Lenze E94AYAE SM301 - Manual (Page 45)

Lenze · SM301 safety module · Parameter setting & configuration · DMS 2.3 EN · 11/2013 · TD05
45
3 Safe configuration
3.9 Safety functions
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3.9.1.5 Safe stop 1 (SS1)
Safe Stop 1 / SS1 (corresponds to a "Stop1" according to EN 60204)
Description
The safety module monitors whether the drive has reached the set tolerance margin (n=0)
within the parameterised stopping time and, depending on the parameterised SS1 mode, after
the stopping time has elapsed or after falling below the tolerance margin (n=0), switches the
drive to torque-free operation via the STO safety function.
 • From SM301 V1.4 additionally the deceleration ramp for the SS1 stop function can be
parameterised and monitored.  Ramp monitoring (SS1/SS2) ( 48)
• The drive must be braked to standstill through the application!
• The speed is calculated from the encoder data.  Safe speed measurement and position
detection ( 31)
• In SS1 mode "STO with n=0", you can use the parameter "STO delay after n=0" to set a waiting
time which determines when the STO status is adopted.
• Without an encoder, the function evaluates the speed status n=0 of the controller. In this
case the stopping time monitored by the safety module must be 0.5 s longer than the
stopping time parameterised on the controller.
• Additional measures are required against movements caused by external forces, e.g.
mechanical brakes. The application time of a brake must be considered when determining
the stopping time.
• A restart is only possible after the stopping time has elapsed completely. This does not apply
to special operation.  Restart behaviour ( 43)
Priority Priority function: STO
Subordinated function: SS2
Function
From SM301 V1.3, function  (STO with n=0) can be selected as SS1 mode.
Parameter C15306 SS1 mode:
 STO after stopping time
 STO with n=0
 C15305 SS1, SS2: Stopping time
 C15307 SS1: STO delay after n=0
 C15310 Speed window (n=0)
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)
• As response to the error stop request.
• As response to the emergency stop request.
Normal
behaviour
When the stopping time has elapsed or after falling below the tolerance margin (n=0), a
standard stop is activated.
• The power supply for the motor is safely interrupted immediately ( STO ). The motor cannot
generate a torque and thus no dangerous movements of the drive.
Error behaviour If standstill has not been reached when the stopping time has elapsed, or if the deceleration
ramp parameterised was exceeded during the Ramp monitoring was activated, an error
message is triggered and an error stop is activated.
• The power supply for the motor is safely interrupted immediately ( STO ). The motor cannot
generate a torque and thus no dangerous movements of the drive.
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