Open File (Command: 1827) - Mitsubishi Electric MELSEC IQ-R series Reference Manual

Open file (command: 1827)

Open a file and lock the file so that the file contents are not modified from other devices.
The file is unlocked by any of the following.
• Close file (command: 182A)
• Restarting a module. (Resetting the CPU module, etc.)
Message format
The following shows the message format of the request data and response data of the command.
■Request data
Command Subcommand
■Response data
The file pointer No. is stored. (Page 208 File pointer No.)
Data specified by request data
■Command
ASCII code
1 8 2 7
31 38 32 37
H H H H
■Sub command
Item
For MELSEC-Q series
For MELSEC-L series
For MELSEC iQ-R series
■Password
Specify the password of the access target file. (Page 195 Password)
■Open mode
Specify whether the specified file is open for reading or for writing. (Page 210 Open mode)
• Open for read: 0000H
• Open for write: 0100H
12 FILE CONTROL
236
12.6 File Modification
Password Open mode Drive No.
Binary code
27 18
H H
ASCII code
0 0 0 0
30 30 30 30
H H H H
0 0 0 4
30 30 30 34
H H H H
0 0 4 0
30 30 34 30
H H H H
Number of file
File name
name characters
Binary code
00 00
H H
04 00
H H
40 00
H H