You really should not use a 'make' button' on E-stop or critical switches like limit travels. Since they are seldom used, the chances of a contact problem increase over time.
Use a 'press to break', and so the switch is always under test. If it fails, you are still safe. Sounds like you'll also have less of an interference problem, but that should be corrected. Roland On 20 February 2010 05:39, Flying Electron <[email protected]> wrote: > Hi, > > I was using one of the inputs to read my E-STOP button which shorts to > ground when triggered, but I kept on getting false positives. I looked > at the input pin in halscope and saw a square wave that goes high for > 2ms then low for 2ms and repeats. I removed the E-Stop button and > everything else connected to the IO of the 7i43 so it is just the > parallel port and the usb cable powering the 7i43 connected. Looked in > halscope again, and the square wave is still there with nothing > connected. Checked several other unassigned pins and they also show the > square wave. Anyone have any ideas on what is happening? > > Thanks! > > Lawrence > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
