5 safe stop 1 (ss1), Safe stop 1 (ss1), Is a – Lenze E84Dxxxxx User Manual
Page 30: Depending on the setting of the, Tion, 3safe configuration
3
Safe configuration
3.5
Safety functions
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Lenze · 8400 protec · Drive-based safety · Software Manual · DMS 2.4 EN · 05/2013 · TD05
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3.5.1.5
Safe stop 1 (SS1)
Safe stop 1 / SS1 (corresponds to a "Stop1" according to EN 60204)
Description
The drive-based safety system monitors whether the drive has reached the set tolerance margin
(n=0) within the parameterised stopping time and, after the stopping time has elapsed,
switches the drive to torque-free operation via the safety function
• The drive must be braked to standstill through the application!
• The speed is calculated from the standard device.
• Without an encoder, the function evaluates the speed status n=0 of the controller. In this
case the stopping time monitored by the drive-based safety system 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.
Priority
Priority function:
Function
Parameter
SS1, SS2: Stop time
SOS: 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.
• "OFF state" at a safe input which has been assigned to the function by parameter setting.
• As response to the error stop request.
• As response to the emergency stop request.
Normal
behaviour
When the stopping time has elapsed, a standard stop is started.
• The power supply for the motor is safely interrupted immediately (
). The motor cannot
generate a torque and thus no dangerous movements of the drive.
Error behaviour
If standstill could not be reached when the stopping time has elapsed, an error message is
generated and an error stop is started.
• The power supply for the motor is safely interrupted immediately (
). The motor cannot
generate a torque and thus no dangerous movements of the drive.
n
t
0
SS1
STO
STO