440
Symbol Math Instructions Section 3-11
Description +BCL(407) adds the BCD values in Au and Au+1, Ad and Ad+1, and CY and
outputs the result to R, R+1.
Flags
Precautions If Au, Au +1 or Ad, Ad +1 are not BCD, an error is generated and the Error
Flag will turn ON.
If as a result of the addition, the content of R, R +1 is 00000000 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 000000 is ON in the following example, D00101, D00100, D00111,
D00110, and CY will be added as 8-digit BCD values, and the result will be
output to D00121 and D00120.
3-11-9 SIGNED BINARY SUBTRACT WITHOUT CARRY: –(410)
Purpose Subtracts 4-digit (single-word) hexadecimal data and/or constants.
Ladder Symbol
Variations
R+1
CY
+
RCY
(BCD)
(BCD)
(BCD)
Au +1
Ad+1
Au
Ad
CY will turn
ON when there
is a carr
.
Name Label Operation
Error Flag ER ON when Au, Au +1 is not BCD.
ON when Ad, Ad +1 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.
−(410)
R
Mi
Su
Mi: Minuend word
Su: Subtrahend word
R: Result word
Variations Executed Each Cycle for ON Condition –(410)
Executed Once for Upward Differentiation @–(410)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
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