Siemens SIMATIC ET 200C, Manual

Page: 148 / 333

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