Siemens SIMATIC Distributed I/O System DP/ASi Link, Руководство пользователя

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8-1
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
Diagnostics and Error Handling
You use the chapter entitled ”Diagnostics and Error Handling” to evaluate the
diagnosis of the DP/ASi link and to take the necessary action.
You have two diagnostic options which refer you to the location at which the
diagnostic information is stored.
Diagnosis by means of LEDs gives you the opportunity to evaluate mes-
sages and to remedy any errors which have occurred.
The diagnostic message gives you the opportunity to react to fail-state
characteristics of the DP/ASi link by means of the user program of the
DP master or the higher level PLC.
The COM ET 200 Windows configuration software has an integrated online
Help which enables you to activate context-sensitive Help. A description of
the error messages is therefore not necessary at this stage.
You can read the DP/ASi link diagnosis into your PLC using the IM308C
module with function block IM308C (FB 192, FKT = SD).
You will find an in-depth description of FB IM308C and the diagnostic op-
tions in respect of the PROFIBUS-DP in the Distributed I/O System ET 200
manual.
If you wish to operate the DP/ASi link as a DP slave with a SIMATIC
S7/M7 DP master, the DP/ASi link behaves like a central S7-300 module.
You read out the diagnosis (data records 0 and 1) using the SFC 13
”DPNRM_DG”. You will find information on requesting diagnostic data in
the STEP 7 Standard and System Functions manual.
In Section You Will Find on Page
8.1 Diagnostics by Means of LEDs of DP/ASi Link 8-2
8.2 Diagnostics by Means of User Program 8-6
Introduction
Diagnostic options
Online Help
Diagnosing with
IM308C
Diagnosing with a
S7/M7 DP master
In this chapter
8