Siemens SIMATIC S5 - Page 254

List of Operations S5-115F Manual
for organization blocks (OB)
for program blocks (PB)
for function blocks (FB)
for sequence blocks (SB)
Function
Execution time
in µsec.
CPU
942F
I Q F T C 321
Ope-
ration
(STL)
1 RLO-depend.?
2 RLO affected?
3 RLO reloaded?
Operands
Other Operations
I
DO=
N N N 43
N N N 122 *
Increment the low byte (bits 0 to 7) of ACCUM 1 by the value of
n (n = 0 to 255)
Process block. (Only C DB, JU PB, JU FB, JU SB can be substituted)
Formal operand
• • • • •
D N N N 43
Decrement the low byte (bits 0 to 7) of ACCUM 1 by the value of
n (n = 0 to 255)
RA N N N 50
Enable interrupt:
cancels the effect of IA
IA N N N 50
Disable interrupt: input/output interrupt or timer OB
processing is disabled
DO DW ** N N N
FW **DO N N N 102
Process flag word: the next operation is combined (ORed) with
the parameter specified in the flag word and executed **.
118
Process data word: the next operation is combined (ORed) with
the parameter specified in the data word and executed **.
* Plus execution time of the substituted operation
** Permissible operations:
A, AN, O, ON; L, LC, T;
S, R, =; JU, JC, JZ, JN, JP, JM, JO, SLW, SRW;
FR T, R T, SF T, S DT , SI T, SS T, SE T;D, I;
FR C, RC, SC, CD C, CU C C DB; T RS, TNB
A-14 EWA 4NEB 811 6149-02