Diagnostics Using Status And Error Leds; Introduction - Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual

Further Information
At the Web address "www.profibus.com", you will find information on SNMP in the Network
Management standardization group.
At the Web address "www.snmp.org", you will find further details on SNMP.
At the Web address "www.siemens.com/snmp-opc-server", you will find further information
on the SNMP OPC server.
10.6

Diagnostics using status and error LEDs

10.6.1

Introduction

Diagnostics with LEDs is an initial tool for error localization. Usually, you evaluate the
diagnostic buffer for further error localization.
The buffer contains plain text information on the error that has occurred. For example, you
will find the number of the appropriate error OB here. If you generate this error OB, you can
prevent the CPU from going into STOP mode.
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
Debugging functions, diagnostics and troubleshooting
10.6 Diagnostics using status and error LEDs
10-9