Mitsubishi MELSEC-Q/L, Programming Manual

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3.6
C
autions on
Progra
mming (
O
p
eration Err
ors)
2) Universal model QCPU and LCPU
The device range is checked. When the device number is outside the device range, an operation error occurs.
For example, when12 k points are assigned to a data register, an error occurs if the device number of the data
register exceeds D12287.
The device range is checked even though indexing is executed.
With changing the settings of the PLC parameter, the device range is not checked.*
2
*2: For changing the settings of the PLC parameter on GX Developer, refer to the following manual.
• QCPU User's Manual (Function Explanation, Program Fundamentals)
(b) Instructions for a block of devices, including BMOV and FMOV
1) For the Basic Model QCPU, High Performance model QCPU, Process CPU, and Redundant CPU
The device range is checked.
When the device number is outside the device range, an operation error occurs.
For example, when 12 k points are assigned to a data register, an error occurs if the device number of the data
register exceeds D12287.
Device range checks are also conducted when indexing is performed.
However, if indexing has been conducted, there will be no error returned if the initial device number exceeds the
relevant device range.
2) Universal model QCPU and LCPU
The device range is checked.
When the device number is outside the device range, an operation error occurs.
For example, when12 k points are assigned to a data register, an error occurs if the device number of the data
register exceeds D12287.
DMO V K 100 D122 87
W hen D122 87 is specifie d with the DMO V instructi o n ,
the tar g et d e v ices are D122 87 an d D122 88.
H o we v er , an o perati o n err o r o ccurs because D122 88
do es n o t exist.
D0 D122 87 K 2 BMO V
This d esi g nates D122 87 an d D122 88 as the
tar g et d e v ices f o r executin g the BMO V instructi o n.
H o we v er , since D122 88 do es n o t exist ,
an o perati o n err o r o ccurs.
D0 D122 85 Z1 K2 BMO V
D0 D122 87 Z1 K2 BMO V
K2 Z1 MO V
W hen D122 87 i s spec i f i e d w i th the BMO V i nstruct io n ,
the tar g et d e vi ces are D122 87 an d D122 88 .
Ho we v er , an o perat io n err o r o ccurs because D122 88
do es n o t ex i st .
A n o perat io n err o r o ccurs s i nce hea d d e vi ce number
i s D122 8 9 that excee d s the d e vi ce ran g e .
BMO V D0 K 2 D122 87
W hen D122 87 is specifie d with the BMO V instructi o n ,
the tar g et d e v ices are D122 87 an d D122 88.
H o we v er , an o perati o n err o r o ccurs because D122 88
do es n o t exist.