Siemens SINUMERIK 808D ADVANCED Operating Instructions Manual page 249

34050 REFP_SEARCH_MARKER_REVERSE
- Direction reversal to reference cam
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- 1
This MD can be used to set the direction of search for the zero mark:
Description:
MD34050 $MA_REFP_SEARCH_MARKER_REVERSE = 0
Synchronization with falling reference cam signal edge
The machine axis accelerates to the velocity specified in MD34040
$MA_REFP_VELO_SEARCH_MARKER (reference point creep velocity) in the opposite
direction to that specified in MD34010 $MA_REFP_CAM_DIR_IS_MINUS (reference
point approach in minus direction).
If the axis leaves the reference cam (NC/PLC interface signal DB380x
DBX1000.7 (Reference point approach delay) is reset) the control is synchro-
nized with the first zero mark.
MD34050 $MA_REFP_SEARCH_MARKER_REVERSE = 1
Synchronization with rising reference cam signal edge
The machine axis accelerates to the velocity defined in MD34020
$MA_REFP_VELO_SEARCH_CAM (reference point creep velocity) in the opposite
direction to that specified in the MD34010 $MA_REFP_CAM_DIR_IS_MINUS. If the
axis leaves the reference cam (NC/PLC interface signal DB380x DBX1000.7 (Ref-
erence point approach delay) is reset), the machine axis decelerates to a
halt and accelerates in the opposite direction towards the reference cam at
the velocity specified in MD34040: $MA_REFP_VELO_SEARCH_MARKER. When the ref-
erence cam is reached (NC/PLC interface signal DB380x DBX1000.7 (Reference
point approach delay) is enabled) the control is synchronized with the first
zero mark.
MD irrelevant to:
Linear measuring systems with distance-coded reference marks
34060 REFP_MAX_MARKER_DIST
mm, degrees maximum distance to reference mark
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- 1
For incremental measuring systems:
Description:
If, after leaving the reference cam (NC/PLC inte rface signal DB380x DBX1000.7
(Reference point approach delay) is reset), the machine axis travels a dis-
tance defined in MD34060: $MA_REFP_MAX_MARKER_DIST without detecting the zero
mark, the axis stops and alarm 20002 "Zero mark missing" is output.
For linear measuring systems with distance-coded reference marks:
If the machine axis travels a distance defined in MD34060
$MA_REFP_MAX_MARKER_DIST from the st arting position without crossing two zero
marks, the axis stops and alarm 20004 "Reference mark missing" is output.
Siemens Controls
Parameter Manual
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
FALSE, FALSE 0
20.0, 20.0, 20.0, (0./ 0.)
20.0, 20.0, 20.0...
2.4 Axis-specific machine data
A03, A11 G1,R1
BOOLEAN Reset
- 2/2
A03, A11 G1,R1,S1
DOUBLE Reset
(1.e300/ 1.e300) 2/2
Machine data
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