Operation
User manual 55530_hdb_en_16 132 / 156
LED indication
ST
Tab. 9-4: LED indication ST
BUS RUN indicates the state of the bus system.
LED indication
BUS RUN
Tab. 9-5: BUS RUN LED indication
LED indication
flashing green
This is what you can do:
Check the line connections.
Check the PLC configuration.
Indica-
tion
State Description
Green
Continuously lit Error-free operation
Red
Continuously lit An error is active on the module
Indica-
tion
State Description
Green
Lights continu-
ously
Module is exchanging data with the
PLC
Green
Flashing at 1
Hz
Module has a PROFINET name.
No connection to PLC
Yellow
Flashing at 5
Hz
The module has no PROFINET name
Off
Module is off
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