Siemens SINUMERIK 840D sl Function Manual page 365

36938
corresponds with ...
Additional reference
36940
MD number
Default value: 0.1
Change becomes effective after: POWER ON
Data type: DOUBLE
Meaning:
Special cases, errors,...
Additional reference
36942
MD number
Default value: 0.1
Change becomes effective after: POWER ON
Data type: DOUBLE
Meaning:
Special cases, errors,...
Safety Integrated
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
$MA_SAFE_CAM_TRACK_ASSIGN[0...29]
MD36903 $MA_SAFE_CAM_ENABLE
MD36936 $MA_SAFE_CAM_POS_PLUS[n]
MD36937 $MA_SAFE_CAM_POS_MINUS[n]
MD37900 $MA_SAFE_CAM_TRACK_OUTPUT[n]
MD37901/37902/37903/37904 $MA_SAFE_CAM_RANGE_OUTPUT_1/2/3/4[n]
MD37906/37907/37908/37909 $MA_SAFE_CAM_RANGE_BIN_OUTPUT_1/2/3/4[n]
/FBSIsl/ see Chapter "Safety software cams and safety cam track (SN) (Page 157)"
$MA_SAFE_CAM_TOL
Tolerance for Safe Cams
Min. input limit: 0.001
Due to the different mounting locations of the encoders and variations in clock cycle and signal
transit (propagation times), the cam signals of the two monitoring channels never switch at
precisely the same position and never simultaneously.
This data specifies the tolerances for all cams as a load-side distance. The monitoring chan‐
nels may have different signal states for the same cam within this tolerance bandwidth, without
generating Alarm 27001.
Recommendation:
Enter the same value as in MD36942 $MA_SAFE_POS_TOL or slightly higher.
/FBSIsl/ see Chapter "Safety software cams and safety cam track (SN) (Page 157)"
$MA_SAFE_POS_TOL
Tolerance, actual value comparison (crosswise)
Min. input limit: 0.001
Due to the fact that encoders are not mounted at identical locations and the effect of backlash,
torsion, leadscrew errors etc. the actual positions sensed simultaneously by the NCK and drive
may differ from one another.
The tolerance bandwidth for the crosswise comparison of the actual positions in the two mon‐
itoring channels is specified in this machine data.
When defining this tolerance value, primarily the values from the machine-specific risk analysis
must be taken into account.
Stop response STOP F is activated when the tolerance bandwidth is violated.
9.1 Machine data for SINUMERIK 840D sl
Protection level: 7/2
Protection level: 7/2
Data descriptions
Max. input limit: 10
Unit: mm, inches, degrees
Max. input limit: Linear axis 10 mm/inch,
Max. input limit: Rotary axis 360 de‐
grees
Unit: mm, inches, degrees
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