349
Symbol Math Instructions Section 3-10
Flags
Precautions If Au or Ad is not BCD, an error is generated and the Error Flag will turn ON.
If as a result of the addition, the content of R is 0000 hex, the Equals Flag will
turn ON.
If an addition results in a carry, the Carry Flag will turn ON.
Note To clear the Carry Flay (CY), execute the Clear Carry (CLC(041)) instruction.
Examples When CIO 0.00 is ON in the following example, D100, D200, and CY will be
added as 4-digit BCD values, and the result will be output to D300.
3-10-8 DOUBLE BCD ADD WITH CARRY: +BCL(407)
Purpose Adds 8-digit (double-word) BCD data and/or constants with the Carry Flag
(CY).
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Name Label Operation
Error Flag ER ON when Au is not BCD.
ON when Ad is not BCD.
OFF in all other cases.
Equals Flag = ON when the result is 0.
OFF in all other cases.
Carry Flag CY ON when the addition results in a carry.
OFF in all other cases.
0.00
D100
D200
D300
+BCL(407)
R
Au
Ad
Au: 1st augend word
Ad: 1st addend word
R: 1st result word
Variations Executed Each Cycle for ON Condition +BCL(407)
Executed Once for Upward Differentiation @+BCL(407)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area Au Ad R
CIO Area CIO 0 to CIO 6142
Work Area W0 to W510
Holding Bit Area H0 to H510
Auxiliary Bit Area A0 to A958 A448 to A958
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