Siemens SINUMERIK 840D sl Function Manual page 92

A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
Block change criterion: Clamping tolerance
After activation of clamping monitoring (DB31, ... DBX2.3 = 1), the block change criterion for
traversing blocks in which the axis stops at the end of the block no longer acts as the
corresponding exact-stop condition, but rather as the configured clamping tolerance:
MD36050 $MA_CLAMP_POS_TOL (clamping tolerance with interface signal "Clamping
active")
Behavior upon releasing of the clamp
If the axis was moved by the clamping process, it is returned by the NC to the position setpoint
after releasing of the clamp and setting of the servo enable state. Repositioning depends on
whether "Follow-up mode" was activated for the axis:
● Without follow-up mode:
● With follow-up mode:
See also interface signal DB31, ... DBX1.4 (follow-up mode).
Note
The following interface signals can be evaluated by the PLC user program as the criterion for
activation of the "Follow-up mode":
DB31, ... DBX60.6 / 7 (position reached with exact stop coarse/fine)
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Repositioning by position controller
Repositioning by interpolator
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions