Siemens SINUMERIK 808D ADVANCED Parameter Manual page 289

36300 ENC_FREQ_LIMIT
- Encoder limit frequency
-
- 1
Description:
This MD is used to enter the encoder frequency, which,
in general, is a manufacturer specification (type plate, documentation).
For PROFIdrive:
No automatic, software-internal limitation for encoders on the PROFIdrive drive; here,
the limit values of the measuring circuit module depend on the drive hardware used,
i.e. known only by the drive. Therefore, it is the user who is responsible for taking
into account the limit frequency of the measuring circuit module.
36302 ENC_FREQ_LIMIT_LOW
% Encoder limit frequency for new encoder synchronization.
-
- 1
Description:
Encoder frequency monitoring uses a hysteresis.
MD36300 $MA_ENC_FREQ_LIMIT defines the encoder limit frequency. The encoder is
switched off when this frequency is exceeded. The encoder is switched on again when
the frequency falls below that defined in MD36302 $MA_ENC_FREQ_LIMIT_LOW.
MD36300 $MA_ENC_FREQ_LIMITis entered directly in Hertz,
whereas MD36302 $MA_ENC_FREQ_LIMIT_LOW is a fraction, expressed as a percentage, of
MD36300 $MA_ENC_FREQ_LIMIT.
MD36302 $MA_ENC_FREQ_LIMIT_LOW is therefore already correctly preset for most of the
encoders used.
Exception: In the case of absolute encoders with an En-Dat interface, the limit
frequency of the absolute track is significantly lower than the limit frequency of the
incremental track. A low value in MD36302 $MA_ENC_FREQ_LIMIT_LOW ensures that the
encoder is not switched on again until it falls below the limit frequency of the
absolute track, and therefore is not referenced until permitted by the absolute track.
For spindles, this referencing is carried out automatically.
Example EnDat encoder EQN 1325:
Limit frequency of the electronics of the incremental track: 430 kHz
===> MD36300 $MA_ENC_FREQ_LIMIT = 430 kHz
The limit frequency of the absolute track is approx. 2000 encoder rpm at 2048
increments/encoder revolution, i.e. the limit frequency is 2000/60 * 2048 Hz = 68 kHz
===> MD36302 $MA_ENC_FREQ_LIMIT_LOW = 68/430 = 15%
36310 ENC_ZERO_MONITORING
- Zero mark monitoring
-
- 1
Description:
This MD is used to activate zero mark monitoring.
For PROFIdrive drives (the corresponding diagnostics system variables are not
currently supplied for incremental measuring systems):
For PROFIdrive, the permissible deviation must be set in the drive, *not* in the NC.
Zero mark monitoring reported by the drive is mapped to the NCK according to the
following rule:
0:
Parameter Manual
Parameter Manual, 08/2015, 6FC5397-8EP40-0BA1
333000, 3.0e5
99.9, 99.9
0, 0
no zero mark monitoring
EXP, A02, A05,
A06
DOUBLE
0.0 -
EXP, A02, A05,
A06
DOUBLE
0 100
EXP, A02, A05
DWORD
0 -
Machine data
3.4 Axis-specific machine data
A3, D1, R1, Z1
PowerOn
2/2
A3, R1, S1, Z1
NEW CONF
2/2
A3, R1
NEW CONF
2/2
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