ctrlX SAFETY "SafeMotion"
8 Safety functions
8.1 Global safety functions
8.1.1
Safe maximum speed (SMS)
With the safety function “Safe maximum speed“, dual-channel monitoring pre-
vents the drive from exceeding the preset velocity limit value (P‑0‑3270.0.2).
It is possible to check in the control whether the velocity command values are
within the allowed limits (P‑0‑3238).
Features
The safety function “Safe maximum speed“ has the following features:
●
Required optional safety technology module: The safety function can be
used in drive systems equipped with the optional safety technology module
“Mx”.
●
Maximum safety level:
The safety function is intended for safety-relevant applications up to Cate-
gory 3, PL d according to EN ISO 13849‑1 or SIL 2 EN 62061.
●
Selecting the function: The safety function is always active in normal and
special operation if the function was configured during commissioning of
the safety technology in the global safety functions (P‑0‑3270.0.1).
●
Monitoring function: The dual-channel monitoring prevents the drive from
exceeding the preset velocity threshold - the safe maximum speed
(P‑0‑3270.0.2).
When a monitoring function is triggered, this causes an error reaction which
decelerates the drive system. The corresponding error message is F7020 .
●
Status displays:
The status parameter (P‑0‑3264.0.1, bit 23) indicates if the safety function is
activated.
The currently active velocity monitoring limit of SafeMotion is displayed in
the active velocity threshold (P‑0‑3238). With P‑0‑3238, it is possible to
check in the control unit whether the velocity command values are within
the allowed limits.
With the auxiliary function “limitation of the positioning velocity“, it is possible
to monitor and, if necessary, limit the velocity command value effective in the
drive to the active velocity threshold (P‑0‑3238).
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