Technical data

Appendix
27.7 Accessing Process and I/O Data Areas
Programming with STEP 7
Manual, 05/2010, A5E02789666-01 675
Module Start Address
The module start address is the lowest byte address of a module. It represents the start address of
the user data area of the module and is used in many cases to represent the entire module.
The module start address is, for example, entered in hardware interrupts, diagnostic interrupts,
insert/remove module interrupts, and power supply error interrupts in the start information of the
corresponding organization block and is used to identify the module that initiated the interrupt.