Siemens Metro 21 M216KA Operator's Manual page 89

LEDs on the
ET 200L-SC or
ET 200L-SC IM-SC
Table 5-2 Diagnostics Using the LEDs of the ET 200L-SC or ET 200L-SC IM-SC
SF BF LED
LED (Bus Fault)
(Group
Error)
Off Off
Off Off
On
No On
mean-
ing
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.
ON LED Meaning
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.
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
Incorrect assignment of pa-
rameters
SC communication error
(see byte 15.1, Table 5-6)
On Transmission rate is being
adjusted (max. 4s).
g
Diagnostics
Error Handling
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.
–
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.
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
Check the PROFIBUS con-
nection.
Check the DP master.
5-3