Jump to content
OMRON Forums

Turbo PMAC Command buffer overflow


Recommended Posts

Through PLC program, I want to use following construction:


If (I5111 !> 0)

CMD"#1j=* #3j=*"




Above program will issue jog command every 100 milli seconds.


My query is: How fast can I issue jog command like above ensuring that Turbo PMAC command buffer will not overflow ?

Link to comment
Share on other sites

  • Replies 3
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

I am not sure what the application requires but short answer is: As fast as the PLC is executing, and amount of queued commands in the buffer. Every time you change the variable target and J=* is issued the motor will try to go to the new target position.


Ultimately, you would have to do some testing to make sure it is good enough for your application.


Otherwise, I usually recommend doing this in a motion program using for example X(P1000) around an endless while loop, small TA and TS and some Feedrate F. Where P1000 is being updated at a certain frequency. We use this method successfully in Telescopes tracking star trajectories.

Link to comment
Share on other sites

This topic is now closed to further replies.

  • Create New...