Siemens SIMATIC ET 200S IM151-1 FO STANDARD - Page 51

Error and system messages
4.4 Diagnostics with STEP 7
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
50 Manual, 02/2010, A5E01075965-03
Diagnostic interrupt from the modules, byte x+8 to byte x+11
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Figure 4-7 Structure of byte x+8 to byte x+11 for diagnostic frame