Positioning Axes - Siemens SINUMERIK 840Di Manual

10 NC Start-Up with HMI Advanced
10.5 Axes and spindles

10.5.11 Positioning axes

Concurring
positioning axes
Positioning axis
feedrate
Machine data
Table 10-29 Positioning axes: Machine data
Number
Channel-specific ($MC_ ...)
22240 AUXFU_F_SYNC_TYPE
Axis-specific ($MA_ ...)
30450 IS_CONCURRENT_POS_AX
32060 POS_AX_VELO
Interface signals
Table 10-30 Positioning axes: Interface signals
DB number Bit, Byte
Axis/spindle-specific
31,... 0
31,... 2.2
31,... 74.5
31,... 78–81
References
10-328
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.
The machine data
S
MD30450: IS_CONCURRENT_POS_AX (concurr. positioning axis) = 1
is used to assign the PLC a channel axis by default. To traverse it from the parts
program later, it must be requested explicitly using a parts program statement
(GET).
If a positioning axis is programmed in the parts program without specifying an
axis-specific feedrate, the feedrate entered in
S
MD32060: POS_AX_VELO (initial setting for positioning axis velocity
will apply to this axis automatically.
This feedrate will apply until an axis-specific feedrate is programmed in the
parts program for this axis.
Identifier
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
/FB/ Description of Functions, Extended Functions,
P2 Positioning axes
Name
Output time for F functions
Concurring positioning axis
Feedrate for positioning axis
Name
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
06.03
Ref.
H2
Ref.