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Reprogram Firmware
If needed, the SD card terminal can be used to reprogram the firmware of the VFD for software upgrades or
custom features. DXL and LHX drives have two Digital Signal Processors (DSPs) that contain the firmware to
control the system which will both require reprogramming. Firmware files will have a suffix of “DRV” for Drive
Control or “INT” for Interface Control.
The firmware version of Phase Technologies drives can be found by pressing ENTER on the home screen
and then scrolling up or down to 3 READ MEASURED VALUES and pressing ENTER. Under 3 READ
MEASURED VALUES, there will be a heading called 3.18 MODEL NUMBER, which will show the VFD model
and current firmware versions
To reprogram a DXL or LHX:
1. From the HOME screen, press ENTER, then scroll down to 12 FILE SYSTEM and press ENTER.
2. Use the up and down arrows to select 12.3 REPROGRAM FIRMWARE on the display and press
ENTER.
3. Use the up and down arrows to select the “DRV” firmware file for reprogramming and press ENTER.
4. If the file chosen contains the proper firmware for the VFD model, reprogramming will begin.
Reprogramming firmware will take several minutes. If the LEDs, labeled TX and RX, on the INTF
board are flashing, that means that the reprogramming process is underway.
5. If the reprogram is successful, the display will show SUCCESSFUL, PRESS ENTER TO RESET.
6. If the display shows UNSUCCESSFUL, cycle power and retry steps 1 – 5.
7. Press ENTER and the drive will reboot with the new software version.
8. Repeat the steps above, this time choosing the “INFT” firmware file.
The firmware versions for both “DRV” and “INTF” can be verified by going to 3 READ MEASURED VALUES.
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