Another plasma component...

Could you post the GCode file.

I used the sample GCode from the documentation

And tried other GCodes, the result is the same.
How should this function work, the plasmac should wait for the arcOK?
It seems like the plasmac does not see the signal of the arcOK and repeats attempts many times.

Have you enabled multi spindle in your <machine>_connections.hal?

EDIT: Does the Arc OK led on the Monitor Panel light?

What GUI are you using?

Yes I enabled multi spindle and changed the number of spindles to 3 in the ini file.
I use Axis GUI.

And Arc OK led light on the Monitor Panel and on HAL Show too

Are you using a sim or a real config?

What value do you have for Torch On Time in the Config Panel?

Acually it doesn't wait for Arc OK, it uses the above time.