5-2
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
5.1
Diagnostics Using the LEDs
The ET 200L distributed I/O device features the following diagnostic op-
tions:
LEDs
Slave diagnostics (refer to Section 5.2)
Each input and output of the ET 200L distributed I/O device has a status dis-
play. The status display LED lights up when the input or output is active.
The ET 200L distributed I/O device has two LEDs for displaying statuses.
Table 5-1
Diagnostics Using the LED Display
BF LED
(Bus Fault)
ON LED
Meaning
Error Handling
Off
Off
No voltage is being applied to
the ET 200L.
An ET 200L hardware fault has
occurred.
Check the power supply.
Switch on the on-off switch for
24 VDC on the power supply
module.
Check whether the electronics
block is properly secured on the
terminal block.
On
On
ET 200L is in the process of
starting up.
–
The connection to the DP mas-
ter has failed.
ET 200L has still not received
any configuration data.
Check the PROFIBUS connec-
tion.
Check the DP master.
Check the configuration in the
DP master (station type, input/
output, PROFIBUS address).
Check which PROFIBUS ad-
dress has been set.
Off
On
Data exchange
–
Introduction
Status Display
ET 200L LED
Display
Diagnostics
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