Siemens SINUMERIK 808D Parameter Manual

The MD should only be set for those channels in which free-form surfaces are also
machined.
0 : default LookAhead is active.
> 0 : extended LookAhead is active if switched on by MD20443 $MC_LOOKAH_FFORM.
The set value for free-form surface applications is: 18.
28540 MM_ARCLENGTH_SEGMENTS C02 B1
- Number of memory elements for arc length function representation DWORD PowerOn
-
808d-me42 - 0, 0, 0, 0, 0, 0, 0, 0... 0 100 0/0 S
808d-me62 - 5 0 100 1/1 M
808d-te42 - 0, 0, 0, 0, 0, 0, 0, 0... 0 100 0/0 S
808d-te62 - 0, 0, 0, 0, 0, 0, 0, 0... 0 100 0/0 S
808d-mte40 - 0, 0, 0, 0, 0, 0, 0, 0... 0 100 0/0 S
808d-mte60 - 0, 0, 0, 0, 0, 0, 0, 0... 0 100 0/0 S
Description: Number of memory elements available for the arc length function for parameterizing
polynomials.
If this machine data is equal to zero, a fixed interval division is used to represent
the arc length function. In this case, the calculated function is only tangent-
continuous. This can lead to discontinuities in the axis accelerations.
If the function G643 or G644 is used for smoothing and/or COMPCAD or COMPSURF, this MD
should be assigned a value of at least 10. In this case, the function also has a
constant curvature which results in a smoother progression of the path velocity, as
well as the axis velocities and accelerations.
A value of 10 is sufficient when using COMPSURF and 3-axis applications.
Up to 20 may be useful for COMPSURF and 5-axis applications.
28560 MM_SEARCH_RUN_RESTORE_MODE C02 K2
- Data restore after simulation DWORD PowerOn
-
- - 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0...
0 0x00000001 1/1 M
Description: Bit mask to restore data after cancelation of a simulated program execution. The
following applies:
Bit 0: All frames in the data storage are restored.
3.4 Axis-specific machine data
30100 CTRLOUT_SEGMENT_NR EXP, A01 G2, S9
- Setpoint assignment: bus segment number BYTE PowerOn
-
808d-me42 1 0 0 0 ReadOnly M
808d-me62 1 5 0 5 2/2 M
808d-te42 1 0 0 0 ReadOnly M
808d-te62 1 5 0 5 2/2 M
808d-mte40 1 0 0 5 7/2 M
808d-mte60 1 5 0 5 7/2 M
Description: In this MD, enter the number of the bus segment through which the output is addressed.
Machine data
3.4 Axis-specific machine data
Parameter Manual
220 List Manual, 01/2017

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English