Operation
User manual 55170_hdb_en_13 121 / 145
CfgF indicates the state of the PLC configuration.
LED indication
CfgF
Tab. 9-6: LED indication CfgF
LED display, red This is what you can do:
Check the PLC configuration.
LNK/ACT (Link/Activity) indicate the state of the Ethernet communication at
each port.
LED indication for
LNK/ACT
Tab. 9-7: LED indication for LNK/ACT
LED display Off This is what to do:
Check the line connections.
Indica-
tors
State Description
Green
Lit continuously Module in valid IO data exchange with
valid configuration
Red
Lit continuously Parameterization error. Module not in
valid IO data exchange with valid con-
figuration
Off
Module has not received any parame-
ters yet
Indica-
tion
State Description
Green
Lights continu-
ously
Module has detected a link at the as-
sociated port
Green
Yellow
Green:
continuously lit
Yellow:
flashing
Link available
Link and activity available
Off
Corresponding port is closed, no cable
connection available
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