Glossary
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
12-7
Instance data block
A DB is automatically generated and assigned to every function block call in the
STEP 7 user program. The values of the input, output and in/out parameters are
stored in the instance data block, together with local block data.
Interface, multipoint
--> MPI
Interrupt, delay
The delay interrupt belongs to one of the priority classes when processing
programs in SIMATIC S7. It is started on expiration of a time generated in the user
program. A corresponding organization block is then executed.
Interrupt, Diagnostics
--> Diagnostic Interrupt
Interrupt, Process
--> Process Interrupt
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