Mitsubishi Electric MELSEC Q Series Structured Programming Manual page 72

(b) Specifying a 32-bit index setting using 'ZZ'
'ZZ'
4.6 Index Setting
4-48
1) A 32-bit index can be specified to the index register by specifying an index
using 'ZZ', for instance, 'ZR0ZZ4'.
The following figure shows the 32-bit index setting using 'ZZ'.
M0
K100000
M0
K100
2) Specification method
When specifying a 32-bit index setting using 'ZZ', select "Use ZZ" in the
"Indexing Setting for ZR Device" setting in the <<Device>> tab of the PLC
parameter.
Figure 4.6-4 Index setting for ZR device on the parameter setting screen
3) Devices that can be used for the index setting
Only the following devices can be used for the index setting.
Device
ZR
D
W
4) Usage range of index registers
The following table shows the usage range of index registers when specifying
32-bit index setting using 'ZZ'.
When specifying a 32-bit index setting using 'ZZ', specify a device as a form of
ZRmZZn.
The device number of ZRm is indexed with 32 bits (Zn, Zn+1) by specifying
ZRmZZn.
*2
Index register
ZZ0
ZZ1
ZZ2
ZZ3
ZZ4
ZZ5
ZZ6
ZZ7
ZZ8
ZZ9
*4: Indicates the device name (ZR, D, W) to be indexed
DMOVP
EN ENO
s d Z4
MOVP
EN ENO
s d ZR0ZZ4
Description
Serial number access file register
Extended data register
Extended link register
Z0, Z1
Z1, Z2
Z2, Z3
Z3, Z4
Z4, Z5
Z5, Z6
Z6, Z7
Z7, Z8
Z8, Z9
Z9, Z10
Set 100000 to Z4 and Z5.
Set 32-bit (Z4, Z5) index to ZR.
ZR(0+100000) indicates ZR100000.
*4
Index register
'ZZ'
ZZ10
ZZ11
ZZ12
ZZ13
ZZ14
ZZ15
ZZ16
ZZ17
ZZ18
Not applicable
ZZ19
Z10, Z11
Z11, Z12
Z12, Z13
Z13, Z14
Z14, Z15
Z15, Z16
Z16, Z17
Z17, Z18
Z18, Z19