Lenze E94AYAE SM301 - Manual (Page 47)

Lenze · SM301 safety module · Parameter setting & configuration · DMS 2.3 EN · 11/2013 · TD05
47
3 Safe configuration
3.9 Safety functions
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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.
 In the SOS state, relative position changes are added and compared with the permissible value
in the parameter "Tolerance margin delta p=0".
• When the SOS state is left, the maximum relative position change is displayed in the
parameter C15312 .
• When the SOS state is requested again, the sum of the last position changes is reset to zero.
Example:
The "SS2 active" state and the "SOS active" state are interrupted by an STO request. If the STO
request is reset, the status immediately changes to SOS. This leads to a reset of the current
position deviation to p=0.
Normal
behaviour
When the stopping time has elapsed or after falling below the tolerance margin (n=0), the
monitoring of the safe operating stop (SOS) becomes active.
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.
Safe operating stop (SOS) in final state:
If the speed gets out off the set tolerance margin (n=0 or delta p=0) during a safe operational
stop, an error message is generated and an error stop starts.
• 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.
Safe Stop 2 / SS2 (corresponds to a "Stop 2" in accordance with EN 60204)
n
t
0
SS2
SOS Œ

STO