I have a Hitachi Seiki 20j cnc lathe with a Mayfran conveyor but the conveyor is not responding. The "ON" light on the conveyer is not lite and the green conveyer light on the CNC is not lit as well. The conveyor is connected to the CNC by 2 wires, one supplies power to the conveyer and the other the controls. I'm getting power to the conveyer and can move it in both the forward and reverse direction by pressing the reset buttons on the relays inside the conveyors control cabinet. My manuals say that the M75 command turns the conveyer on and the M76 turns it off. I programed an M75 command at the beginning of a program with no results. The CNC came to a stop when it reached the M75 command. I tried entering a M75 command using MDI but nothing happened. It thought I might have a bad connection between the CNC and the conveyer or a loose wire. I reconnected the CNC and the conveyor several times and traced all the wires back to there connections but all was solid. I wonder now if there is not some combination of buttons I can press on the CNC that might turn on the Green light? I've run out of options, can anyone help?