Siemens sinumerik 840D sl Function Manual page 534

RESET response
CLC(0) is executed implicitly on a reset (NC RESET or end of program).
Parameterizable RESET response
The reset response of a 1D clearance control function can be determined via the channel-
specific NCK OEM machine data:
• MD62524 $MC_CLC_ACTIVE_AFTER_RESET (reset response with active CLC)
The following response can be parameterized:
• MD62524 $MC_CLC_ACTIVE_AFTER_RESET = 0
• MD62524 $MC_CLC_ACTIVE_AFTER_RESET = 1
Caution
The following channel-specific NCK OEM machine data is only effective in conjunction with a
1D clearance control function:
• MD62524 $MC_CLC_ACTIVE_RESET (reset response with active CLC)
For 3D clearance control, CLC(0) is always effective in the event of a RESET.
Boundary conditions
Please note the following boundary conditions:
Continuous-path mode
Activating/ deactivating clearance control (CLC(
(G64/G64x) will induce a drop in velocity for path motions. To avoid voltage drops of this
type, clearance control must be activated before a path section with constant path velocity.
During the corresponding path section, if necessary, clearance control can be blocked and
then re-enabled via the programmed gain factor for clearance control (CLC_GAIN).
Block change with exact stop
If exact stop is active at the end of the block (G60/G09 with G601/G602) the block change
may be delayed due to axis movements induced by the clearance control sensor signal.
Special functions: Clearance Control (TE1)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
In the event of a RESET, the clearance control function responds as it does to
deactivation with CLC(0) (see above: activation/deactivation modes).
The current state of the clearance control function is retained.
mode
)) during active continuous-path mode
Detailed description
2.6 Programming
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