Application Example - Siemens SINUMERIK 840D Function Manual

17.9.5

Application example

Target
A rotary axis (machine axis 4 [AX4]) is to be moved to fixed point 2 (90 degrees) with the
"Approaching fixed point in JOG" function.
Parameter assignment
The machine data for the "Approaching fixed point" function of machine axis 4 are
parameterized as follows:
MD30610 $MA_NUM_FIX_POINT_POS[AX4] = 4
MD30600 $MA_FIX_POINT_POS[0,AX4] = 0
MD30600 $MA_FIX_POINT_POS[1,AX4] = 90
MD30600 $MA_FIX_POINT_POS[2,AX4] = 180
MD30600 $MA_FIX_POINT_POS[3,AX4] = 270
Initial situation
Machine axis 4 is referenced and is at position of 0 degrees. This corresponds to the 1st fixed
position and is output through the NC/PLC interface signal:
DB31 DBX75.0 = 1 (bit 0 - 2 = 1)
Approaching fixed point 2
The control is switched into the JOG mode.
The "Approaching fixed point" function is activated at fixed point 2 via the NC/PLC interface
signal:
DB31 DBX13.1 = 1 (bit 0 - 2 = 2)
The actuation is confirmed via the NC/PLC interface signal:
DB31 DB75.1 = 1 (bit 0 - 2 = 2)
The plus travel key on the machine control panel is used to travel continuously to approach
fixed point 2.
The machine axis 4 stops at the 90 degree position. This is signaled via the NC/PLC interface
signal:
DB31 DBX75.4 = 1 (bit 3 - 5 = 2)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
H1: Manual traversing
17.9 Approaching a fixed point in JOG
4 fixed points are defined for machine
axis 4.
1. Fixed point of AX4 = 0 degrees
2. Fixed point of AX4 = 90 degrees
3. Fixed point of AX4 = 180 degrees
4. Fixed point of AX4 = 270 degrees
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