Mitsubishi Electric MELSEC Q Series Structured Programming Manual page 73

5) The following figure shows the examples of 32-bit index setting using 'ZZ' and
their actual processing devices.
(With the setting of Z0 (32 bits) =100000 and Z2 (32 bits)=-20)
Ladder example
X0
DMOV
EN ENO
K100000
s
DMOV
EN ENO
K-20
s
X1
MOV
EN ENO
ZR1000ZZ0
s
Figure 4.6-5 Ladder examples and actual processing devices
6) Functions that can use 'ZZ'
32-bit index settings using 'ZZ' can be used in the following functions.
No.
1
Device specification with an instruction in a program
2 Monitoring device registrations
3
Device test
4
Device test with an execution condition
5 Setting monitoring conditions
Sampling trace (trace point (device specification), trace target
6
devices)
Data logging function (sampling interval (device specification),
7
logging target data)
ZZn cannot be used individually such as 'DMOV K100000 ZZ0'. When setting a
value to index registers to specify a 32-bit index setting using 'ZZ', set a value to
Zn (Z0 to Z19).
ZZn cannot be entered individually in the functions.
(c) 32-bit index setting for FXCPU
Combine index registers V (from V0) and Z (from Z0) for a 32-bit index setting.
V is used for high order and Z is used for low order. With the combination of the
specified Z and the corresponding V, the device can be used as a 32-bit register.
Note that the index setting is not applied by specifying the high order V.
Example: When specifying Z4, V4 and Z4 are used as a 32-bit register.
Setting value
Z0
Z1
Z2
Z3
Z4
Z5
Z6
Z7
Z0
d
Description
Z2
d
D13000Z2
d
Description
Index register
V0, Z0
V1, Z1
V2, Z2
V3, Z3
V4, Z4
V5, Z5
V6, Z6
V7, Z7
Actual processing device
X1
MOV
EN ENO
ZR101000 s d D12980
ZR1000Z0 ZR(1000+100000) ZR101000
D13000Z2 D(30-20) D12980
4.6 Index Setting
4
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