Siemens SINUMERIK 840D sl Function Manual page 487

Figure 6-4
● The PLC can request and traverse an axis at any time and in any operating mode.
TYPE display
Figure 6-5
In principle, the PLC must set the signal "Request new type". It is deleted again after
change. This also applies to a channel change with GET and RELEASE.
● The PLC can change an axis from one channel to another.
PLC axes and PLC spindles are traversed via special function modules in the basic PLC
program.
FC15: POS_AX Positioning of linear and rotary axes
FC16: PART_AX Positioning of indexing axes
FC18: SpinCtrl Spindle control
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Changing an axis from K1 to K2 via part program
TYPE display axis replacement via PLC
Mode Groups, Channels, Axis Replacement (K5)
Axis/spindle replacement
487