Mitsubishi MELSEC Q Series Programming Manual page 104

• Specifing the 32-bit indexing using "ZZ" specification.
(a) Example of specifing the range of index registers for use of 32-bit indexing.
3-14
32-bit indexing with the "ZZ" specification is only available for the following CPU
modules. See the programming tool operating manual for the available
programming tools.
• The first five digits of the serial No. for QnU(D)(H)CPU is "10042" or higher.
(excluding Q00UJCPU)
• QnUDE(H)CPU
• LCPU
1) Each index register can be set between -2147483648 and 2147483647.
An example of indexing is shown below.
X0
DMOV K40000
X0
MOV ZR10Z0
2) Specification method
For indexing with a 32-bit index register, specify the head number of an index
register to be used on the Device tab of the Q parameter setting screen.
GX Developer 8.68R or earlier
Fig. 3.8 Setting windows for ZR device indexing setting parameter
When the head number of the index register used is changed on the Device tab of
the Q parameter setting screen, do not change the parameters only or do not write
only the parameters into the programmable controller. Be sure to write the
parameter into the programmable controller with the program.
When the parameter is forced to be written into the programmable controller, an
error of CAN'T EXE. PRG. occurs. (Error code: 2500)
Stores 40000 at Z0.
Z0
Stores the data of ZR10Z0=
D0
ZR{10+40000}=ZR40010 at D0.
Indexing
GX Deveioper 8.68W or later