On any kind of pendant that has an ESTOP the button must physically interrupt the circuit. So if you are using USB, for example the cable needs to have two extra conductors for the NC ESTOP circuit.
Doesn't matter if the Pendant is a full featured CNC controller or just a simple unit with an MPG and a few buttons. John > -----Original Message----- > From: N [mailto:nicklas.karlsso...@gmail.com] > Sent: June-05-20 12:30 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] How to get data to HAL from USB, serial or socket? > Emergency stop > > > ... > > I think e-stop is a desired feature but it will never be as reliable as one > > that is wired to the machine that does not depend on computer software. > > Agree. Something simple to check, have seen there are safety classed relays > but are not sure about the standards. > > Safety Integrity Lev SIL and functional safety come to my mind. It is simple > to implement an emergency stop in software and/or > hardware but bugs happens and is rather likely to have severe consequences as > it quite often is a reason to push emergency > button. There are safety standards that must be fulfilled. > > > Nicklas Karlsson > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
