Mitsubishi Electric MELSEC-Q/L Programming Manual page 784

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■When writing binary data

• If the extension of the target file is omitted, ".BIN" is used as an extension.

• When the designated file does not exist, a new file is created and the data is saved from the beginning of the file. The

attributes of this new file are set using the archive attributes.

• When the designated file exists, the data is saved from the beginning of the file. When the size of the data exceeds that of

the existing area in the file during the writing, the excess data is added/saved.

• If the file position specified is greater than the existing file size:

• The High Performance model QCPU of which the first five digits of the serial number are "01111" or lower results in an error.

• The High Performance model QCPU/Process CPU/Redundant CPU/Universal model QCPU/LCPU of which the first five digits of the serial number are

"01112" or higher performs writing at point 0 and is completed normally.

• An error occurs when the saving space becomes full while data is added and saved. In such a case, the data that is

successfully added/saved remains in the medium. The error completion is indicated after as much data as possible is

added/saved.

The following shows the method for writing binary data when No. of request write data and file position are specified.

Control data

7 APPLICATION INSTRUCTIONS

7.19 Other Instructions

Execution/completion type

Writing result (No. of written data)

Head position of the file to be written

No. of columns designation

Data type specification

File data (in byte unites)