Table 7-1 Fail-Safe Blocks Of An F-Runtime Group - Siemens SIMATIC S7 System Manual

Programming F-Systems
7.3 Structure of the Safety Program in S7 Distributed Safety
F-Blocks of an F-Runtime Group
The F-blocks that the user employs in an F-runtime group are shown in the table below:
Table 7-1
F-Block
F-CALL
F-FB/F-FC,
F-PB
F-DB
F-I/O DB
7-6
Fail-safe Blocks of an F-Runtime Group
Function
F-block for calling the F-runtime group from the standard user
program. The F-CALL contains the call for the
F-program block and the calls for the automatically added
F-blocks of the F-runtime group.
The F-CALL is created by the user and cannot be edited.
The user programs the actual safety function using F-FBD or F-LAD.
The starting point for F-programming is the
F-program block. The F-PB is an F-FC or F-FB (with instance DB) that
becomes the F-PB when assigned to the F-CALL. The user can
perform the following in the F-PB:
Program the safety program with F-FBD or F-LAD
•
Call other created F-FBs/F-FCs for structuring the safety program
•
Insert F-blocks of the
•
block container from the
Insert F-blocks from "custom F-libraries"
•
The user defines the call sequence of the F-blocks within the F-PB.
Optional fail-safe data blocks that that can be read/write-accessed
from anywhere in the safety program
An F-I/O DB is automatically generated for each F-I/O when the
HW Config
program is compiled in
variables of the F-I/O DB in conjunction with F-I/O accesses.
F-Application Blocks
Distributed Safety
F-library (V1)
. The user can or must access the
System Manual, 04/2006, A5E00109529-05
Programming
Language
F-CALL
F-FBD/F-LAD
F-DB
-
Safety Engineering in SIMATIC S7