Can an OEM code be created or edited?  If I am understanding correctly, the OEM code 1000 is a start cycle.  Thus an external button could be used via inputs pins/ports to trigger the start cycle provided that system hot-key for that trigger was entered as 1000. Am I correct so far???

If yes, then can an OEM code be created to run a macro via OEM triggers? 

OEMcods are internal functions that where brought out for your use.

OEMTriggers are the path to allow you to use outside inputs (buttons) and map them to internal functions by assigning the trigger to an OEMCODE.

No you cannot create an OEMCODEs they are hardcoded internally.

You can monitor the OEMTrigger input LEDS and create special functions via outside inputs

Hope that helps, Might want to download a read the Customizing Mach2 manual AND the Mach3 Programmers manual.

(;-) TP

Thanks, you answered my question.  If only they had known my plans . . .  life would be perfect.  I have received a few recommendations for external button interface, do you have a best practice for the task?  I need to run a minimum of 4 macros from an external button.