Siemens SIMATIC S7 F User Manual

Fail-Safe Blocks
Fail-Safe Systems
A5E00085588-03
8-143
Block
Name
Block
Number
Function Maximum Run
Time with
Dynamically
Connected Inputs
in
V
F_R_R FB 393 Fail-safe receipt of 5 data items of the data type F_REAL
from another F-run-time group
40
F_R_TRIG FB 346 Detection of the rising edge 13
F_RCVBO FB 371 Receives F_BOOL data from another CPU 1250
F_RCVR FB 373 Receives F_REAL data from another CPU 770
F_RS_FF FB 307 RS flipflop, resetting dominant 16
F_S_BO FB 390 Fail-safe transmission of 10 data items of the data type
F_BOOL to another F run-time group.
12
F_S_R FB 392 Fail-safe transmission of 5 data items of the data type F_
to another F run-time group
12
F_SENDBO FB 370 Sends F_BOOL data to another CPU 1320
F_SENDR FB 372 Sends F_REAL data to another CPU 1420
F_SHUTDN FB 458 F Run-time group shutdown and restart management 21
F_SMP_AV FB 333 Sliding mean value 391
F_SQRT FB 330 Calculation of the square root 58
F_SR_FF FB 308 SR flipflop, setting dominant 16
F_START FB 394 Startup detection (cold restart or warm restart) 11
F_SUB_R FB 322 Subtraction of two REAL values 16
F_TEST FB 398 Self-test for commands not backed up by diversity 362
F_TESTC FB 399 Control block for the background self-test of the CPU 445
F_TESTM FB 400 Switching of Safety Mode on and off 178
F_TI_FTI FB 368 Converts from TIME to F_TIME 12
F_TOF FB 344 Timer off-delay 24
F_TON FB 343 Timer on-delay 24
F_TP FB 342 Timer pulse 24
F_XOR2 FB 303 XOR logic operation on two inputs 13
F_XOUTY FB 306 Binary selection X out of Y 74
DB_INIT FC 180 F-run-time group coldstart initialization logic 11
DB_RES FC 301 Supports the startup characteristics in the event of a cold
restart/warm restart of the CPU
To be supplied
FAIL_MSG FC 181 F-run-time group shutdown diagnostic error reporting Included in
RTG_LOGIC
RTG_LOGIC FB 459 F-run-time group shutdown and restart logic interface 12
Run times of F block types
For a first estimate, add the run times of the called blocks. An exact run time can
only be obtained by measurement.

Siemens SIMATIC S7 F Specifications

General

Brand	Siemens
Model	SIMATIC S7 F
Category	Controller
Language	English