Ss1 With External Stop - Siemens SINAMICS S120 Function Manual

4.1.2.2

SS1 with external stop

In drive line-ups (e.g. drives that are mechanically connected via the material), the drive-
independent braking on the respective OFF3 ramp can cause problems. If the SS1E function
is used, the safe delay time (p9652) is started when the function is selected, but no OFF3 is
triggered. The higher-level controller still enters the setpoint. The controller receives the
information that SS1E has been selected via the Safety Info Channel.
Any axis motion is possible
During the delay time (p9652), for "Safe Stop 1 (time-controlled) with external stop", any
axis movements are possible.
Differences between "SS1 with OFF3" and "SS1 with external stop"
"SS1 with OFF3" and "SS1 with external stop" have the following differences:
● In order to activate "Safe Stop 1 with external stop", additionally set p9653 = 1.
● When SS1E is selected, the drive is not braked along the OFF3 ramp, but after the delay
time has expired (p9652), only STO/SBC is automatically initiated.
See also
Safe Brake Control (SBC) (Page 78)
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
WARNING
Description of Safety Integrated functions
4.1 Safety Integrated basic functions
77