ctrlX SAFETY "SafeMotion"
Safety functions in normal operation
It can be checked in the control if the actual velocity is within the defined
velocity window (P‑0‑3237, bit 5).
● To prevent bit flickering at an axis velocity close to or equal to the moni-
toring thresholds, an adjustable hysteresis (P‑0‑3255) is taken into consider-
ation before P‑0‑3237, bit 5 is set during the transition of the velocity from
outside the velocity window to inside the velocity window.
Fig. 20: Safety function “Safe speed monitor”
P‑0‑3237, bit 5 Status bit Safe speed monitor active/inactive
P‑0‑3255 Velocity threshold for safe standstill
P‑0‑3270.0.7 lower velocity window threshold
P‑0‑3270.0.8 upper velocity window threshold
8.2
Safety functions in normal operation
8.2.1
Safe direction (SDI)
The safety function “Safe direction“ ensures that motion is only possible in one
direction.
Features
The safety function “Safe direction“ 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
Category 3, PL d according to EN ISO 13849-1 or up to SIL 2 according
to EN 62061.
●
Notes on parameterization:
The safe direction (released direction of motion) has to be individually para-
meterized for normal operation and special mode. A tolerated motion in a
non-released direction of motion can be specified by the standstill window
(P‑0‑3270.0.3).
The safety function Safe direction is active in normal operation, if it has
been parameterized for this mode (P‑0‑3277.0.1).
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