Siemens SIMATIC ET 200S IM151-1 FO STANDARD Manual page 55

Error and system messages
4.4 Diagnostics with STEP 7
Process interrupt of digital input modules
Figure 4-11
Process interrupt of analog input modules
Figure 4-12
54
Structure as of byte x+4 for process interrupt (digital input)
Structure as of byte x+4 and byte x+5 for process interrupt (analog input)
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
Manual, 02/2010, A5E01075965-03