Safety Integrated - Industry - Siemens

Emergency stop
Time Explanation
t1 Acknowledgement required prior to first start obligatory
t2 Drive is started via START.
t3 Activates emergency stop: fast stop is triggered
(OUT3=0).
t4 Option K80: pulse blocking
t5 Separating drive from network (only for readback error
of option K80).
t6 Unlocking the emergency stop button.
t7 Negative edge of acknowledgement signal: Activates the
contactor. OUT3 is reset to 1 signal. This is the prerequisite
for the drive to be restarted with OUT1=1 (not depicted).
Note
The above time curve for OUT3, K80, K2 and n would
also result if instead of triggering an emergency stop
at t3, the safety door (simulated here) would be
opened.
Note
The drive is only separated from the network, if the
feedback contact of option K80 causes an error (see
time value t5).
Functional Example No. AS-FE-I-012-V10-EN 369
Ex. No.
12