Siemens SINUMERIK 840D sl Function Manual page 259

03.06
36942
MD number
Special cases, errors,...
36944
MD number
Default value: 0.01
Change becomes effective after: Power ON
Data type: DOUBLE
Significance:
Special cases, errors,...
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
$MA_SAFE_POS_TOL
Tolerance, actual value comparison (crosswise)
S
"Finger protection" (approx. 10 mm) is the primary consideration when setting this toler-
ance value.
S
Stop response STOP F is activated when the tolerance bandwidth is violated.
$MA_SAFE_REFP_POS_T OL
Tolerance, actual value comparison (referencing)
Min. input limit: 0
Protection level: 7/2
This machine data specifies the tolerance for checking the actual values after referencing
(for incremental encoders) or when powering-up (for absolute encoders).
An absolute actual axis position is determined by referencing.
A second absolute actual position is calculated from the last stop position that was saved
prior to the control being powered-down and the distance traversed since power-on. The
control system checks the actual values after referencing on the basis of the two actual
positions, the traversed distance and this machine data.
The following factors must be taken into consideration when calculating tolerance values:
Backlash, leadscrew errors, compensation (max. compensation values for SSFK, sag and
temperature compensation), temperature errors, torsion (2-encoder system), gearbox play
for selector gearboxes, coarser resolution (2-encoder system), oscillating distance/range
for selector gearboxes.
If these two actual positions deviate from one another by more than the value set in this
data – with a valid user agreement – then Alarm 27001 is output with Fault code 1003 and a
new user agreement is required for referencing.
8.1 Machine data for SINUMERIK 840D sl
Max. input limit: 36 degree
Data Description
Units: mm, degrees
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