R300 inch/crawl warning signal

I have a 1997 R300 that randomly sounds the inch/crawl/run warning signal without letting the machine inch/crawl/run the next time the buttons are pushed... without repeating the alarm again each time the inch buttons are pressed, and again instead of letting the machine operate. This also happens while in the plate hanging program as well. Sometimes hitting the 'stop' button and then trying to inch the press will let the operator inch the press normally after a single warning signal, but even that trick seems to be failing as time goes on.

Is this a timer? Relay? Contactor? PCboard that can swapped with another?

THanks for any suggestions