ctrlX SAFETY "SafeMotion"
Fig. 19: |V_act|<P‑0‑3270.0.2
8.1.2
Safe speed monitor (SSM)
The safety function “Safe speed monitor“ monitors via two channels whether or
not the axis is within a defined velocity range. The result of this monitoring can
be provided to a higher-level control via the status words.
Features
The safety function “Safe speed monitor“ 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: Safe Motion safely monitors if the axis is within a
defined velocity window (lower threshold: P‑0‑3270.0.7, upper threshold:
P‑0‑3270.0.8).
Both velocity thresholds are bipolar, i.e. the parameterized threshold values
are active in both directions (positive and negative velocity).
●
Status displays:
The status parameters (P‑0‑3264.0.1, bit 5) indicates if the safety function is
activated.
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