Safe Stop 1 (Ss1, Time Controlled); Ss1 (Time--Controlled) With Off3 - Siemens Sinumerik 840D sl Function Manual

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4.4

Safe Stop 1 (SS1, time controlled)

4.4.1 SS1 (time- - controlled) with OFF3
General description
The "Safe Stop 1" (SS1) function allows the drive to be stopped according to
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" (STO) once the
delay time set in p9652 has elapsed.
Note
Once the SS1 (time--controlled) function has been selected by parameterizing a
delay in p9652, STO can no longer be selected directly via the terminals.
Functional features of Safe Stop 1
SS1 is enabled when p9652 (delay time) are not equal to "0".
S The function can be selected only in conjunction with Safe Torque Off.
S When SS1 is selected, the drive is braked along the OFF3 ramp (p1135) and
STO/SBC are automatically initiated after the delay time (p9652) has expired.
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 immedia-
tely.
Note
So that the drive is able to travel down the OFF3 ramp completely and any motor
holding brake present can be applied before the pulse is switched off, the delay
time can be set as follows:
S Motor holding brake parameterized:
Delay time p9652 ² p1135 + p1228 + p1217
S Motor holding brake not parameterized:
Delay time p9652 ² p1135 + p1228
S The selection is realized through two channels -- however braking along the
OFF3 ramp, only through one channel.
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Safety Functions integrated in the drive
4.4 Safe Stop 1 (SS1, time controlled)
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