3 extended add (addx (++)), 1 ) operation, 2 ) format – Yaskawa MP900 Series Ladder Programming Manual User Manual
Page 95
5.3 Numeric Operation Instructions
5.3.3 Extended Add (ADDX (++))
5-26
5.3.3 Extended Add (ADDX (++))
( 1 ) Operation
Input data A and input data B are added and the result is stored in the output data.
Overflows are not treated as operation errors. Operation continues from the maximum value in the negative direction.
Underflows are not treated as operation errors. Operation continues from the maximum value in the positive direction.
Output Data Behavior
In the example shown above, the output data is integer data. With double-length integers, adding 1 to
2,147,483,647 (7FFFFFFF hex) results in -2,147,483,648 (80000000 hex).
Unlike operations for the ADD, SUB, or EXPRESSION instructions, overflows and underflows do not occur.
( 2 ) Format
∗ C and # registers cannot be used.
Input data A
Output data
Input data B
Extended Add
++
Output data (See notes.)
0
32,767 (7FFF hex)
−32,768 (8000 hex)
+1
32,767
-32,768
+1
Input data B
Output data
Input data A
Icon:
Key entry: ++
Parameter Name
Applicable Data Types
B
W
L
F
A
Index
Constant
Input data A (SrcA)
×
{
{
×
×
{
{
Input data B (SrcB)
×
{
{
×
×
{
{
Output data (Dest)
×
{
*
{
*
×
×
{
×