Centroid Acorn Controller - Has anyone tried one?

[m_c]

Ok think we are looking at two different pieces of code here. I've just downloaded Chaz's file and you could be correct.!!
Looks like ToolTurretPosBit1 uses the tool counter when in incremental mode and then toggles tool position each time this increments.

However Still not sure thou because how does the tool position get incremented inside the PLC.?

I'm only going by the code snippet Chaz posted, but it looks to me like if you enable incremental mode, it expects you to link an input, along with a directional command, and the rest is then handled behind the scenes.
However, I would still expect you to be able to directly change the tool position, to allow for tool changer homing routines, and recovery of changers that have no home sensor.