Keithley 2657A User Manual

Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012 7-105
Usage
fileVar = io.input()
fileVar = io.input(newfile)
fileVar
The descriptor of the input file or an error message (if the function fails)
newfile
A string representing the path of a file to open as the default input file, or the
file descriptor of an open file to use as the default input file
Details
The newfile path may be absolute or relative to the current working directory.
When using this function from a remote TSP-Link
®
node, this command does not accept a file descriptor and
does not return a value.
If the function fails, an error message is returned.
Also see
io.open() (on page 7-105)
io.output()
(on page 7-106)
io.open()
This function opens a file for later reference.
Type TSP-Link accessible
Affected by Where saved Default value
Function No
Usage
fileVar, errorMsg = io.open(path)
fileVar, errorMsg = io.open(path, mode)
fileVar
The descriptor of the opened file
errorMsg
Indicates whether an error was encountered while processing the
function
path
The path of the file to open
mode
A string representing the intended access mode ("r" = read,
"w" = write, and "a" = append)
Details
The path to the file to open may be absolute or relative to the current working directory. If you successfully open
the file, errorMsg is nil and fileVar has the descriptor that can be used to access the file.
If an error is encountered, the command returns nil for fileVar and an error string.
Example
testFile, testError = io.open("testfile.txt", "w")
if testError == nil then
testFile:write("This is my test file")
io.close(testFile)
end
Opens file testfile.txt for
writing. If no errors were found
while opening, writes "This is
my test file" and closes the
file.
Also see
io.close() (on page 7-103)

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English