ctrlX SAFETY "SafeMotion"
● By activating the SOS function after the deceleration process has been com-
pleted
‑ or ‑
●
By deselecting the transition function via the active “SafeMotion“ profile
using the parameter "P‑0‑3264, SMO: Safety function selection"
‑ or ‑
●
When a safety technology error occurs
‑ or ‑
●
By selecting the safety function "STO" or "SS1"
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.
8.5.3
Safely-monitored deceleration (SMD)
Brief description
The transition function "Safely-monitored deceleration" (SMD) uses dual-
channel monitoring to detect whether the actual velocity of the drive, given
a change in the operating status or given an error reaction, is within a parame-
terized velocity envelope curve.
Four monitoring variants of the transition function
"Safely-monitored deceleration (SMD)" are available.
Features
The function has the following features:
● 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 transition function can be used in drive systems equipped with the
optional safety technology module "M5".
●
Transitions due to a change in the operating status or due to an error reac-
tion are monitored.
●
Transition variants:
– "Safely-monitored deceleration with ramp-based trend monitoring"
(SMD
RampTrend
)
– "Safely-monitored deceleration with trend monitoring, time-based"
(SMD
TimeTrend
)
– "Safely-monitored deceleration based on actual velocity" (SMD
ActVel
) .
–
"Transition function Safely-monitored deceleration in the case of error
(based on actual velocity)” (SMD-E)
Furthermore, the transition can be performed in two ways:
–
"Drive-controlled", i.e. the transition of the drive is carried out by the
standard firmware, and the safety technology monitors the transition
process or
–
"NC-controlled", i.e. the higher-level control unit carries out the transition
of the drive by adjusting the command value system, and the safety tech-
nology monitors the transition process
● The duration of the transition is monitored (cf. P‑0‑3263.0.6 ,
P‑0‑3263.0.7, P‑0‑3280.0.2, P‑0‑3280.0.3, P‑0‑3280.0.4). When the
monitoring function is triggered, this causes an error reaction
which decelerates the drive system. The corresponding error mes-
sage is "F7050 Maximum transition time exceeded or "F8350
Maximum transition time exceeded“.
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