8.1.9 Error scenarios
The most common errors, faults and possibilies to correct errors can be found in the chapter
4Diagnoscs and fault eliminaon ^ 93
In the following secons, the causes and remedies for the most frequent applicaon errors in
EtherCAT applicaons are described. The state diagram and descripons on the next pages
serve to localize and remove an error.
PLC:
EtherCAT:
Stop
Init
NO
NO
Switch on L-force Controller and field devices
The System is running
EtherCAT configuration ok?
YES
Application error-free?
NO
Eliminate error
1
1
YES
YES
PLC:
EtherCAT:
1
Stop
Unknown
PLC:
EtherCAT:
Running
Unknown
PLC:
EtherCAT:
Stop
Pre-Operational
PLC:
EtherCAT:
Running
Safe-Operational
PLC:
EtherCAT:
Running
Pre-Operational
PLC:
EtherCAT:
Running
Operational
Reset
(origin)
Reset
(origin)
Start program
(Online -> Start)
Load application
(Online -> Load)
Executable EtherCAT
project available?
Stop PLC
Reset (warm)
Reset (cold)
8.1.9.1 "Pre-Operaonal" EtherCAT state is not achieved
During the start-up of the EtherCAT bus, a check is carried out at the transion from Init to
Pre-Operaonal to determine whether the physical bus conguraon corresponds to the
congured bus conguraon. If theses conguraons are dierent, the master does not enter
the Pre-Operaonal state. Furthermore, the slaves are inialized during the transion from
Init to Pre-Operaonal. If this fails because, for instance, a slave rejects the conguraon, the
master does not enter the Pre-Operaonal state.
Conguring the network
EtherCAT
Error scenarios
54