Siemens NAN 67 Series Manual de Serviço descarregar pdf (Página 89)

6-15

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

Tables 6-10 through 6-15 list the significance of CC 1 and CC 0 after your

program executes certain instructions.

Table 6-10 CC 1 and CC 0 after Math Instructions, without Overflow

CC 1 CC 0 Explanation

0 0 Result = 0

0 1 Result < 0

1 0 Result > 0

Table 6-11 CC 1 and CC 0 after Integer Math Instructions, with Overflow

CC 1 CC 0 Explanation

0 0 Negative range overflow in Add Integer and Add Double Integer

0 1

Negative range overflow in Multiply Integer and Multiply

Double Integer

Positive range overflow in Add Integer, Subtract Integer, Add

Double Integer, Subtract Double Integer, Twos Complement

Integer, and Twos Complement Double Integer

1 0

Positive range overflow in Multiply Integer and Multiply Double

Integer, Divide Integer, and Divide Double Integer

Negative range overflow in Add Integer, Subtract Integer, Add

Double Integer, and Subtract Double Integer

1 1

Division by 0 in Divide Integer, Divide Double Integer, and

Return Fraction Double Integer

Table 6-12 CC 1 and CC 0 after Floating-Point Math Instructions, with Overflow

CC 1

CC 0 Explanation

0 0 Gradual underflow

0 1 Negative range overflow

1 0 Positive range overflow

1 1 Illegal operation

Configuration and Elements of Ladder Logic

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 317 318

Sem comentários

Siemens NAN 67 Series Manual de Serviço Página 89