System description
Function blocks for TwinSAFE logic components 19
Table 2-6: State information for a connection
Reset state:
The reset state is used to re-initialize the Safety over EtherCAT connection after the
power-on or a Safety over EtherCAT communication error.
Session state:
During the transition to or in the session state a session ID is transferred from the
Safety over EtherCAT master to the Safety over EtherCAT slave, which in turn
responds with its own session ID.
Connection state:
In the connection state a connection ID is transferred from the Safety over EtherCAT
master to the Safety over EtherCAT slave.
Parameter state:
In Parameter state safe communication and device-specific application parameters are
transferred.
Data state:
In Data state Safety over EtherCAT cycles are transferred until either a communication
error occurs or a Safety over EtherCAT node is stopped locally.
Shutdown state:
In the shutdown state the connection was shut down by one of the communication
partners.
(EL6910 or later: connection was shut down because a shutdown command was
received)
Shutdown-Deactive state:
EL6910 or later: connection was shut down via the deactivate inputs of the function
block.
Further information can be found in the Safety-over-EtherCAT ETG.5100 specification.
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