Safe Stop 2 (Ss2) - Bosch rexroth ctrlX SAFETY SafeMotion Applications Manual

Deselecting the transition function
An active transition function "Safe stop 1 " (SS1) becomes inactive under the
following conditions:
● By activating the STO function after the deceleration process has been com-
● By deselecting the transition function via the active "Safe Motion" profile
● When a safety technology error occurs in the standstill-prioritized variants of
In the case of a drive-controlled operation mode transition, the started deceler-
ation process is continued by the standard firmware, even if the safety function
is deselected.
8.5.2

Safe stop 2 (SS2)

Brief description
If the transition function "Safe stop 2 (SS2)" is activated, the drive is deceler-
ated in a safely monitored way. After the deceleration process has been com-
pleted, the safety function "Safe operating stop (SOS)" is activated.
The
deceleration process, when the motor has stopped; i.e. the actual
velocity
SMO: Velocity threshold for Safe standstill".
The transition to standstill by the function "Safe stop 2 (SS2)" can be per-
formed in two ways:
● "Drive-controlled", i.e. the drive is decelerated by the standard firmware, and
● "NC-controlled", i.e. the higher-level control unit decelerates the drive via the
The deceleration process is always monitored, with regard to the max-
imum transition time, by the deceleration monitoring [safety function
"Safely-monitored deceleration (SMD)"] with integrated monitoring. If the max-
imum transition time is exceeded, the STO function is not necessarily acti-
vated. This is done within the scope of the parameterized error reaction
(P-0-3263.0.1).
Features
The function has the following features:
● Corresponds to stop category 2 according to EN 60204-1.
● The safety function is intended for safety-relevant applications up to
● The energy supply to the motor is not interrupted.
● The transition function can be used in drive systems equipped with the
● The transition can be performed in a "drive-controlled" way or in an "NC-con-
● The safety function "Safe operating stop (SOS)" is automatically activated at
R911404905, Edition 02
pleted
‑ or ‑
using the parameter "P‑0‑3264, SMO: Safety function selection"
‑ or ‑
the transition function "Safe stop 1 (SS1)". In this case, the parameterized
error reaction (P‑0‑3263.0.1) decelerates the drive and activates the STO
function.
transition function
is smaller than
the safety technology monitors the deceleration process or
command value system, and the safety technology monitors the deceleration
process
Category 3, PL d according to EN ISO 13849-1 or SIL 2 according to
EN 62061.
optional safety technology module "Mx".
trolled" way.
the end of the transition function Safe stop 2 (SS2).
ctrlX SAFETY "SafeMotion"
Transition functions
"Safe stop 2 (SS2)"
the value parameterized
103 / 302
detects a successful
in "P-0-3255,
Bosch Rexroth AG