Siemens SINAMICS S110 - Safe Stop 1 (SS1); Safe Stop 1 (SS1, Time and Acceleration Controlled)

Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
365
8.5.3 Safe Stop 1 (SS1)
8.5.3.1 Safe Stop 1 (SS1, time and acceleration controlled)
The SS1 function with an encoder monitors whether motor acceleration reaches
impermissible levels during the SS1 time.
The "Safe Stop 1" function can be used to stop the drive in accordance with 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 or after the SS1 time has expired. If acceleration monitoring limits are
violated, messages C01706 and C30706 are output and the drive is stopped with STOP A.
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Figure 8-3 Sequence with SS1 selection
Functional features of "Safe Stop 1"
● The delay time starts after the function has been selected. If SS1 is deselected again
during this time, the STO function is selected and deselected again straightaway after the
delay time has elapsed or the speed has dropped below the shutdown speed.
● The selection is realized through two channels - however braking along the OFF3 ramp,
only through one channel.
● The "Safe Acceleration Monitor" (SAM) function is selected during braking (see "Safe
Acceleration Monitor").