Diagnostics, Error And System Alarms; Status And Error Displays - Siemens SIMATIC ET 200SP Manual

Diagnostics, error and system alarms

5.1

Status and error displays

Introduction
Diagnostics by means of LEDs is an initial tool for error localization. In order to localize
errors still further, you usually evaluate the display of the module status in STEP 7 or the
diagnostics buffer of the CPU. The buffer contains plain text information on the error that has
occurred. For example, you will find the number of the relevant error OB in the plain text
information.
LED display
The figure below shows the LED display on the CM DP communication module.
①
Figure 5-1
16
DIAG (green/red)
LED display on the CM DP communication module
Communication module CM DP (6ES7545-5DA00-0AB0)
Manual, 12/2014, A5E33619758-AB
5