help to connect alarm signal driver hbs86h

The problem is that when the driver fails the red LED does not light up. On the other hand, if I disconnect the driver from the bob, the red LED does turn on. I am doing all the tests with a single driver and the only input I have free.

And in that case i would try to set Alarm level parameter. Maybe your AMP show foults in different way. In this case you have to simple invert Relay connection and joint.0.amp-fault-in