
11-8
Ladder Logic (LAD) for S7-300 and S7-400
C79000-G7076-C504-02
11.7 Divide Integer
A signal state of 1 at the Enable (EN) input activates the Divide Integer
instruction. This instruction divides input IN1 by IN2. The integer quotient
(truncated result) can be scanned at OUT. The remainder cannot be scanned.
If the quotient is outside the permissible range for an 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 11-7 Divide Integer Box and Parameters
LAD Box Parameter Data Type Memory Area Description
EN BOOL I, Q, M, D, L Enable input
DIV_I
ENO BOOL I, Q, M, D, L Enable output
IN1 INT I, Q, M, D, L Dividend
IN2 INT I, Q, M, D, L Divisor
OUT INT I, Q, M, D, L Result of division
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
DIV_I box. The quotient of dividing MW0 by
MW2 is put into memory word MW10. If the
quotient is outside the permissible range for
an integer or the signal state of input I 0.0
is 0, output Q 4.0 is set.
Q 4.0
DIV_I
IN2
EN ENO
MW2 MW10
IN1MW0
S
Function is executed (EN = 1):
NOT
OUT
Figure 11-7 Divide Integer
Description
Integer Math Instructions
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