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NC Commissioning with HMI Advanced
11.5 Axes and spindles
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
409
11.5.11 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 positioning axes
A channel axis is assigned to the PLC by default via the following machine data:
●
MD30450 $MA_IS_CONCURRENT_POS_AX (concurr. positioning axis) = 1
To traverse it from the part program later, it must be requested explicitly using a part
program statement (GET).
Positioning axis feedrate
If a positioning axis is programmed in the part program without specifying an axis-specific
feedrate, the feedrate entered in the following machine data is applicable to this axis
automatically:
●
MD32060 $MA_POS_AX_VELO (initial setting for positioning axis velocity)
This feedrate will apply until an axis-specific feedrate is programmed in the part program for
this axis.
Machine data
Table 11-27 Positioning axes: Machine data
Number Name Name
Channelspecific ($MC_ ... )
22240
AUXFU_F_SYNC_TYPE Output timing of F functions
Axisspecific ($MA_ ... )
30450
IS_CONCURRENT_POS_AX Concurrent positioning axis
32060 POS_AX_VELO Feedrate for positioning axis
Interface signals
Table 11-28 Positioning axes: Interface signals
DB number Bit, byte Name
Axis/spindle-specific Signals from PLC to axis/spindle
31,... 0 Feedrate override, axis-specific
31,... 2.2 Delete distance-to-go, axis-specific
Signals from axis/spindle to PLC
31,... 74.5 Positioning axis
31,... 78-81 F function (feedrate) for positioning axis
References:
/FB/ Function Manual - Extended Functions, P2 Positioning axes