Register a Digital signal with TestViewer

Hi, we are using TestViewer software to analize a external axis, with this ABB software we can see the curves of Torque, Speed, etc. of a External Axis. This is very usefull.

But also we need register when the this external axis are activated, may be reading the Signal that are used to activate the EAX.

How we can do it with the TestViewer software?.

Thanks in advance.

/Jorge