Positioning Axes - Siemens SINUMERIK 840D sl Commissioning Manual

NCK start-up
10.5 Parameterize axis data
10.5.5

Positioning axes

Positioning axes are channel axes traversing parallel to the path axes without interpolating
with them.
Positioning axes can be traversed either from the parts program or from the PLC.
Concurrent machine axes
The machine data
● MD30450 IS_CONCURRENT_POS_AX (concurr. positioning axis) = 1
if a channel axis is defined neutral as a default. As a result no REORG takes place if the
axis/spindle is traversed by the PLC (FC18) or by synchronous actions.
Positioning axis feedrate
If a positioning axis is programmed in the parts program without specifying an axis-specific
feedrate, the feedrate entered in
● MD32060 POS_AX_VELO (initial setting for positioning axis velocity)
entered feed rate.
This feedrate will apply until an axis-specific feedrate is programmed in the parts program for
this axis.
Machine data
Table 10-16 Positioning axes: Machine data
Number Identifier
Channelspecific ($MC_ ... )
22240 AUXFU_F_SYNC_TYPE
axisspecific ($MA_ ... )
30450 IS_CONCURRENT_POS_AX
32060 POS_AX_VELO
Interface signals
Table 10-17 Positioning axes: Interface signals
DB number Bit, byte
Axis/spindle-specific
31,... 0
31,... 2.2
31,... 74.5
31,... 78-81
Literature
Function Manual Expanded Functions; Positioning axes
136
Name
Signals from PLC to axis/spindle
Feedrate override, axis-specific
Delete distance-to-go, axis-specific
Signals from axis/spindle to PLC
Positioning axis
F function (feedrate) for positioning axis
Name
Output timing of F functions
Concurrent positioning axis
Feedrate for positioning axis
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Reference
H2
Reference
IBN CNC: NCK, PLC, drive