Safe Stop 1 (Ss1, Time Controlled); Ss1 (Time Controlled) With Off3 - Siemens SINAMICS S120 Function Manual

Safety Integrated basic functions

9.5 Safe Stop 1 (SS1, time controlled)

9.5 Safe Stop 1 (SS1, time controlled)
9.5.1

SS1 (time controlled) with OFF3

General description
The "Safe Stop 1" (SS1) function allows the drive to be stopped in accordance with
EN 60204-1, Stop Category 1. The drive decelerates with the OFF3 ramp (p1135) once
"Safe Stop 1" is selected and switches to "Safe Torque Off" once the delay time set in
p9652/p9852 has elapsed.
Note
Selection via terminals
If the "Safe Stop 1" function (time-controlled) function has been selected by parameterizing a
delay in p9652/p9852, STO can no longer be selected directly via terminals.
Functional features of Safe Stop 1
SS1 is enabled when p9652 and p9852 (delay time) are not equal to "0".
● Setting parameter p9652/p9852 has the following effect:
● When SS1 is selected, the drive is braked along the OFF3 ramp (p1135) and STO/SBC is
Note
Setting the delay time
So that the drive is able to travel down the OFF3 ramp completely and any motor holding
brake present can be applied, the delay time should be set as follows:
• Motor holding brake parameterized: Delay time ≥ p1135 + p1228 + p1217
• Motor holding brake not parameterized: Delay time ≥ p1135 + p1228
● The selection is realized through two channels - however braking along the OFF3 ramp,
578
– p9652 = p9852 = 0
SS1 is not enabled. Only STO can be selected via the onboard terminals and
PROFIsafe.
– p9652 = p9852 > 0
SS1 is enabled. Only SS1 can be selected via the onboard terminals; with PROFIsafe,
a selection of SS1 and STO is possible.
automatically initiated after the delay time has expired (p9652/p9852).
After the function has been selected, the delay timer runs down - even if the function is
deselected during this time. In this case, after the delay time has expired, the STO/SBC
function is selected and then again deselected immediately.
only through one channel.
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Drive functions