Siemens Sinumerik 840DiE sl - Positioning Axes

01/2007
11.5 Axes and spindles
11-332
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
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 part 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 part
program later, it must be requested explicitly using a part program statement
(GET).
If a positioning axis is programmed in the part 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 part
program for this axis.
Table 11-28 Positioning axes: Machine data
Number Identifier Name Refer-
ence
Channel–specific ($MC_ ... )
22240 AUXFU_F_SYNC_TYPE Output timing of F functions H2
Axis–specific ($MA_ ... )
30450 IS_CONCURRENT_POS_AX Concurrent positioning axis
32060 POS_AX_VELO Feedrate for positioning axis
Table 11-29 Positioning axes: Interface signals
DB number
Bit, byte Name Refer-
ence
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
Concurrent
positioning axes
Positioning axis
feed
Machine data
Interface signals
References
11 NCK Commissionin
g
with HMI Advanced