Siemens SINAMICS S150 - Safe Stop 1 (SS1); Safe Stop 1 with Encoder (Time and Acceleration Controlled)

Safety Integrated Extended Functions
6.4 Safe Stop 1 (SS1)
Safety Integrated
82 Function Manual, 05/2010, A5E03264275A
6.4 Safe Stop 1 (SS1)
6.4.1 Safe Stop 1 with encoder (time and acceleration controlled)
General description
The "Safe Stop 1" (SS1) function with encoder monitors whether motor acceleration reaches
impermissible levels during the SS1 time.
The "Safe Stop 1" (SS1) function allows the drive to be stopped to EN 60204-1, Stop
Category 1. The drive brakes with the OFF3 ramp (p1135) once "Safe Stop 1" is selected
and switches to "Safe Torque Off" (STO) once the delay time has elapsed (p9356/p9556) or
when the shutdown speed is reached (p9360/p9560).
If the drive complies with acceleration monitoring limits, STO is triggered when the shutdown
speed is reached. If acceleration monitoring limits are violated, messages C01706 and
C30706 are output and the drive is stopped with STOP A. If the motor does not reach the
shutdown speed within the set braking time, STO is still triggered and the drive coasts to a
standstill. No message is issued.
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Figure 6-1 Sequence for "Safe Stop 1" with encoder