Parameter Manual
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
251
Machine data
2.4 Axis-specific machine data
Description: • Incremental encoder with zero mark(s):
After detection of the zero mark, the axis is positioned away from the zero
mark by the distance specified in MD34080 $MA_REFP_MOVE_DIST + MD34090
$MA_REFP_MOVE_DIST_CORR. After traversing this distance, the axis has reached
the reference point. MD34100 $MA_REFP_SET_POS is transferred into the actual
value.
During traversing by MD34080 $MA_REFP_MOVE_DIST + MD34090
$MA_REFP_MOVE_DIST_CORR, the override switch and MD11300
$MN_JOG_INC_MODE_LEVELTRIGGRD (jog/continuous mode) are active.
• Distance-coded measuring system:
MD34090 $MA_REFP_MOVE_DIST_CORR acts as an absolute offset. It describes the
offset between the machine zero and the first reference mark of the measuring
system.
• Absolute encoder:
MD34090 $MA_REFP_MOVE_DIST_CORR acts as an absolute offset.
It describes the offset between the machine zero and the zero point of the
absolute measuring system.
Note:
In conjunction with absolute encoders, this MD is modified by the control
during calibration processes and modulo offset.
With rotary absolute encoders (on linear and rotary axes), the modification
frequency also depends on the setting of MD34220 $MA_ENC_ABS_TURNS_MODULO.
Manual input or modification of this MD via the part program should therefore
be followed by a Power ON Reset to activate the new value and prevent it from
being lost.
The following applies to an NCU-LINK:
If a link axis uses an absolute encoder, every modification of MD34090
$MA_REFP_MOVE_DIST_CORR on the home NCU (servo physically available) is
updated only locally and not beyond the limits of the NCU. The modification
is therefore not visible to the link axis. Writing MD34090
$MA_REFP_MOVE_DIST_CORR through the link axis is rejected with alarm 17070.
34090 REFP_MOVE_DIST_CORR A03, A02, A08,
A11
G1,R1,S1,S3,G2
mm, degrees Reference point offset/absolute offset DOUBLE NEW CONF
-, -
- 1 0.0, 0.0 -1e12 1e12 2/2
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