Using Leds To Diagnose Problems - Siemens SIMATIC S5 ET 200U Manual

ET 200U(DP Siemens): AddressAssignment,Starting–Up,Diagnosing Faults Using COMET200

4.3.1 Using LEDs to Diagnose Problems

Figure 4-8 Fault LEDs on the ET 200U Interface Module
Table 4-7
4-26
LED Fault Messages on ET 200U Interface Module
LED Optical
Signal
RUN Lit
BUS–FAULT Lit
IM–FAULT Lit or
flashing
BUS–FAULT
and Lit
IM–FAULT
BUS–FAULT
and Flashing
IM–FAULT
Explanation
Normal operation (load voltage supply
available)
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.
There is a fault in the I/O bus (e.g. a bus
unit is defective).
There is a hardware fault in the ET 200U
interface module.
The configured station address is not within
the permitted range (3 to 124).
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b