Check Lists
Fail-Safe Systems
A5E00085588-03
A-7
A.3 Check List of the Certified F-Blocks
Only the F-Blocks listed below can be used to program the F user program. These
blocks are fail-safe and certified.
Please compare the signature and initial value signature of these F-Blocks with
those in the current Annex 1 of the report for the "Safety-Related Programmable
Systems SIMATIC S7-400F and S7-400FH" certificate.
If the initial value signature is not in the printout of the safety program, the
signature must be compared with the CRC in Revision 1.0 of Annex 1 and checked
in SIMATIC Manager to see if the F FB is Version 1.0.
Block
Name
Block
Number
Function Check
Driver Blocks
F_M_AI6 FB 383 F module driver for 6-channel analog input
F_M_DI8 FB 384 F module driver for 8-channel digital input
F_M_DI24 FB 385 F module driver for 24-channel digital input
F_M_DO8 FB 388 F module driver for 8-channel digital output
F_M_DO10 FB 386 F module driver for 10-channel digital output
F_CH_DI FB 377 F channel driver for digital input
F_CH_DO FB 378 F channel driver for digital output
F_CH_AI FB 379 F channel driver for analog input
Further Blocks (in Alphabetical Order)
F_1oo2_R FB 457 1 out of 2 analog voter block (Block Type)
F_2OUT3 FB 305 Binary selection 2 out of 3
F_2oo3_R FB 456 2 out of 3 analog voter block (Bock Type)
F_ABS_R FB 325 Calculation of the absolute value
F_ADD_R FB 321 Addition of two REAL values
F_AND4 FB 301 AND logic operation on four inputs
F_AVEX_R FB 331 Mean value of a maximum of nine REAL
values
F_BO_FBO FC 303 Convert from BOOL to F_BOOL
F_CTUD FB 341 Up and down counter
F_CYC_CO FB 395 F cycle time monitoring
F_DIV_R FB 324 Division of two REAL values
F_F_TRIG FB 347 Detection of the falling edge
F_FBO_BO FC 363 Convert from F_BOOL to BOOL
F_FI_I FC 305 Convert from F_INT to INT
F_FR_FI FB 461 Convert from F_REAL to F_INT
F_FR_R FC 304 Convert from F_REAL to REAL
F_FTI_TI FC 306 Convert from F_TIME to TIME
F_I_FI FB 369 Converts from INT to F_INT
F_LIM_HL FB 314
Monitoring of upper limit value violation of a
REAL value
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