Gofast1 (Customer) asked a question.

January 12, 2023 at 4:42 PM
New to the P2K line and AMC's, question is does the module/PLC retain the home position registered after power down or will the machine have to be rehomed after every power cycle

Running an SEW helical gear motor with built in HTL incremental encoder driven by an i550 lenze cabinet drive. Machine will be powered down nightly. Also need to know if counter values are retained after power cycle on the P2k's. I know counter values are retained with AB but like I said new to the productivity series due to lack of AB components. I'm pretty impressed with the software so far and it's ease of use. Techinical information could be more detailed though IMO.

 

P2-550 cpu and PS-AMC1 motion module used in the system

 

Thanks,

Chris

  • 2 answers
  • 309 views

  • PouchesInc (Customer)

    I believe if you set the retentive flag in the tag database for your counter it will retain its value on power off (as long as you have a battery in PLC).

     

     

    When you power up, the axis will say it is at 0 position. You can use the set position instruction after the program goes into run mode and set your current position to a saved value you marked as retentive.

     

    In the hardware setup you also have a "Use input reset position" under the IO area, and you can set this as a tag instead of a hard-coded value. Then when that input goes active it sets the axis current position to whatever is stored in that tag value. You can use this as a way of setting position on power up as well, by storing the previous position to that tag and then on power up and first scan pulse an output from a standard card that loops around to that AMC position reset input point.

    If you get a larger AMC unit with more channels or an HSO module you can use the same output from the regular card and send it to multiple of the axis position inputs and trigger them all to "reset"/reload their position at once

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  • PouchesInc (Customer)

    I believe if you set the retentive flag in the tag database for your counter it will retain its value on power off (as long as you have a battery in PLC).

     

     

    When you power up, the axis will say it is at 0 position. You can use the set position instruction after the program goes into run mode and set your current position to a saved value you marked as retentive.

     

    In the hardware setup you also have a "Use input reset position" under the IO area, and you can set this as a tag instead of a hard-coded value. Then when that input goes active it sets the axis current position to whatever is stored in that tag value. You can use this as a way of setting position on power up as well, by storing the previous position to that tag and then on power up and first scan pulse an output from a standard card that loops around to that AMC position reset input point.

    If you get a larger AMC unit with more channels or an HSO module you can use the same output from the regular card and send it to multiple of the axis position inputs and trigger them all to "reset"/reload their position at once

    Expand Post
    Selected as Best

  • Gofast1 (Customer)

    Thank you for the feedback, much appreciated.

 

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