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4 servo motor s71212c analog output works well but with MODBUS didn't follow speeds (2)

Created by: EhsanGh at: 9/21/2014 12:19 PM (1 Replies)

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9/21/2014 12:19 PM	Rate (0)
EhsanGh Posts: 11 Rating: (0)	Hi, I wanted to change the speed of 4 servo motors respectively according to counter via MODBUS,after several try,the servo drives didn`t follow the speeds which was sent by PLC at sometimes irregularly .Then I decided to replace transmission method to analog output which works well now and I didn`t realize that what was the real problem of MODBUS.I check time framing and error bit and didn`t see anything. Thanks again for helpful comments.
EhsanGh Posts: 11 Rating: (0)	Last edited by: Min_Moderator at: 9/22/2014 1:27 PM New subject after splitting from /tf/WW/en/Posts/89664#top Last edited by: Min_Moderator at: 9/22/2014 1:26 PM New subject after splitting from [url="/tf/WW/en/Posts/89664#top"]Sample Program: S7-1200 High Speed Counter (HSC)[/url
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9/22/2014 1:30 PM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122)	Closed cause question posted twice. The second thread with the subject4 servo motor s71212c analog output works well but with MODBUS didn't follow speedsis published within the conferenceSIMATIC S7-1200. Best regards Min_Moderator

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