AH500 Programming Manual API 1513 Symbol: S ： Source device Double word D ： Device in which the operation result is stored Double word Explanation: 1. Exponentiation involves two numbers, the base e which represents 2.71828, and the exponent in the device specified by S . 2. EXP[ D +1, D ]=[ S +1, S ]. 3. The number in the device specified by S can be a positive number or a negative number. The register specified by D should be a 32-bit register, and the number in the device specified by S should be a floating-point number. 4. The value in the register specified by D is e S . (e is 2.71828, and S represents the source data.) 5.
If the absolute value of the conversion result is larger than the value which can be represented by the maximum floating-point number, the value in the register specified by D is 16#7F800000, and SM602 is ON. 6. If the operation result stored in D is 0, SM600 is ON. Example: 1. When X0.0 is ON, the value in (D1, D0) is converted into the floating-point number, and the conversion result is stored in (D11, D10). 2. When X0.1 is ON, the exponentiation with the value in (D11, D10) as the exponent is performed. The result is a floating-point number, and is stored in (D21, D20).
6-342 Instruction code Operand Function FEXP P S, D An exponent of the floating-point number Device X Y M S T C HC D L SM SR E PR K 16# “$” DF S D Pulse instruction 16-bit instruction (5-6 steps) 32-bit instruction AH500 AH500 -