Siemens SIMATIC S5 - A.5 Evaluation of CC 1 and CC

List of Operations S5-115F Manual
Q F
for organization blocks (OB)
for program blocks (PB)
for function blocks (FB)
for sequence blocks (SB)
Function
Execution time
in µsec.
CPU
942F
I T C 321
Ope-
ration
(STL)
1 RLO-depend.?
2 RLO affected?
3 RLO reloaded?
Operands
Other Operations
N 128
N 47
DI * N N
N NSTS
TAK N N N 47
Process via the formal operand (indirect).
The number of the formal operand is in ACCUM 1.
Stop operation: Program processing is interrupted immediately
after this operation.
Swap the contents of ACCUM 1 and ACCUM 2
Formal operand
• • • • •
* Do not use DI in the safety-related parts of programs.
A.5 Evaluation of CC 1 and CC 0
CC 1
Arithmetic
operations
Digital
logic
operations
Comparison
operations
CC 0
Shift
operations
Conversion
operations
0 0
Result
= 0
Result
= 0
ACCUM 2
= ACCUM 1
Shifted
bit = 0
-
0 1
Result
< 0
-
ACCUM 2
< ACCUM 1
-
Result
< 0
1 0
Result
> 0
Result
0
ACCUM 2
> ACCUM 1
Shifted
bit = 1
Result
> 0
A-16 EWA 4NEB 811 6149-02