Siemens SIMATIC S7 F Manual page 330

Fail-Safe Blocks
Block Block
Name Number
F_CH_DO FB 378
F_CH_AI FB 379
Further Blocks (in Alphabetical Order)
F_1oo2_R FB 457
F_2OUT3 FB 305
F_2oo3_R FB 456
F_ABS_R FB 325
F_ADD_R FB 321
F_AND4 FB 301
F_AVEX_R FB 331
F_BO_FBO FC 303
F_CTUD FB 341
F_CYC_CO FB 395
F_DIV_R FB 324
F_F_TRIG FB 347
F_FBO_BO FC 363
F_FI_I FC 305
F_FR_FI FB 461
F_FR_R FC 304
F_FTI_TI FC 306
F_I_FI FB 369
F_LIM_HL FB 314
F_LIM_I FB 350
F_LIM_LL FB 315
F_LIM_R FB 329
F_LIM_TI FB 345
F_MAX3_R FB 326
F_MID3_R FB 327
F_MIN3_R FB 328
F_MUL_R FB 323
F_MUX2_R FB 332
F_NOT FB 304
F_OR4 FB 302
F_PLK FB 396
F_PLK_O FB 397
F_QUITES FB 367
F_R_BO FB 391
F_R_FR FB 362
8-142
Function
•
F channel driver for digital output
•
F channel driver for analog input
1 out of 2 analog voter block (block type)
Binary selection 2 out of 3
2 out of 3 analog voter block (block type)
Calculation of the absolute value
Addition of two REAL values
AND logic operation on four inputs
Mean value of a maximum of nine REAL values
Convert from BOOL to F_BOOL
Up and down counter
F cycle time monitoring
Division of two REAL values
Detection of the falling edge
Convert from F_BOOL to BOOL
Convert from F_INT to INT
Convert from F_REAL to F_INT
Convert from F_REAL to REAL
Convert from F_TIME to TIME
Converts from INT to F_INT
Monitoring of upper limit value violation of a REAL value
Asymmetrical limiter of INT values
Monitoring of lower limit violation of a REAL value
Asymmetrical limiter of REAL values
Asymmetrical limiter of TIME values
Maximum of three REAL values
Medium of three REAL values
Minimum of three REAL values
Multiplication of two REAL values
Multiplexer 1 out of 2 for REAL values
NOT logic operation
OR logic operation on four inputs
Program execution monitoring before output blocks
Program execution monitoring after output blocks
Fail-safe acknowledgment via the ES/OS
Fail-safe receipt of 10 data items of the data type
F_BOOL from another F run-time group
Convert from REAL to F_REAL
Maximum Run
Time with
Dynamically
Connected Inputs
V
in
44
130
5900
16
7650
12
16
13
98
10
28
280
18
13
9
9
13
10
10
11
24
21
24
40
26
18
21
18
18
17
11
15
To be supplied
To be supplied
24
44
11
Fail-Safe Systems
A5E00085588-03