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

EGDEF(Y,X,1) ;
EGON( Y,"FINE",X,1,2) ;
8.5.12

Disturbance characteristic

8.5.12.1

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.
Response of the following spindle
If a rapid stop is detected for a leading spindle and the following spindle does not execute any
rapid stop by itself, then the following spindle tries to follow the dynamics of the movement of
the leading spindle defined within its framework. As position synchronization is generated,
there may be oscillations in the following axis in relation to the position to be approached.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Definition of an EG axis group with setpoint coupling
from X to Y (following axis).
Activating coupling.
M3: Coupled axes
8.5 Generic coupling
433