Siemens SIMATIC ET 200C Manual page 168

Fault Diagnostics with the IM 308-C
Using LEDs to Diagnose Problems, Continued
Table 8-3 Fault Messages through LEDs of the ET 200C; DI 16/DO 16
LED
RUN
U
L1
U
L2
BF
DIA
0, 1, 2, 3, 4, 5, 6, 7, 8,
9,10,11,12,13,14,15
(Status LEDs of the
inputs/outputs)
1
The sensor supply for all of the inputs in the group of 4 is interrupted in the event of a short-circuit in the sensor supply.
2
The diagnostics message remains for a further 20 s (approx.) after the short-circuit has been eliminated (e.g. when an
output is reset).
8-4
Optical signal
Lit (green) ET 200C; DI 16/DO 16
RUN mode (power supply switched on)
Lit (green) Load voltage for channel group Q0 present
Lit (green) Load voltage for channel group Q1 present
Lit (red) Either
The monitoring time has elapsed without the ET
200C; DI 16/DO 16
addressed (because the connection to the IM
308-B is lost or IM 308-B is in STOP mode)
or
ET 200C; DI 16/DO 16
parameterized during startup or a restart
Lit (red) Group diagnostics for groups of 4 inputs or 4 out-
puts:
Inputs: wire break, short-circuit
sensor supply
Outputs: wire break, short-circuit
undervoltage at the outputs
Lit (green) Input or output active
DC 24V/2A
Explanation
DC 24V/2A is in the
DC 24V/2A being
DC 24V/2A was not
1
/overload of the
2
/overload or
ET 200C Distributed I/O Station
EWA 4NEB 812 6119-02b