Mitsubishi MELSEC-Q/L User Manual

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3.6 Cautions on Programming (Operation Errors)
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.*
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*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.
DMOVK100 D12287
When D12287 is specified with the DMOV instruction,
the target devices are D12287 and D12288.
However, an operation error occurs because D12288
does not exist.
D0 D12287
K2
BMOV
This designates D12287 and D12288 as the
target devices for executing the BMOV instruction.
However, since D12288 does not exist,
an operation error occurs.
D0 D12285Z1
K2
BMOV
D0 D12287Z1 K2BMOV
K2 Z1MOV
When D12287 is specified with the BMOV instruction,
the target devices are D12287 and D12288.
However, an operation error occurs because D12288
does not exist.
An operation error occurs since head device number
is D12289 that exceeds the device range.
BMOV D0 K2D12287
When D12287 is specified with the BMOV instruction,
the target devices are D12287 and D12288.
However, an operation error occurs because D12288
does not exist.

Mitsubishi MELSEC-Q/L Specifications

General

Brand	Mitsubishi
Model	MELSEC-Q/L
Category	Controller
Language	English