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(2) When specifying the 32-bit indexing using "ZZ" specification
(a) One index register can specify 32-bit indexing using "ZZ" specification such
as "ZR0ZZ4".
The following shows the 32-bit indexing with "ZZ" specification.
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
(b) Specification method
For 32-bit indexing using "ZZ" specification, select "Use ZZ" in [Indexing
Setting for ZR Device] in the Device tab in PLC parameter setting screen.
(c) Device for which indexing can be used
Indexing can be used only for the devices shown below.
• ZR: Serial number access format file register
• D: Extended data register
• W: Extended link register
(d) Usable range of index registers
The following table shows the usable range of index registers in 32-bit
indexing with "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 of ZRm.
"ZZ"
specification*
Index registers to be used
"ZZ"
specification*
Index registers to be 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 Cannot be specified.
*: □ indicates a device name (ZR, D, W) for indexing target