Disturbance Characteristic; Rapid Stop - Siemens SINUMERIK 840D Function Manual

Example 2: Couplings with a maximum of one active leading axis/spindle
With the following calls, the CP-SW limit monitoring is executed – including the transfer of the
brake to the leading axis – if MD30455 MA_MISC_FUNCTION_MASK[AX2] bit 11 is set:
TRAILON(Y,X,0.5) ;
EGDEF(Y,X,1) ;
EGON( Y,"FINE",X,1,2) ;
14.5.12

Disturbance characteristic

14.5.12.1

Rapid stop

Function
The rapid stop stops the axis / spindle without ramp, i.e. the velocity setpoint value is specified
as zero. This default applies the brakes at the current limit. The servo enable is retained.
The rapid stop is set at:
● Stop A and Stop C (Safety Integrated)
● Alarms with rapid stop as configured braking behavior
● Reaching the hardware limit switch and rapid stop as configured braking behavior:
MD36600 $MA_BRAKE_MODE_CHOICE = 1
Switchover to actual-value coupling.
The actual values of the leading spindle are used to calculate the setpoint values as soon as the
rapid stop of the leading spindle is reported to a generic coupling.
The changeover to actual value coupling takes place smoothly and remains active till the servo
enable as well as the pulse enable is available again to the leading spindle and no more position
offset takes place. The setpoint value calculation is programmed as with CPLSETVAL only if
these conditions are fulfilled.
Note
A rapid stop that was initiated on reaching the hardware limit switch does not changeover the
actual value coupling.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Definition and switching in the coupling of the coupled motion
axis Y two leading axis X.
Definition of an EG axis group with setpoint coupling
from X to Y (following axis).
Activating coupling.
M3: Coupled axes
14.5 Generic coupling
557