Thanks guys. Think I will have to add another relay into my circuit. So 24v will come into cp1 out of cp2 to a relay coil - contact controlling the run signal. The second cable out of cp2 will go to b relay coil - contacts controlling the mains power live and neutral to vfd on/off as part of the the e-stop system. Will this work? Will try and get a sketch uploaded tomorrow to clarify.