Safety components
© Siemens AG 2003 All Rights Reserved
SIMOTION Safety Unit (AP) - Edition 06.2003
3-23
Comment
If the EMERGENCY OFF or the "Safety guard with restart inhibit" is selected, a
flashing fault lamp or, optionally, a separate alarm lamp (parameterizable)
indicates that the system is ready for acknowledgement.
Figure 3-3 Safety gate safety functions
Note on safety gate with manual acknowledgement
Both contacts must be activated to open the safety gate. If only one contact is
activated and reclosed, an alarm is output with a continuous light. In this case,
both contacts will then have to be opened and reclosed.
The continuous light goes out after both contacts have been properly opened.
When the contacts are closed, a flashing signal indicates that the safety gate is
ready for acknowledgement. After the acknowledge button has been activated,
the machine is again ready to be started.
For safety gates without acknowledgement, there is no display if only one contact
is opened and reclosed due to an operation error. The problem is eliminated by
completely opening and reclosing the gate.
Figure 3-4 Engaging lock safety functions