Floating-Point Sign Inversion (Double Precision) - Mitsubishi Electric MELSEC-Q/L Programming Manual

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Floating-point sign inversion (double precision)

(D): Head number of the devices where the 64-bit floating decimal point data whose sign is to be reversed is stored (real number)

Internal device

Processing details

• Reverses the sign of the 64-bit floating decimal point type real number data designated by (D), and stores at the device

designated by (D).

• Used when reversing positive and negative signs.

Operation error

• In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into SD0.

Error details

The specified device value is not within the following range:

 | Specified device value | < 2

The specified device value is -0, unnormalized number, nonnumeric, and .

Program example

• The following program inverts the sign of the 64-bit floating decimal point type real number data at D0 to D3 when X20 goes

ON, and stores result at D0 to D3.

[Ladder Mode]

6 BASIC INSTRUCTIONS

6.3 Data Conversion Instructions