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434 Legrand PDU User Guide
b. Then shows the happy smiley when the firmware upgrade completes successfully. See
Firmware
Upgrade via USB
(on page 441).
6. After the happy smiley appears, press one of the control buttons next to the display for one second until
the smiley disappears.
Tip: You can remove the USB drive and plug it into another Legrand PDU device for performing the
same task(s) once the happy smiley or the firmware upgrade message displays.
7. Wait for several seconds until the Legrand PDU resumes normal operation, indicated by the normal
message of the display.
If nothing is shown on the display and no task is performed after plugging the USB drive, check the log file in
the USB drive.
System and USB Requirements
You must satisfy ALL of the following requirements prior to using a USB flash drive to perform device
configuration and/or firmware upgrade.
Legrand PDU system requirements:
There is at least one USB-A port available on your Legrand device.
Your Legrand PDU must run firmware version 3.4.11 or later.
Note that the Legrand PDU interpreted the USB drive's contents using the firmware which was running
when plugging the USB drive, not the new firmware after firmware upgrade.
USB drive requirements:
The drive contains either a single partition formatted as a Windows FAT32 filesystem, or NO partition
tables (that is, a superfloppy-formatted drive).
The drive contains a configuration file called
fwupdate.cfg
in its root directory. See
fwupdate.cfg
(on
page 434).
Configuration Files
There are three types of configuration files.
fwupdate.cfg:
This file MUST be always present for performing configuration or firmware upgrade tasks. See
fwupdate.cfg
(on page 434).
config.txt:
This file is used for configuring device settings. See
config.txt
(on page 437).
devices.csv:
This file is required only when there are device-specific settings to configure for multiple Legrand PDUs.
See
devices.csv
(on page 439).
Legrand provides a Mass Deployment Utility, which helps you to quickly generate all configuration files for
your Legrand PDU. See
Creating Configuration Files via Mass Deployment Utility
(on page 439).