Siemens simatic ET 200MP Manual - Page 17

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Siemens simatic ET 200MP Manual

Interrupts and diagnostic, error, and system alarms

4.1

Status and error displays

Introduction
Diagnostics by means of LED display is an initial tool for error localization. To further limit the
error, you usually evaluate the display of the CPU, 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 appropriate error
OB there.
LED display
The figure below shows the LED display on the IM 155-5 PN BA interface module.
①
②
③
④
⑤
Figure 4-1
Interface module IM 155-5 PN BA (6ES7155-5AA00-0AA0)
Manual, 02/2017, A5E38017683-AA
RUN (green)
ERROR (red)
MAINT (yellow)
P1 LINK/TX/RX (green/yellow)
P2 LINK/TX/RX (green/yellow)
LED display on the interface module
4
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