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3 CONFIGURATION OF INSTRUCTIONS
3.6 Cautions on Programming (Operation Errors)
■Instructions for a block of devices, including BMOV and FMOV
• 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 12K 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.
• 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,
when 12K 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. An error occurs when the head device number of the devices
with indexing exceeds the device range.
With changing the settings of the PLC parameter, the device range is not checked.
*1
*1 For the method that the device range check is disabled when the index modification is specified, refer to the User's Manual (Function
Explanation, Program Fundamentals) for the CPU module used.
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.
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.
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.
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