Siemens SINUMERIK 840D Description Of Functions page 246

4 Data Descriptions
4.2 Machine data for SIMODRIVE 611 digital
When passing the active, lower limit value, the drive initiates an alarm (this can
be parameterized using MD 1362: $MD_SAFE_POS_STOP_MODE) and
switches into the safe operating stop condition.
1336 $MD_SAFE_CAM_POS_PLUS[n]
Plus cams position for safe cams
Unit: µm or 0.001 Default:
10 000
degrees
Absolute position for plus cams.
n = 0, 1, 2, 3 stands for plus cams SN1+, SN2+, SN3+, SN4+
If the safe actual position is greater than the machine data, then the safety-
relevant output (SGA) assigned to this cam, is set to 1.
1337 $MD_SAFE_CAM_POS_MINUS[n]
Minus cams position for safe cams
Unit: µm or 0.001
Default:
-10 000
degrees
Absolute position for minus cams.
n = 0, 1, 2, 3 stands for minus cams SN1-, SN2-, SN3-, SN4-
If the safe actual position exceeds the position set in the machine data, then the
SGA assigned to the relevant cam is set to 1.
1340 $MD_SAFE_CAM_TOL
Tolerance for safe cams
Unit: µm or 0.001 Default:
degrees 100
Tolerance threshold for all safe cams.
As a result of the minimum measuring, computational and runtime deviations,
the two monitoring channels (NC and drive) rarely detect when a cam position
is passed at exactly the same time and at exactly the same position. This data
creates a tolerance window within which cam results in the two monitoring
channels may deviate without resulting in an error.
Cam tolerance and actual value tolerance (MD 1342) should be identical.
1342 $MD_SAFE_POS_TOL
Actual value tolerance, crosswise data comparison
Unit: Default:
µm or 100
mdegrees
Tolerance threshold for the crosswise data comparison of the position actual
value between the NC and drive. This machine data creates a tolerance
window within which the position actual values of the NC and drive may deviate
from one another.
"Finger protection" (about 10 mm) is the primary consideration when setting this
tolerance value.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Minimum value: Maximum value:
-2 147 000 000 2 147 000 000
Minimum value: Maximum value:
-2 147 000 000 2 147 000 000
Minimum value: Maximum value
1 10 000
Minimum value: Maximum value:
1 360 000
611digital
Relevant for:
FD/MSD
Data type: Becomes
long integer effective:
POWER ON
611digital
Relevant for:
FD/MSD
Data type: Becomes
long integer effective:
POWER ON
611 digital
Relevant for:
FD/MSD
Data type: Becomes
long integer effective:
POWER ON
611 digital
Relevant for:
FD/MSD
Data type: Becomes
long integer effective:
POWER ON
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11.03