Parameter Setting; Programming - Siemens SINUMERIK 840D sl Function Manual

4.11.3

Parameter setting

Movement in the opposite direction
The response while traversing in the opposite direction, i.e.,against the direction of the
approaching fixed point depends on the setting of Bit 2 in the machine data:
MD10735 $MN_JOG_MODE_MASK (settings for the JOG mode)
Bit
2
Fixed point positions
A maximum of 4 fixed point positions can be defined for each axis via the following machine
data:
MD30600 $MA_FIX_POINT_POS[n]
Number of valid fixed point positions
The number of valid fixed point positions of an axis is defined via the machine data:
MD30610 $MA_NUM_FIX_POINT_POS
Note
An exception is for "Approaching fixed point with G75". Two fixed point positions can also be
approached here in the setting MD30610 = 0.
4.11.4

Programming

System variables
The following system variables that can be read in the part program and in the synchronous
actions for the "Approach fixed point" function.
System variable
$AA_FIX_POINT_SELECTED [<Axis>]
$AA_FIX_POINT_ACT [<Axis>]
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Value Description
0 Travel in the opposite direction is not possible (default setting).
1 Movement in the opposite direction is possible.
Manual and Handwheel Travel (H1)
4.11 Approaching a fixed point in JOG
Description
Number of fixed point to be approached
Number of the fixed point on which the axis is
currently located
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