Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 190)

5.7 Data Shift Instructions
5.7.5 Exchange (XCHG)
5-121
Instructions
5
( 3 ) Programming Example
In the following programming example, four words of data are exchanged between table 1, which starts at MW00010,
and table 2, which starts at MW00020.
The XCHG instruction is executed when switch 1 (DB000000) turns ON.
The following table illustrates how the data is exchanged between table 1 and table 2.
Table 1 Table 2
Register
Data before
Execution of
Instruction
Data after
Execution of
Instruction
Register
Data before
Execution of
Instruction
Data after
Execution of
Instruction
MW00010 10 123 MW00020 123 10
MW00011 20 234 ⇔ MW00021 234 20
MW00012 30 345 MW00022 345 30
MW00013 40 456 MW00023 456 40