Siemens SINUMERIK 840D sl Function Manual page 130

Safety functions integrated in the system/drive
7.3 Safe Stops A-F
Figure 7-7
The following actions take place at the following instants in time:
t1:
STOP F occurs, ESR is started
t2:
500 ms after t1, braking starts along the parameterized ramp
t3:
STOP B is initiated 2.5 s after t1. The axis is already stationary at this time, which means that
the pulses can be immediately cancelled.
Example 2 - delaying the transition from STOP F to STOP B
The same parameterization as in example 1 is shown in the following diagram. However, when
a STOP F occurs, no monitoring function is active. At instant in time t2, a monitoring function
is activated. ESR is only started if there is a STOP F with active monitoring function.
Figure 7-8
The following actions take place at the following instants in time:
t1:
STOP F occurs, no response
t2:
at any time after t1, a monitoring function is activated. At this instant in time, the transition to
a STOP B is started and bits 1 in $A_XFAULTSI and $VA_XFAULTSI of this axis are set.
130
Velocity characteristic of an SI axis when stopping with STOP F
Velocity characteristic of an SI axis when stopping with STOP F
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated