Filewritevar - Omron NJ501-1500 Reference Manual

2 Instruction Descriptions

FileWriteVar

The FileWriteVar instruction writes the value of a variable to the specified file in the SD Memory Card.
The value is written in binary format.
Instruction
FileWriteVar Write Variable to
File
Variables
Name Meaning
FileName File name
WriteVar Variable
OverWrite Overwrite
enable
* If you omit the input parameter, the default value is not applied. A building error will occur.
Bit strings
FileName
OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
WriteVar
An enumeration, array, array element, structure, or structure member can also be specified.
OverWrite OK
Function
The FileWriteVar instruction writes the value of variable WriteVar to the file specified by FileName in the
SD Memory Card. The value is written in binary format. You can specify an enumeration, array, array
element, structure, or structure member for WriteVar.
If a file with the name FileName does not exist on the SD Memory Card, it is created. FileName
includes the path. If a specified directory does not exist in the SD Memory Card, it is created.
If a file with the name FileName already exists in the SD Memory Card, the following processing is per-
formed depending on the value of overwrite enable OverWrite.
Value of OverWrite
TRUE (Enable overwrite.)
FALSE (Prohibit overwrite.)
2-794
Name FB/FUN
FB
I/O Description
Name of file to which to
write variable
Variable to write
Input
TRUE: Enable overwrite.
FALSE: Prohibit overwrite.
The existing file is overwritten.
The file is not overwritten and an error occurs.
Graphic expression
FileWriteVar_instance
FileWriteVar
Execute Done
FileName Busy
WriteVar Error
OverWrite ErrorID
Valid range
Depends on data type.
Integers
Processing
NJ-series Instructions Reference Manual (W502)
ST expression
FileWriteVar_instance(Execute,
FileName, WriteVar, OverWrite,
Done, Busy, Error, ErrorID);
Unit Default
''
*
---
FALSE
Times, durations,
dates, and text strings
OK