Program instructions
7.1 Bit logic
S7-200 SMART
180
System Manual, V2.3, 07/2017, A5E03822230-AF
7.1.9
Set and reset dominant bistable
LAD/FBD
1
Description
The bit parameter assigns the Boolean address that is set or reset. The optional OUT connection
reflects the signal state of the Bit parameter.
SR (Set dominant bistable) is a latch where the set dominates. If the set (S1) and reset (R) signals
are both true, the output (OUT) is true.
RS (Reset dominant bistable) is a latch where the reset dominates. If the set (S) and reset (R1) sig-
nals are both true, the output (OUT) is false.
1
Not applicable for STL
Input / outputs
Data type
Operand
bit
BOOL
I, Q, V, M, S
S1, R (LAD SR)
BOOL
Power flow
S, R1 (LAD RS)
BOOL
Power flow
OUT (LAD)
BOOL
Power flow
S1, R (FBD SR)
BOOL
I, Q, V, M, SM, S, T, C, L, Logic flow
S, R1 (FBD RS)
BOOL
I, Q, V, M, SM, S, T, C, L, Logic flow
OUT (FBD)
BOOL
I, Q, V, M, SM, S, T, C, L, Logic flow
SR truth table
S1
R
Out (bit)
0
0
Previous state
0
1
0
1
0
1
1
1
1
RS truth table
S
R1
Out (bit)
0
0
Previous state
0
1
0
1
0
1
1
1
0
Содержание SIMATIC S7-200
Страница 30: ...Product overview 1 7 Programming software S7 200 SMART 30 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 267: ...Program instructions 7 6 Counters S7 200 SMART System Manual V2 3 07 2017 A5E03822230 AF 267 HSC modes 3 and 4 ...
Страница 394: ...Program instructions 7 18 Subroutine S7 200 SMART 394 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 425: ...Communication 8 5 PROFIBUS S7 200 SMART System Manual V2 3 07 2017 A5E03822230 AF 425 ...
Страница 786: ...Technical specifications A 11 S7 200 SMART cables S7 200 SMART 786 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 798: ...Error codes C 4 PLC fatal error codes S7 200 SMART 798 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 848: ...Ordering information F 6 Human Machine Interface devices S7 200 SMART 848 System Manual V2 3 07 2017 A5E03822230 AF ...