06.03
10.5 Axes and spindles
10-328
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
10.5.11
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.
The machine data
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
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.
Table 10-29
Positioning axes: Machine data
Number
Identifier
Name
Ref.
Channel-specific ($MC_ ...)
22240
AUXFU_F_SYNC_TYPE
Output time for F functions
H2
Axis-specific ($MA_ ...)
30450
IS_CONCURRENT_POS_AX
Concurring positioning axis
32060
POS_AX_VELO
Feedrate for positioning axis
Table 10-30
Positioning axes: Interface signals
DB number
Bit, Byte
Name
Ref.
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
/FB/
Description of Functions, Extended Functions,
P2 Positioning axes
Concurring
positioning axes
Positioning axis
feedrate
Machine data
Interface signals
References
10 NC Start-Up with HMI Advanced
