Beckhoff EP3744-0041 Documentation page 40

Commissioning/Configuration
State Machine
Init This button attempts to set the EtherCAT device to the Init state.
Pre-Op This button attempts to set the EtherCAT device to the pre-operational state.
Op This button attempts to set the EtherCAT device to the operational state.
Bootstrap This button attempts to set the EtherCAT device to the Bootstrap state.
Safe-Op This button attempts to set the EtherCAT device to the safe-operational state.
Clear Error This button attempts to delete the fault display. If an EtherCAT slave fails during
change of state it sets an error flag.
Example: An EtherCAT slave is in PREOP state (pre-operational). The master now
requests the SAFEOP state (safe-operational). If the slave fails during change of
state it sets the error flag. The current state is now displayed as ERR PREOP. When
the Clear Error button is pressed the error flag is cleared, and the current state is
displayed as PREOP again.
Current State Indicates the current state of the EtherCAT device.
Requested State Indicates the state requested for the EtherCAT device.
DLL Status
Indicates the DLL status (data link layer status) of the individual ports of the EtherCAT slave. The DLL status
can have four different states:
Status Description
No Carrier / Open No carrier signal is available at the port, but the port is open.
No Carrier / Closed No carrier signal is available at the port, and the port is closed.
Carrier / Open A carrier signal is available at the port, and the port is open.
Carrier / Closed A carrier signal is available at the port, but the port is closed.
File Access over EtherCAT
Download With this button a file can be written to the EtherCAT device.
Upload With this button a file can be read from the EtherCAT device.
40 Version: 2.2 EP3744-0041 and EP3744-1041