I’m currently working on a wire processing machine. Basically an unwind, coating, heating and rewind running relatively slow (25 Feet/min). My question is during the threading process the operator would like the ability to start and stop the machine at various locations. NFPA 79-9.2.5.2.4 states that if multiple starts are present then all start control devices shall be actuated concurrently, so multiple start buttons will not work. My question is if we introduce a THREAD MODE that limits line speed to the machine and is selected and enabled at the main operator station can I then have several locations that have a THREAD SPEED button that is only active in this mode. Of course there would be a STOP and E-STOP at the same location. We have looked at JOG push and hold buttons but some of the products take two hands to wrestle, and allowing a second operator to control the JOG or start and stop seems more of a safety issue then multiple start buttons.