4-26
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
4.3.1 Using LEDs to Diagnose Problems
Figure 4-8 Fault LEDs on the ET 200U Interface Module
Table 4-7
LED Fault Messages on ET 200U Interface Module
LED
Optical
Signal
Explanation
RUN
Lit
Normal operation (load voltage supply
available)
BUS–FAULT
Lit
Response time has run out and the
IM 318–B interface module was not ad-
dressed.
During system start–up or power up:
IM 318–B not parameterized yet.
No connection between SINEC L2–DP
bus and slave station.
IM–FAULT
Lit or
flashing
There is a fault in the I/O bus (e.g. a bus
unit is defective).
BUS–FAULT
and
IM–FAULT
Lit
There is a hardware fault in the ET 200U
interface module.
BUS–FAULT
and
IM–FAULT
Flashing
The configured station address is not within
the permitted range (3 to 124).
ET 200U(DP Siemens): Address Assignment,Starting–Up,Diagnosing Faults Using COM ET200
