[Instruction] Contents

Basic Function InstructionFUN 21 D P→BINBCD TO BIN CONVERSION(Converts BCD data of the device specified at S into BIN and stores the result in D)FUN 21 D P→BINOperandS : The register to be convertedD : The register to store the converted data(BIN code)The S, D may combine with V, Z, P0~P9 toserve indirect addressingRangeOperandWX WY WM WS TMR CTR HR IR OR HR HSCR RTCR SR ROR DRWX0∣WX240WY0∣WY240WM0∣WM1896WS0∣WS984T0∣T255C0∣C255R0∣R3839R3840∣R3903R3904∣R3919R3920∣R4047R4096∣R4127R4128∣R4135R4136∣R4167R5000∣R8071S ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○D ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○* ○* ○D0∣D4095●●●The decimal (BCD) data must be converted to binary (BIN) data first in order for PLC to accept the datawhich is originally in decimal unit (BCD code) inputted from external device such as digital switch becausethe BCD data can not be accepted by PLC for its operations.Converts BCD data of the device specified at S into BIN and writes the result in D when the operationcontrol input "EN" =1 or "EN↑" ( P instruction) from 0 to 1. If the data in S is not in BCD, then the error flagFO0 is set to 1 and the old data of D are retained.Constant is converted to BIN automatically when store in program and can not be used as a sourceoperand of this function.Example16-bit BCD to BIN conversionLadder diagram Key operations Mnemonic codeX021P. BINEN S : WX 0D : R 1ERRORGORG X 0FUN 21PS : WX 0D : R 1X15X0↓ 1 2 3 4 ↓S WX0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 X0=B15B0↓↓D R1 0 0 0 0 0 1 0 0 1 1 1 1 0 0 1 06-38