6F3B0253
7. Instructions
FUN 035
+C
Addition with carry
Expression
Input − [ A +C B → C ]− Output
Function
When the input is ON, the data of A, B and the carry flag (CF = S050) are added, and the result is stored in C. If carry is occurred in the operation, the carry flag is set to ON. If the result is greater than 32767 or smaller than
This instruction is used to perform unsigned addition or
Execution condition
Input |
| Operation | Output | CF | |
OFF | No execution |
| OFF | − | |
ON | Execution | Normal | No carry | OFF | Reset |
|
|
| Carry occurred | OFF | Set |
|
| Overflow / | No carry | ON | Reset |
|
| underflow | Carry occurred | ON | Set |
Operand
| Name |
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| Device |
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| Register |
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| Constant | Index | ||
|
| X | Y | R | S | T. | C. | XW | YW | RW | SW | T | C | D | I |
| J | K |
|
| |||
A | Augend |
|
|
|
|
|
| √ | √ |
| √ | √ |
| √ | √ | √ | √ | √ | √ |
| √ | √ |
|
B | Addend |
|
|
|
|
|
| √ | √ |
| √ | √ |
| √ | √ | √ | √ | √ | √ |
| √ | √ |
|
C | Sum |
|
|
|
|
|
|
|
| √ |
| √ | √ | √ | √ | √ | √ | √ | √ |
|
| √ |
|
Example
When R013 is ON, the data of
If the data of D0101⋅D0100 is 12345678 and RW21⋅RW20 is 54322, the result 12400000 is stored in D0201⋅D0200.
D0101⋅D0100
RW21⋅RW20
12345678
+
D0201⋅D0200
54322
12400000
Basic Hardware and Function 149
