Hello Danilo,
Recently new user of mach4 and CS-lab system, I discover the same problem than you speak about.
Did you solve it ? I'm surpised to have the problem for more than one year ...
I solved it for the moment by desactivating the mapping in the controle table, and doing the "mapping" using pmc ladder programm.
In a rung, you put a contact which is the soft output, and then a coil which is the cs lab output. The problem is this is very long time to do the programm, and not easy to have a clear overview of the mapping.
Regards