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Section 5 Maintenance PROFINET IO Interface - CI871
3BSE036351-510 A 231
PROFINET IO Interface - CI871
Table 45. PROFINET IO Interface, CI871 - Indications and Fault Finding
Fault Possible Cause and Corrective Action
Neither R(un) nor F(ault) LEDs are
ON
The CI871 unit is in the process of
configuration. If the condition persist, and
no other unit LED on the CEX-Bus is ON:
Check that a valid hardware
configuration including the CI871 is
downloaded to the controller.
Check the CEX-Bus fuse inside the
PM8xx processor unit.
Initiate a reset signal (INIT) from the
PM8xx processor unit.
Replace the CI871 unit.
F(ault) LED is ON The CI871 unit is in the process of being
restarted. Wait until the restart operation is
complete.
Replace unit if the condition persists.
RxTx1/RxTx2 LED is OFF Reception and transmission of I/O data
does not occur at the respective Ethernet
channels.
RxTx1/RxTx2 LED is flashing Reception and transmission of I/O data
occurs normally at the respective Ethernet
channels.
PRIM is OFF The CI871 is not started by the application.
PRIM is ON The CI871 is started by the application.
DUAL is OFF Default, as no redundancy is supported with
PROFINET IO.
CI871 supports hot swap.
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