When using external storage, check the restrictions identified below.
5.6.3 Restrictions on External Storage Usage
Screen capture processing time and file size depends on the image quality and screen size.
File size for a screen quality of 80 will be around 200 KB and the screen capture will take about 5 to 6 seconds.
The screen display (Parts, screen change, etc.) will not update during a screen capture.
When you use [Auto Increment File Number] but don't use [Auto File Delete] or [Loop], you may run out of space in the external storage device or reach the maximum number of files (65535). In this case, the screen capture will not work even if the bit 0 of [Control Address] is set.
If you capture a screen with the Blink option, the captured image is displayed with no blink.
If you create a file other than a screen capture while external storage is attached to the display unit and when [Auto Increment File Number] is set, the file is overwritten by subsequent screen captures.
Even when you set [Auto File Delete] or [Loop], the screen cannot be captured if existing files are deleted or cannot be overwritten. It will cause write errors (for example, files are open or read-only).
When you use [Auto Delete File], it may take longer time to delete if you have more files. It may take anywhere from a few seconds to a few minutes since all the files are deleted.
When saving to the FTP Server, the automatic file number computation function is not available. A folder (\CAPTURE) will be created in the root directory for logging in. The file name will be saved as timestamp (year/month/day/hour/minute/second) when the save operation begins.
The FTP Server timeout is 75 seconds. An error will occur if a connection to the FTP Server does not occur within the timeout period.