Use the function diagrams of the compendium). If possible, change the setpoint source, e.g.if ananalogue input is used, disconnect it and use a commissioning box or simmilar, where a analogue setpoint is generated without any disturbance. Try to set a fixed setpoint and check whether ther variancestill occurs. By the way, if analogue devices are used, check the shieldings and the potential equalisations. Make traces of the setpoint and actual speeds as well of the currents and send it with an actual downloadfileby opening a case tothe customer support. (https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.cssr&siteid=csius&lang=en&aktprim=100&content=support/newSR/index.asp)
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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