Siemens SINUMERIK 828D Training Manual page 238

Section 3
Notes
B058
B058
Interrupt Routines
To use the interrupt blocks they must exist in the user PLC program. to check
their existence use the following soft-keys:-
OR
The above list shows that the blocks are not loaded. To load the blocks select
the "Add" soft-key.
The option to add interrupt block INT100 is given. Details can be added to
identify the author and indicate the purpose of the block. Use the "OK" soft-key
to complete the action.
The interrupt should now appear in the list.
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