Plasmac hal output link

Hello everybody,
I try to set a panel for my plasma, i have linuxcnc 2.9.2 with qtplasmac gui.
I want external led when the program running/pause e.t.c.
With  i get that the pin is already linked from plasmac, i find than i need to unlink and link again the pins. Is that right? 

Thanks a lot Panos

You probably want just:

net machine-is-running hm2_7i96s.0.7i73.0.0.output-13

Thanks to your answer i get the point to overcome this and make it work. Much to understand yet but i am getting to it.
Thank you!