ctrlX SAFETY "SafeMotion"
Safety functions in special mode "Safe standstill"
Fig. 24: Safety function “Safe operating stop“ with monitoring of the command
values
● Safety function selection:
Direct selection: The safety function can be directly selected via the active
"SafeMotion” profile (P‑0‑3264).
NOTE: Before the safety function is directly selected, the drive system has to
be decelerated via the command value input; drive-controlled deceleration is
not carried out!
Indirect selection: The safety function is automatically activated at the end
of the transition function “Safe stop 2 (SS2)“.
●
Terminating the safety function:
The function “Safe operating stop is deselected by selecting the safety func-
tion “Safe torque off (STO)“ or by deselecting the safety function.
After terminating the safe operating stop, e.g. by deselecting the safety func-
tion and executing the start command, the working motion of the drive can
be immediately continued at the point of interruption.
●
The status parameter (P‑0‑3264.0.1, bit 3) indicates if the safety function is
activated.
Notes on project planning for “SOS”
When using the safety function "Safe operating stop", it is absolutely necessary
to comply with the following safety instructions:
DANGER
Lethal injury and/or property damage caused by unin-
tended axis motion!
⇒ When the drive, with the safety function
"Safe operating stop" activated, is in the uncontrolled
state and external force influences are to be expected,
any possible motion must be safely prevented by addi-
tional measures, e.g., by using a mechanical brake.
DANGER
Lethal injury and/or property damage caused by unin-
tended axis motion!
⇒ If external force influences are to be expected with
the safety function "Safe operating stop", e.g. in case of
a vertical axis, this motion must be safely prevented by
additional measures, e.g. a mechanical brake or counter-
weight. For such axes, Bosch Rexroth recommends using
the Safe braking and holding system.
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