Siemens NAN 67 Series Wartungshandbuch Seite 151

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11-7
Ladder Logic (LAD) for S7-300 and S7-400
C79000-G7076-C504-02
11.6 Multiply Double Integer
A signal state of 1 at the Enable (EN) input activates the Multiply Double
Integer instruction. This instruction multiplies inputs IN1 and IN2. The result
can be scanned at OUT. If the result is outside the permissible range for a
double integer, the OV and the OS bit of the status word are 1 and the ENO is
0.
Certain restrictions apply to the placement of integer math boxes (see
Section 6.1).
Table 11-6 Multiply Double Integer Box and Parameters
LAD Box Parameter Data Type Memory Area Description
MUL DI
EN BOOL I, Q, M, D, L Enable input
MUL_DI
EN ENO
ENO BOOL I, Q, M, D, L Enable output
IN1
EN ENO
IN1 DINT I, Q, M, D, L First value for multiplication
IN1
IN2 OUT
IN2 DINT I, Q, M, D, L Second value for multiplication
IN2 OUT
OUT DINT I, Q, M, D, L Result of multiplication
Status Word Bits
BR CC 1 CC 0 OV OS OR STA RLO FC
Write x x x x x x 1 x x
I 0.0
A signal state of 1 at input I 0.0 activates the
MUL_DI box. The result of the multiplication
MD0 x MD4 is put into memory double word
MD10. If the result is outside the permissible
range for a double integer or the signal state of
input I 0.0 is 0, output Q 4.0 is set.
Q 4.0
MUL_DI
IN2
EN ENO
MD4 MD10
IN1MD0
S
Function is executed (EN = 1):
NOT
OUT
Figure 11-6 Multiply Double Integer
Description
Integer Math Instructions
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