2013/5/20 Kip Shaffer <[email protected]<https://mail.google.com/mail/u/0/?view=cm&fs=1&tf=1&[email protected]> >
> Just wanted to share a little success story with you all. > > This week I added three physical buttons to my mill. They are large, > industrial buttons from Allen Bradley that should last forever. They are: > > E-Stop - Red, latching, easy to hit > Pause - Amber, momentary, easy to hit > Run/Resume - Green, momentary, recessed > > The first two are trivial. They interface directly to the appropriate > halui pins. > > Here's the problem. "Run" and "Resume" are two distinct operations. HAL > must decide which signal to generate based on the current state of the > system. In addition, halui must be in 'auto' mode in order to run the > program. It must be requested if it is not already selected. Furthermore, > timing can be a bit tricky. Continuing to assert halui.mode.auto, > halui.program.resume, or maybe even halui.program.run can result in screwey > behavior. An ideal solution is to assert these signals only until they take > effect. > > My solution (attached) was to: > - Select the appropriate action using 'and' components > - Use flipflop components to stop asserting the signal as soon as they take > effect > - Use the edge component to lock in the decision to ensure one 'run' or > 'resume' command from a single button-press event. > > I posted this on the wiki here: > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?One_Button_Run/Resume > > Thanks for the solution! Might come handy for me soon. Andrew ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
