Deltech SPX DES Series Instruction Manual page 9

These values will be written every 10 seconds to a comma
separated value file stored in the root folder of the USB flash drive.
Each day a new comma separated value file will be created for
storing the samples for that day. Comma separated value files
older than 60 days will be automatically deleted.
2. USB Event History
When a USB flash drive is installed in the controller it will begin
to automatically log all dryer events: power loss, power recovery,
alarms, state (standby/running), and mode (manual/scheduled/
remote).
Events are timestamped and recorded in the EVENT.TXT file
stored in the root folder of the USB flash drive.
3. USB Bootloader
Firmware updates for the EMM connect can be performed via the
USB flash drive. In order to perform a firmware update; place the
image.hex and lang.hex files provided by SPX in the root folder
of a USB thumb drive.
With the dryer controller powered off install the USB flash drive
in the USB host port on the EMM connect. Then while holding
the enter button on the front panel apply power to the controller.
Once the power LED begins blinking rapidly you can release
the enter button. The controller will reboot when the update is
complete. On startup the current firmware version will be shown
on the text display.
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