6F3B0253
7. Instructions
FUN 032
D−
Double-word subtraction
Expression
Input − [ A+1⋅A D− B+1⋅B → C+1⋅C ]− Output
Function
When the input is ON, the
If the result is greater than 2147483647, the upper limit value 2147483647 is stored in C+1⋅C, and the output is turned ON. If the result is smaller than
Execution condition
Input | Operation | Output |
OFF | No execution | OFF |
ON | Execution (normal) | OFF |
| Execution (overflow or underflow occurred) | ON |
Operand
| Name |
|
| 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 | Minuend |
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| √ | √ |
| √ | √ |
| √ | √ | √ |
|
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| √ |
|
B | Subtrahend |
|
|
|
|
|
| √ | √ |
| √ | √ |
| √ | √ | √ |
|
|
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| √ |
|
C | Difference |
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|
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|
|
|
|
| √ |
| √ | √ | √ | √ | √ |
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|
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|
Example
When R005 is ON, the
If the data of D0101⋅D0100 is 1580000 and the data of RW25⋅RW24 is 80000, the result 1500000 is stored in D0103⋅D0102, and R010 is turned OFF. (No overflow/underflow)
D0101⋅D0100
RW25⋅RW24
1580000
−
D0103⋅D0102
80000 
1500000
R010 is OFF
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