panasonic GIII

I do not understand the question, could you please submit the question in different words or in your own language so I can give google translate a try?
I guess you want to have the welding on signal for external use?
Or do you want to turn on / off welding from the outside world?

In case you want an output to indicate welding is enabled / disabled (F3 in test mode).
In the upper menu bar click on “set”.
Goto “In / out”, “Status input output” and click on Weld off status output.
Check valid and select (browse) the output you want to use.

In case you want to turn on or off welding by means of an input;
In the upper menu bar click on “set”.
Goto “In / out”, “Status input output” and click on Weld off status output.
Check valid and select (browse) the input you want to use.

In case you want an output to indicate if welding is on (arc-on);
In the upper menu bar click on “set”.
Goto “In / out”, “Status input output” and click on arc-on output.
Check valid and select (browse) the output you want to use.
I hope this will help.