Siemens SINUMERIK 808D Parameter Manual page 224

Machine data
3.4 Axis-specific machine data
30242 ENC_IS_INDEPENDENT
- Encoder is independent
-
- 1
Description:
If actual value corrections performed by the NC on the encoder selected for position
control are not to influence the actual value of any other encoder defined in the same
axis, then the position control encoder must be declared to be "independent".
Actual value corrections include the following:
●
Modulo treatment,
●
Reference point approach,
●
Measuring system calibration,
●
PRESET
Example:
MD30200 $MA_NUM_ENCS[ AX1 ] = 2
MD30242 $MA_ENC_IS_INDEPENDENT[ 0, AX1 ] = 0
MD30242 $MA_ENC_IS_INDEPENDENT[ 1, AX1 ] = 1
When the VDI interface has selected the first encoder for position control, the above
mentioned actual value corrections will be executed on this encoder only.
When the VDI interface has selected the second encoder for position control, the above
mentioned actual value corrections will be executed on both encoders.
The machine data is therefore only valid for encoders that have not been selected by
the VDI interface for positon control (passive encoders).
As from SW5, the scope of functions has been extended:
MD30242 $MA_ENC_IS_INDEPENDENT = 2
In reference mode MD34200 $MA_ENC_REFP_MODE = 3 (distance-coded reference marks), the
passive encoder is automatically referenced with the next traversing movement after
zero mark distance overtravel. This is done independently of the current mode setting.
MD30242 $MA_ENC_IS_INDEPENDENT = 3
In contrast to MD30242 $MA_ENC_IS_INDEPENDENT = 1, modulo actual value corrections are
executed in the passive encoder of modulo rotary axes.
30250 ACT_POS_ABS
- Internal encoder position
ODLD, -, -
808d-me42 1
808d-me62 1
808d-te42 1
808d-te62 1
808d-mte40 1
808d-mte60 1
Description:
The actual position (hardware counter status only without machine reference) is stored
(in internal format display) in this MD.
At power ON (or encoder activation), it acts with:
●
Absolute encoders:
To restore the current position (in combination with the position, possibly with
several meanings, buffered in the encoder).
●
Incremental encoders:
To buffer the actual value beyond power OFF when the functionality is activated
MD34210 $MA_ENC_REFP_STATE = 1 or. 2 (i.e. as a reference point replacement).
To buffer the actual value beyond power OFF when the functionality is activated
MD34210 $MA_ENC_REFP_STATE = 3 (i.e. as a restored position value).
224
0, 0 0
0.0, 0.0 -
0.0, 0.0 -
0.0, 0.0 -
0.0, 0.0 -
0.0, 0.0 -
0.0, 0.0 -
A02, A11 G2, R1
BYTE NEW CONF
3 1/1
EXP, A02, A08 R1
DOUBLE PowerOn
- 1/1
- 1/1
- 1/1
- 1/1
- 7/2
- 7/2
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Parameter Manual
List Manual, 01/2017