ctrlX SAFETY "SafeMotion"
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-
pleted
‑ or ‑
●
By deselecting the transition function via the active “Safe Motion“ profile
using the parameter "P‑0‑3264, SMO: Safety function selection"
‑ or ‑
●
When a safety technology error occurs in the standstill-prioritized variants of
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.
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 transition function "Safe stop 2 (SS2)" detects a successful
deceleration process, when the motor has stopped; i.e. the actual
velocity is smaller than the value parameterized in “P-0-3255,
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
the safety technology monitors the deceleration process or
● "NC-controlled", i.e. the higher-level control unit decelerates the drive via the
command value system, and the safety technology monitors the deceleration
process
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
Category 3, PL d according to EN ISO 13849-1 or SIL 2 according to
EN 62061.
● The energy supply to the motor is not interrupted.
● The transition function can be used in drive systems equipped with the
optional safety technology module “Mx”.
● The transition can be performed in a "drive-controlled" way or in an "NC-con-
trolled" way.
● The safety function "Safe operating stop (SOS)" is automatically activated at
the end of the transition function Safe stop 2 (SS2).
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