Blocks Of The Safety Program - Siemens SIMATIC S7 F Manual

Programming
5.1.2

Blocks of the Safety Program

Fail-Safe Blocks
A Safety Program can contain the following fail-safe blocks:
•
Fail-safe blocks that can be inserted by the user (F user blocks)
F User Blocks
F-Driver
F_CH_DI
F_CH_AI
F_CH_DO
Conversion
F_BO_FBO
F_I_FI
F_R_FR
F_TI_FTI
F_FBO_BO
F_FI_I
F_FR_R
F_FTI_TI
F_QUITES
F_FR_FI
RTG – RTG
Communication
F_S_BO, F_S_R
F_R_BO, F_R_R
CPU – CPU
Communication
F_SENDBO,
F_SENDR
F_RCVBO, F_RCVR
F_START
5-2
Function
Channel driver for the input and output signals of the F-I/Os
Conversion from standard to F-data types
Conversion from F to standard data types
Fail-safe acknowledgment via the ES/OS
Conversion from F_REAL to F_INT.
Communication between F-run-time groups
Communication with Safety Programs on other CPUs
Signals a cold restart or warm restart.
Fail-Safe Systems
A5E00085588-03