256
(3) When using 32-bit index modification
For the file register (ZR), extended data register (D), extended link register (W) using the serial number access
method, 32-bit index modification using two points of the index register is available.
The following two kinds of methods can be used to specify the index register.
• Specify the range used for 32-bit index modification.
• Specify the 32-bit index modification using "ZZ".
For details on specification of the index register, refer to the following.
MELSEC-Q/L Programming Manual (Common Instruction)
5.5.2 Standard device register (Z)
By using the index register between register operations, operations can be executed at a higher speed. The index
register used in this case is called the standard device resister.
MELSEC-Q/L Programming Manual (Common Instruction)
(1) Device number
Since the standard device register is the same device as the index register, pay attention not to use the same
device number when using the index modification.
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