Mitsubishi Electric MELSEC-Q/L - Page 99

3 CONFIGURATION OF INSTRUCTIONS
3.3 Indexing
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■Example of specifying 32-bit indexing with "ZZ" specification
One index register can specify 32-bit indexing by using "ZZ" specification such as "ZR0ZZ4".
The 32-bit indexing with "ZZ" specification is as follows.
• Specification method
To perform 32-bit indexing by using "ZZ" specification, select "Use of ZZ" in "Indexing Setting for ZR Device" in PC parameter.
• Device that indexing can be used
The following device is available for indexing.
*1 This device can be used only for the High-speed Universal model QCPU.
• Usable range of index registers
The following table shows the usable range of index registers in 32-bit indexing used "ZZ" specification.
The 32-bit indexing with "ZZ" specification is specified as the format ZRmZZn.
Specifying ZRmZZn enables Zn and Zn+1 of 32-bit values to index the device number, ZRm.
*2  refers to device name (ZR, D, W) for indexing target.
Device Description
ZR Serial number access format file register
D Extended data register (D)
W Extended link register (W)
M
*1
Internal relay
B
*1
Link relay
D
*1
Data register
W
*1
Link register
Jn\B
*1
Link relay
Jn\W
*1
Link register
"ZZ" specification
*2
Index registers used "ZZ" specification
*2
Index registers used
ZZ0 Z0, Z1 ZZ10 Z10, Z11
ZZ1 Z1, Z2 ZZ11 Z11, Z12
ZZ2 Z2, Z3 ZZ12 Z12, Z13
ZZ3 Z3, Z4 ZZ13 Z13, Z14
ZZ4 Z4, Z5 ZZ14 Z14, Z15
ZZ5 Z5, Z6 ZZ15 Z15, Z16
ZZ6 Z6, Z7 ZZ16 Z16, Z17
ZZ7 Z7, Z8 ZZ17 Z17, Z18
ZZ8 Z8, Z9 ZZ18 Z18, Z19
ZZ9 Z9, Z10 ZZ19 Unusable
M0
MOVP K100
DMOVP K100000 Z4
ZR0ZZ4
M0
Stores 100000 at Z4 and Z5.
Indexing ZR device with 32-bit
index registers (Z4 and Z5)
ZR (0+100000) =ZR100000