Technical data

Basics of Designing a Program Structure
4.2 Blocks in the User Program
Programming with STEP 7
98 Manual, 05/2010, A5E02789666-01
Additional Information
For more detailed information about SFBs and SFCs, refer to the "System Software for S7-300 and
S7-400, System and Standard Functions" Reference Manual. The "S7-300 Programmable
Controller, Hardware and Installation Manual" and "S7-400, M7-400 Programmable Controllers
Module Specifications Reference Manual" explain which SFBs and SFCs are available.