Delta AH500 Programming Manual page 261

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Instruction code

Explanation:

The single-precision floating-point number in the register specified by S is converted into the

decimal floating-point number, and the conversion result is stored in the register specified by

The floating-point operation in the PLC is based on the single-precision floating-point numbers,

and the instruction FBCD is used to convert the single-precision floating-point number into the

decimal floating-point number.

The Flags: SM600 (zero flag), SM601 (borrow flag), and SM602 (carry flag)

When the absolute value of the conversion result is larger than the value which can be

represented by the maximum floating-point number, SM602 is ON.

When the absolute value of the conversion result is less than the value which can be

represented by the minimum floating-point number, SM601 is ON.

When the conversion result is zero, SM600 is ON.

When X0.0 is ON, the single-precision floating-point number in (D1, D0) is converted into the

decimal floating-point number, and the conversion result is stored in (D3, D2).

Binary floating-point number

Decimal fl oating-point number

Additional remark:

If the value in S exceeds the range of values which can be represented by the floating-point

numbers, the instruction is not executed, SM0 is ON, and the error code in SR0 is 16#2013.

Pulse instruction 32-bit instruction (5 steps) 64-bit instruction

S ： Data source

D ： Conversion result

Real number: 23 bits; Ex ponent: 8 bi ts ; sign: 1 bit

Mathem atic al form

Ch a pt er 6 Ap p l i ed I ns t r uc t i ons

Converting the binary floating-point

number into the decimal

floating-point number

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