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G120 CU250s EPOS- System Direction

3/10/2014 4:11 AM	Rate (0)
JWilson Bronze Member Joined: 9/16/2008 Last visit: 1/5/2026 Posts: 60 Rating: (3)	Dear Tech Team I am working on a G120 CU250s and EPOS. I set the system up...tuned speed controller, etc The positioningis working great. My problem lies in reversing the system. For example I want a positive setpoint or a system direction change.(the machine needs to go the other direction for a positive setpoint) When changing P1820 my positioning starts acting erratic. Is this the correct parameter to change ? The drive runs fine in speed control- I have P1300 to closed loop speed 21. I also know that P410 is set correctly Ideas? Thanks

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3/11/2014 9:33 AM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 1/8/2026 Posts: 6065 Rating: (828)	Hello, you can change this by parameter p1821 (=1). Further info see ONLINE- help / list manual.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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3/12/2014 12:25 AM	Rate (0)
JWilson Bronze Member Joined: 9/16/2008 Last visit: 1/5/2026 Posts: 60 Rating: (3)	Thanks But P1821 does not exist in CU250S
	Last edited by: JWilson at: 3/12/2014 12:25 AM
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3/12/2014 12:24 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 1/8/2026 Posts: 6065 Rating: (828)	Hello JWilson, you are right. Sorry, the p1821 is in the SINAMICS S120 drives. I mixed it up. By inverting the direction with p1820, the invertion of the encoder has to be done also. Please find the attachment. I assume that there is the same encoder for actual possition and actual speed. (Encoder1). If two separate encoders are used, in the encoder data for encoder 2 theactual position an speed has to be changed. This (for the encoder)can be done in the configuration only, not dynamicallyduring operation. Attachment D:\temp\encoder1.jpg (392 Downloads)
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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3/17/2014 1:48 PM	Rate (0)
JWilson Bronze Member Joined: 9/16/2008 Last visit: 1/5/2026 Posts: 60 Rating: (3)	Perfect Thanks

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