Hello, everyone.
I'm trying to figure out how to change the input port from a Mitsubishi Meldas 64. Reading the M60's handbook, I found out there are 2 valid values for the parameter (#9001):

- Set 1 --> to use Channel 1
- Set 2 --> to use Channel 2

Currently, I'm not allowed by the CNC to put "1" as the port number. It shows me "E02 - Data Over" (meaning I'm out of range).
As I read, Channel 1 is used for manteinance functions, so I figured.. If I can change the operation mode to "Manteinance", perhaps I'd be able to change the port and establish the communication with a PC.

What is specifically the function of "the maintenance function data input/output #(99)" ?
Attachment 196096

It isn't explained in the manuals. What values do I have to set there?
I'd appreciate any feedback.
Regards

Martín