
Control technology | EtherCAT communication manual
Diagnostics
Error scenarios
146 L DMS 3.1 EN 01/2011 TD17
Expected state changes Current states Error
PLC EtherCAT bus
•PLC:
Origin
RUN
•Bus:
Unknown
Init
Pre-Operational
Origin Unknown EtherCAT bus does not enter the
Pre-Operational state
( 147)
•PLC:
Origin
RUN
•Bus:
Pre-Operational
Safe-Operational
Operational
Origin Pre-
Operational
• Compilation error in »PLC Designer«
( 147)
• Control unit/PLC does not enter the RUN state
( 147)
•PLC:
Origin
RUN
•Bus:
Pre-Operational
Safe-Operational
Operational
RUN Pre-
Operational
EtherCAT bus does not enter the Operational state
( 148)
•PLC:
Origin
RUN
•Bus:
Safe-Operational
Operational
RUN Operational Shafts make clicking noises
( 149)
Shafts do not rotate
( 150)
Messages in the logbook of the IPC:
• Error during EtherCAT data transmission
( 148)
• Logbook message: "Cannot spawn Remote API
Server" ( 151)
• Logbook message: "Ethernet cable not connected"
( 152)
• Logbook message: "Ethernet cable connected"
( 153)
• Logbook messages: "Slave at index X missing" with
"Cyclic command WKC error ..." ( 154)
• Logbook message: "Cyclic command WKC error ..."
( 156)
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