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Fanuc OM M74 port troubles

Dukerc51

Aluminum
Joined
Jun 24, 2011
Location
Maine
I have a YCM mill that lost parameters. I've typed them in but trying to back up my progress. The M5 port seems to always be outputting. I've configured the machine to use the M74 port but it won't send. It's trying to. The machine will receive programs and I am using a known good cable on a similar machine. I had to enable parameter 914 bit 5 to get the machine to at least read programs. Will the M74 port act like the other and send receive programs?
 








 
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