Programming; Boundary Conditions - Siemens SINUMERIK 840D Function Manual

MD30455 $MA_MISC_FUNCTION_MASK (axis functions)
Bit
11
14.5.11.3

Programming

Transferring the brake to the leading axes
For generic couplings, type "freely programmable" (CPSETTYPE[FAx] = "CP"), by
programming the coupling property CPMBRAKE (see "Reaction to stop signals and commands
(CPMBRAKE) (Page 535)") it can be set as to whether the brake of the following axis, initiated
using the "CP-SW limit monitoring" function, should also be transferred to the leading axes.
14.5.11.4

Boundary conditions

Possible fault sources
If the axes do not brake as required, this could be due to the following reason:
At least one leading axis does not react to the brake, because it is also a leading axis in its own
right (cascade), and the brake is not transferred to its leading axes. A brake is only transferred
to the leading axes (recursive), if the following applies for the following axes involved:
CPSETTYPE[FAx] = "CP" and CPMBRAKE[Fax] bit 0 = 1
Even if all of the axes brake as required, the contour can be violated as a result of different
acceleration rates and/or coupling factors if these values have not been appropriately
configured and/or programmed.
Even if all of the previous preconditions are fulfilled, there are still some reasons why it cannot
be avoided that a following axis passes a software limit switch:
● The actual maximum acceleration of a leading axis changes.
● The actual maximum acceleration of the following axis becomes smaller.
● The velocity of the following axis when switching in the coupling or when the CP-SW limit
monitoring responds is already so high that with the actual
maximum acceleration it is no longer possible to stop the axis in the appropriate time.
If the axis cannot be stopped in the appropriate time, then as before, the previous software limit
switch monitoring responds, and stops the following axis at the software limit switch.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Value Meaning
0 CP SW limit monitoring is not active.
1 CP SW limit monitoring is active.
M3: Coupled axes
14.5 Generic coupling
555