Hi Yorgos,
The static value of a Port ('K Pitch Bend input" in this case), which is the value that you set when using the command "k pitch bend input to - 1 set", only takes effect when there is no connection to that Port. As you may be aware the Roll Output Port of the upstream Recorder is currently connected to the K Pitch Bend Input Port on the Scaler, therefore assigning key pitch bend to key roll as opposed to responding to the static value.
Adjustment to the range or turning off of key pitch bend can be done by adjusting the value of the 'K Bend Range Input' Port on the Scaler. This sets the value (in semitones) of pitch bend in each direction, so setting it to '0' will effectively turn it off.
The reversing and other manipulation of signals as you describe above is commonly done within EigenD by the Ranger Agent. This does involve the making and breaking of Belcanto connections, as well as the creation of new Agents, which is not currently documented.
Please do let us know if you have any other questions.
Sam
Eigenlabs Software Department