Files - Mitsubishi Electric Q01UCPU User Manual

2.1.3

Files

The files written to the CPU module have information such as a file name, file size, and written date. These information
can be checked on the window displayed by selecting [Read from PLC] from the menu of a programming tool.
[Online]
Item
• File name structure and file specification
Each file name is composed of a name (up to 8 characters in one byte/4 characters in double bytes) and an
extension (3 characters in one byte). Create a file name with upper-case characters only. An extension is
automatically appended according to the type set when the file was created.
• Characters that cannot be used for a file name
The following reserved words for Microsoft
File name
COM1 to COM9, PRN, LPT1 to LPT9, NULL, AUX, CLOCK$, CON
• How to specify a file name in the sequence program
Since the sequence program is not case-sensitive in one-byte characters, the file can be named by both upper-case
and lower-case characters. (Both "ABC" and "abc" are treated as "ABC".)
In double-byte characters, an upper-case character and lower-case character are distinguished. Name a file by an
upper-case character. ("ABC" and "abc" are distinguished.)
The date and time when a file was written to the CPU module is shown. The date and time are based on the clock set
Last Change
on the programming tool (personal computer) side.
The size of a file when it was written from a programming tool to the CPU module is shown in units of bytes. To display
Size the latest data, click the
created by a user except a file register file. (
[Read from PLC...]
®
Windows
button. At least 64 bytes (136 bytes for a program) are added to the file
Page 45, Section 2.1.3 (2))
CHAPTER 2 APPLICATION OF PROGRAMMING
Description
®
cannot be used as a file name.
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