Lenze E94AYAE SM301 - Manual (Page 52)

3 Safe configuration
3.9 Safety functions
52
Lenze · SM301 safety module · Parameter setting & configuration · DMS 2.3 EN · 11/2013 · TD05
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
3.9.2.2 Safely limited speed (SLS)
Safely-Limited Speed / SLS
Description
When the value has fallen below the parameterised speed limit Nlim or, at the latest, after the
adjustable braking time has elapsed, the safety module monitors that the set limited speed
Nlim is not exceeded.
 • The drive must be braked to the limited speed through the application!
• For operation within the limit values the "SLS1...4 monitored" status is set ( C15000 ).
• The status can be assigned to the safe output as a safe speed monitor.  Safe output
( 37)
• The status can also be reported via the safety bus.
• The function must not be parameterised if "No encoder system" is set. The plausibility check
rejects such implausible settings until they have been parameterised correctly.
• The limited speeds SLS2 ... SLS4 are available from SM301 V1.1!
• From SM301 V1.3 you can set both the limited speed and, in addition, the permissible
direction of movement via a parameter.
• When the direction monitoring SDIxxx is combined with the SLSx function, the delay times
must be adapted to each other. The braking time Nlim then starts at the same time as the
SDI delay time.
Function
Function  (monitoring is active before the braking time has elapsed) only from SM301 V1.3
Parameter  C15330/1...4 SLS1...4: Limited speed Nlim
 C15331/1...4 SLS1...4: Braking time Nlim
 C15332/1...4 SLS1...4: Reaction (n>Nlim)
• Selection of the function to be executed ( STO , SS1 or SS2 ) if monitoring
responds.
C15333/1...4 SLS1...4: Perm. direction of movement
C15350 SLS, SMS: Max. response time
• If in the event of an error the speed is still outside the limit values after
the response time has elapsed, STO is tripped immediately.
• Detailed information can be found in the chapter " Error analysis for the
functions SMS and SLS ". ( 53)
Activation How to activate the function:
• A data telegram with a corresponding content is sent to the controller via the safety bus.
 Safety bus ( 59)
• "OFF state" at a safe input which has been assigned to the function by parameter setting.
 Safe inputs ( 34)
Error behaviour If the speed exceeds the set limited speed Nlim in the monitored state, an error message is
generated and an error stop is triggered with the function set in the parameter
"SLS1...4: Reaction (n>Nlim)" ( STO , SS1 or SS2 ).

Œ
Ž
t
0
SLS
n
Nlim
STO/SS1/SS2
-Nlim
Œ
t
0
SLS
n
Nlim
SLS observed
-Nlim
0 1