Mitsubishi Electric M800VW Series Programming Manual page 221

Plc programming

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M800V/M80V Series PLC Programming Manual (1/2)

8 Function Instructions

8.2 Arithmetic Operation Instructions

 Divides the 32-bit floating-point real number designated by (S1) by the 32-bit floating-point real number designated by (S2)

and stores the result of the division at the device designated by (D).

32-bit floating-point real

 The following values can be designated and stored by (S1), (S2), or (D).

≤ | Designated value (stored value) | < 2

 When setting input values from programming tools, rounding errors may occur.

For precautions when setting input values from programming tools, refer to "6.3.4 Single/Double-Precision Real Number

 Operation errors

 In the following cases, an arithmetic error occurs, the error flag (SM0) turns ON, and an error code is stored at SD0.

- The divisor (S2) is "0". (Error code: 34)

- The operation result exceeds the following range. (When an overflow occurs) (Error code: 36)

| Operation result | < 2

- The designated device value is "-0", unnormalized number, nonnumeric, or ± ∞ . (Error code: 35)

 Program example

 The following program multiplies the 32-bit floating-point real number data at D3 and D4 by the 32-bit floating-point real

number data at D10 and D11 when X20 turns ON, and stores the result of the multiplication at R0 and R1.

[Ladder mode]

 The following program divides the 32-bit floating-point real number data at (D10) and (D11) by the 32-bit floating-point real

number data at (D20) and (D21), and stores the result of the division at (D30) and (D31).

[Ladder mode]

IB-1501667-B

32-bit floating-point real

E*P D3 D10 R0

E/P D10 D20 D30

32-bit floating-point real

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