Siemens SIMATIC S7 F Manual page 14

Contents
8.5.5 F_START ........................................................................................................8-54
8.6 F Control Blocks ..............................................................................................8-55
8.6.1 F_CYC_CO .....................................................................................................8-56
8.6.2 F_M_DI8..........................................................................................................8-58
8.6.3 F_M_DI24........................................................................................................8-61
8.6.4 F_M_DO8........................................................................................................8-64
8.6.5 F_M_DO10......................................................................................................8-66
8.6.6 F_M_AI6..........................................................................................................8-68
8.6.7 F_PLK .............................................................................................................8-70
8.6.8 F_PLK_O.........................................................................................................8-71
8.6.9 F_SHUTDN .....................................................................................................8-72
8.6.10 F_TEST ...........................................................................................................8-77
8.6.11 F_TESTC ........................................................................................................8-78
8.6.12 F_TESTM ........................................................................................................8-79
8.6.13 DB_RES ..........................................................................................................8-80
8.6.14 DB_INIT...........................................................................................................8-81
8.6.15 FAIL_MSG.......................................................................................................8-82
8.6.16 RTG_LOGIC....................................................................................................8-83
8.6.17 SFC F_CTRL...................................................................................................8-84
8.7 Logic Blocks with the BOOL Data Type..........................................................8-85
8.7.1 F_AND4...........................................................................................................8-85
8.7.2 F_OR4.............................................................................................................8-87
8.7.3 F_XOR2 ..........................................................................................................8-88
8.7.4 F_NOT.............................................................................................................8-89
8.7.5 F_2OUT3.........................................................................................................8-89
8.7.6 F_XOUTY........................................................................................................8-91
8.8 Comparison Blocks for Two Input Values of the Same Type .........................8-92
8.8.1 F_LIM_HL........................................................................................................8-92
8.8.2 F_LIM_LL ........................................................................................................8-94
8.8.3 F_2oo3_R........................................................................................................8-96
8.8.4 F_1oo2_R........................................................................................................8-98
8.9 Flip-Flop Blocks.............................................................................................8-100
8.9.1 F_RS_FF.......................................................................................................8-100
8.9.2 F_SR_FF.......................................................................................................8-102
8.10 IEC Pulse and Counter Blocks......................................................................8-103
8.10.1 F_CTUD ........................................................................................................8-103
8.10.2 F_TP..............................................................................................................8-105
8.10.3 F_TON...........................................................................................................8-107
8.10.4 F_TOF ...........................................................................................................8-109
8.11 Pulse Blocks..................................................................................................8-111
8.11.1 F_F_TRIG .....................................................................................................8-111
8.11.2 F_R_TRIG .....................................................................................................8-112
8.11.3 F_LIM_TI .......................................................................................................8-113
8.12 Arithmetic Blocks with the INT Data Type.....................................................8-114
8.12.1 F_LIM_I .........................................................................................................8-114
8.13 Arithmetic Blocks with the REAL Data Type .................................................8-115
8.13.1 F_ADD_R ......................................................................................................8-115
8.13.2 F_SUB_R ......................................................................................................8-116
8.13.3 F_MUL_R ......................................................................................................8-117
8.13.4 F_DIV_R........................................................................................................8-118
8.13.5 F_ABS_R ......................................................................................................8-119
8.13.6 F_MAX3_R....................................................................................................8-120
8.13.7 F_MID3_R .....................................................................................................8-121
8.13.8 F_MIN3_R .....................................................................................................8-122
xiv
Fail-Safe Systems
A5E00085588-03