8 Application Instructions API 100-149 API 118 Operands: S : Source D : Result Explanations: 1. See the specifications of each model for their range of use. 2. Flags: M1020 (zero flag); M1021 (borrow flag); M1022 (carry flag) 3. This instruction converts binary floating point value in the register designated by S into decimal floating point value and stores it in the register designated by D . 4. PLC conducts floating point operation in binary format. DEBCD instruction is exclusively for converting floating 5. If the absolute value of the result ＞ maximum floating point available, the carry flag M1022 = On. points from binary to decimal. 6.
If the absolute value of the result ＜ minimum floating point available, the borrow flag M1021 = On. 7. If the result = 0, the zero flag M1020 = On. Program Example: When X0 = On, the binary floating points in D1 and D0 will be converted into decimal floating points and stored in D3 and D2. X0 Binary Floating Point 32 bits for real number, 8 bits for exponent 1 bit for symbol bit 32 bits for real number, 8 bits for exponent 1 bit for symbol bit [D2] * 10 [D3] Decimal Floating Point Exponent Real number Exponent Real number Remarks: For floating point operations, see “5.3 Handling of Numeric Values”.
DVP-PLC Application Manual 8-32 Mnemonic Operands Function D EBCD P Float to Scientific Conversion Type OP Bit Devices Word Devices Program Steps X Y M S K H KnX KnY KnM KnS T C D E F DEBCD, DEBCDP: 9 steps S * D * PULSE 16-bit 32-bit EH3 ES EX SS SA SX SC EH SV EH3 SV2 ES EX SS EH3 ES EX SS SA SX SC EH SV SA SX SC EH SV SV2 SV2 DEBCD D0 D2 D1 D0 D3 D2