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"merge" camming to absolute position move

Created by: SiforumUser at: 7/31/2013 3:00 PM (6 Replies)

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7/31/2013 3:00 PM	Rate (0)
SiforumUser Experienced Member Joined: 1/30/2007 Last visit: 9/8/2025 Posts: 89 Rating: (5)	I have an axis that is camming (extend / retract motion). When the machine has a jam, I need to stop the cam and execute an absolute position move (time based) on this axis. Is there a way to execute a _pos instruction that will cancel the Camming motion and blend into an absolute move to the position specified?

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7/31/2013 3:37 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 1/19/2026 Posts: 6069 Rating: (828)	Hello, it is possible. Information about: 2.24.4 Motion transitions http://support.automation.siemens.com/WW/view/en/61055938 Commands: _pos or _runtimelockedPositionProfile
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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7/31/2013 4:15 PM	Rate (0)
SiforumUser Experienced Member Joined: 1/30/2007 Last visit: 9/8/2025 Posts: 89 Rating: (5)	The part that is confusing is that a _stop will not affect a syncronous operation, but if a _pos is executed with mergeMode set to IMMEDIATELY this will cancel the Camming? Thanks for the information.

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8/1/2013 12:53 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 1/19/2026 Posts: 6069 Rating: (828)	Hello, look at chapter 2.24.6 *5 Only a _stop without abort doesn't stop a gearing/camming command.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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8/1/2013 7:45 PM	Rate (0)
SiforumUser Experienced Member Joined: 1/30/2007 Last visit: 9/8/2025 Posts: 89 Rating: (5)	The help text in Scout has this statement for the _stop command... "The _stop command affects only single-axis motions and cannot be used for synchronous operation motions." What does this mean?

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8/2/2013 3:44 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 1/19/2026 Posts: 6069 Rating: (828)	Hello, "The _stop command affects only single-axis motions and cannot be used for synchronous operation motions." means, that a simple stop command cannot stop a camming. In my last answer, I misunderstood the diagramm in 2.24.6. Simple stop command's are _stop without abort and _stop with abort, too. Emergency stop commands stop camming/gearing. The difference between "simple stop command " and "Emergency stop command" in ST (MCC uses the same chart)is the command: _stop or _stopEmergency
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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8/2/2013 4:09 PM	Rate (0)
SiforumUser Experienced Member Joined: 1/30/2007 Last visit: 9/8/2025 Posts: 89 Rating: (5)	Ok, I have tested that the _pos can stop a cam and merge to an absolute move, and a _stop will not stop a sync operation. Thanks for the information. It's more clear now.

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