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7.8 Buffer Memory Access Instructions
7.8.1 Reading 1-/2-word data from intelligent function module
FROM, DFRO
DFRO(P)
(1) Reads the data in (n3 2) words from the buffer memory address specified for n2 of the
intelligent function module specified for n1, and stores the data to the device specified for
and the following devices.
Data read from intelligent function modules is also possible with the use of
intelligent function module devices.
For intelligent function module devices, refer to the following manual.
• QCPU User's Manual (Functions Explanation, Program Fundamentals)
O
peration Error
In any of the following cases, an operation error occurs, the error flag (SM0) is turned ON, and
the corresponding error code is stored to SD0.
• There has been no exchange of signals with the intelligent function module at the
execution of the instruction.
(Error code: 1412)
• An error has been detected in the intelligent function module at the execution of the
instruction.
(Error code: 1402)
• The I/O number specified for n1 is not for the intelligent function module.
(Error code: 2110)
• The range of n3 points (2 n3 words for the DFRO(P) instruction) from the device
specified for
exceeds the specified device range.
(Error code: 4101)
• The address specified for n2 is outside the buffer memory range.
(Error code: 4101)
• The address specified for n2 is an odd numbered address. (AJ71QC24(N))
(Error code: 4100)
• The number of read data exceeds 6144/3072. (A/QnA module only)
(Error code: 4101)
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Summary of Contents for MELSEC Q Series
Page 1: ...Structured Programming Manual Mitsubishi Programmable Controller QCPU Common Instructions ...
Page 2: ......
Page 14: ...A 12 MEMO ...
Page 340: ...6 178 MEMO MTR ...
Page 708: ...7 368 MEMO ...
Page 776: ...8 68 MEMO ...
Page 796: ...9 20 MEMO ...
Page 804: ...App 8 MEMO ...
Page 812: ...Index 8 MEMO ...
Page 815: ......