ctrlX SAFETY "SafeMotion"
Safety functions in special mode “Safe motion SMMx”
8.4.2 Safely-monitored transient oscillation (SLS-LT)
To take transient oscillation processes into account, the safety function
“Safely monitored transient oscillation (SLS-LT)“, a variant of the safety func-
tion “Safely limited speed (SLS)“ is available.
The dual-channel monitoring prevents the drive from exceeding the preset
velocity limit value [P‑0‑3290.x.8 (x=1..16)] for more than a preset time
[P‑0‑3290.x.7 (x=1..16)] for the “Safely-monitored transient oscillation (SLS-LT)
“ safety function.
WARNING
Dangerous movements! Danger to life, risk of injury,
serious injury or property damage, because the moni-
toring function is switched off with a delay!
When using the safety function “Safely-monitored tran-
sient oscillation”, it must be taken into account that
exceeding the parameterized “Safely-limited speed”
(P‑0‑3290.x.8) might be recognized as a regular transient
oscillation in the case of error. In this case, the error
reaction is only triggered when the Safely-reduced speed
(P‑0‑3290.x.2) has been exceeded. This must be taken
into account in the risk analysis of the machine.
Features
The “Safely-monitored transient oscillation“ 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 safety function is active if it is parameterized for the special operation
upon selection "Safe motion SMMx" (P‑0‑3290.x.1 with "x"=1-16 for SMM1-
SMM16).
During commissioning, parameterize the following:
– the velocity threshold(s) [P‑0‑3290.x.2],
– the safely reduced speed [P‑0‑3290.x.8] and
–
the tolerance time(s) for oscillation of the safely reduced speed
[P‑0‑3290.x.7]
The safely reduced speed (P‑0‑3290.x.8) has to be smaller than the parame-
terized speed threshold in the selected special operation (P‑0‑3290.x.2).
The parameterizations are password-protected after activation of the safety
technology (P‑0‑3230.0.1) and cannot be changed by unauthorized persons.
(P‑0‑3230 contains the status of the safety technology password).
●
Selection:
The safety functions are selected via the active “SafeMotion” profile
(P‑0‑3264).
For example, the 16 different Safe motions (SMM) with the corresponding
directions can be selected via the SMMx signals 1 to 16 (A_SMMx, x=1..16)
in the SafeMotion profile Bosch Rexroth.
● Status display:
The status parameter (P‑0‑3264.0.1, bit 6) indicates if the safety function is
activated.
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