BECKHOFF FC5101 - Manual (Page 62)

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6. Error Handling and Diagnosis
Beckhoff FC510x LED Description
LED Behavior
The red ERROR LED and the green RUN help to quickly diagnose the status of the card:
Error LED
(red) Run LED
(green)
Description
off off TwinCAT has been stopped
off on All configured bus nodes are error free (Box State=0), TwinCAT Task or
Process is running.
off blinking with
2 Hz
The Task, whose process data is linked to the card, is not running.
All configured bus nodes have been found and are error free (Box State=0)
blinking with
2Hz on At least one box state is unequal zero (e.g. node not found, wrong configura-
tion, node in error), TwinCAT Task is running
blinking with
2 Hz off At least one box state is unequal zero (e.g. node not found, wrong configura-
tion, node in error), TwinCAT Task is not running
on off TwinCAT is running, CAN Controller is "Bus OFF". Physical CAN problem.
Possible reasons: e.g. terminating resistor missing, bus too long, wrong baud
rate, node address configured twice, short circuit, wiring error.
Restart is necessary
blinking with
20Hz blinking with
20Hz Configuration Upload is under way
blinking with
20Hz off card is in STOP mode