Fail-Safe Blocks; Overview - Siemens SIMATIC S7 F Manual

8

Fail-Safe Blocks

8.1

Overview

8.1.1 Fail-Safe Blocks
All the fail-safe blocks are contained in the Failsafe Blocks library in the catalog of
libraries
If possible, the F-Blocks are assigned to the existing families of standard blocks in
the catalog of the blocks used
begin with "F_", they appear together as a group.
Fail-safe blocks are available in the following block families:
DRIVER
COM_FUNC
F_SYSTEM
CONVERT
F_CTRL
BIT_LGC
COMPARE
FLIPFLOP
IEC_TC
IMPULS
MATH_INT
MATH_FP
MULTIPLX
Fail-Safe Systems
A5E00085588-03
.
. Since the names of the F-Blocks always
Driver Blocks for F-I/Os
Blocks for F Communication Between CPUs
F system blocks
Blocks for converting data between standard and
safety sections
F Control Blocks
Logic blocks with the BOOL data type
Comparison blocks for two input values of the same
type
Flipflop blocks
IEC pulse and counter blocks
Pulse blocks
Arithmetic blocks with the INT data type
Arithmetic blocks with the REAL data type
Multiplex blocks
8-1