Siemens SIMATIC S5-95F - Page 548

S5-95F Operations List
Oper-
ation
(STL)
Permissible
Operands
1 RLO depend.
2 RLO affected
3 RLO reloaded
123
Typical
Execution Time
in µs
On- Ext.
board I/O
Function
CU C Y
N Y 18 Counter counts up 1
CD C Y
N Y 18 Counter counts down 1
SCY
N Y 56 Set counter
R C Y N Y 17 Reset counter
+F N N N 19 Add two fixed-point numbers: ACCU 1+ACCU 2.
CC 1 / CC 0 / OV are affected.
-F N N N 22 Subtract one fixed-point number from another:
ACCU 2 - ACCU 1. CC 1 / CC 0 / OV are affected.
!=F N Y N 21 Compare two fixed-point numbers for "equal to": If
ACCU 2=ACCU 1, the RLO is "1".
CC 1 / CC 0 are affected.
><F N Y N 22 Compare two fixed-point numbers for "not equal to": If
ACCU 2 ACCU 1, the RLO is "1".
CC 1 / CC 0 are affected.
>F N Y N 22 Compare two fixed-point numbers for "greater than":
If ACCU 2 > ACCU 1, the RLO is "1".
CC 1 / CC 0 are affected.
>=F N Y N 22 Compare two fixed-point numbers for "greater than or
equal to": If ACCU 2 ACCU 1, the RLO is "1".
CC 1 / CC 0 are affected.
<F N Y N 22 Compare two fixed-point numbers for "less than":
If ACCU 2 < ACCU 1, the RLO is "1".
CC 1 / CC 0 are affected.
<=F N Y N 22 Compare two fixed-point numbers for "less than or equal
to": If ACCU 2 ACCU 1, the RLO is "1".
CC 1 / CC 0 are affected.
Counter Operations
Arithmetic Operations
Comparison Operations
for organization blocks (OB)
for program blocks (PB)
for function blocks (FB)
for sequence blocks (SB)
EWA 4NEB 812 6210-02 C-5