Lenze 8400 - Manual (Page 711)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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14 Drive-based safety
14.3 Integration into the application
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14.3 Integration into the application
When a safety function is requested, the safety technology activates the corresponding safe
monitoring function. The only standstill function executed directly is the "safe torque off" (STO)
function. All other safety functions require a controller action which is safely monitored.
"LS_SMInterface" system block
The
LS_SMInterface system block in the function block editor of the »Engineer« serves to transmit
the control and status information from the safety system to the application. ( 712)
Basic workflow
1. Activation of the safety function (e.g. SS1 - safe stop 1).
• Monitoring starts.
2. Via a control word, the safety system transmits the information to the controller that the safety
function has been activated.
3. The application evaluates the control word and starts the required motion sequence (e.g.
braking).
Internal communication
The drive-based safety system and the standard device communicate via an internal interface.
Related topics:
 Transferring the control information to the application ( 714)

Note!
The execution of the corresponding action (e.g. braking, braking to standstill, holding
the standstill position) requires an appropriate application interconnection which must
be provided by the operator!

Note!
If the communication to the controller is interrupted, e.g. by switching off the controller,
the safety system responds with the following actions:
• Fault stop with STO is activated.
• "Warning" error message is transmitted.
• The "S_Error" LED on the front of the controller is on.
The required error acknowledgement (AIE) is possible via the safety bus and with SO30
via the error acknowledgement input (plug X62).