5-3
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
The ET 200L-SC or ET 200L-SC IM-SC distributed I/O device has three
LEDs for indicating its status.
Table 5-2
Diagnostics Using the LEDs of the ET 200L-SC or ET 200L-SC IM-SC
SF
LED
(Group
Error)
BF LED
(Bus Fault)
ON LED
Meaning
Error Handling
Off
Off
Off
No voltage is being applied
to the ET 200L-
SC/ET 200L-SC IM-SC
An ET 200L-
SC/ET 200L-SC IM-SC
hardware fault has oc-
curred.
Check the power supply.
Switch on the on-off switch
for 24 V DC on the power
supply module.
Check whether the elec-
tronics block is properly
secured on the terminal
block.
Off
Off
On
Power supply of the
ET200L-SC/ ET 200L-SC
IM-SC is on (comes on
briefly when the power is
switched on)
Data exchange
–
On
Incorrect assignment of pa-
rameters
Check whether parameter
assignment for the Smart
Connect configuration
matches the actual Smart
Connect configuration.
Check that the cable to the
Smart Connect is properly
connected.
Check the power supply of
the TB16 SC.
SC communication error
(see byte 15.1, Table 5-6)
Connection to SC module
with serial data transfer
aborted (analog module,
counter)
24 V power supply of the
SC modules is switched off
(analog module, counter)
Module defective
No
mean-
ing
On
On
Transmission rate is being
adjusted (max. 4s).
Check the PROFIBUS con-
nection.
Check the DP master.
LEDs on the
ET 200L-SC or
ET 200L-SC IM-SC
Diagnostics
g