NAK: Target Unsupported" error message appears when attempting to upgrade an ION meter firmware with ION Setup.

Product Line:

ION 7300

Environment:

ION Setup

Cause:

This error can occur for the following reasons:

• Attempting to upgrade Ethernet firmware on an ION7300 series meter while connected via serial communications.
• Ethernet firmware upgrades on Ethernet‑capable meters must be performed over Ethernet, not over the serial port.
• A firmware and hardware revision mismatch, such as:
• Attempting to upgrade a revision A ION7300 meter (firmware versions 102–213) using revision B firmware (versions 250–285).
• Attempting to upgrade a 7550 RTU meter from firmware revision 373 to revision 400.
• These firmware versions are intended for different hardware revisions, and upgrading between them is not supported.
• Firmware release notes describe the specific hardware differences.

Resolution:

Warning: Before downloading or installing any firmware updates, verify that the firmware iscompatible with the exact meter model and hardware revision. If unsure, contact Technical Support for guidance.

Warning:
Disconnect the device from all monitoring software before performing a firmware upgrade.

To resolve the issue:

1. When upgrading firmware on an Ethernet‑capable ION7300 series meter, ensure the upgrade is performed using Ethernet communications, not serial.
2. Verify that the firmware version matches the hardware revision of the meter.
• Revision A firmware cannot be used on Revision B meters, and vice versa.
3. Confirm compatibility using the firmware release notes before proceeding.
4. Retry the firmware upgrade using the correct communication method and compatible firmware.

Note: ION 7300 series is currently Discontinued, for more information about replacement and others follow the link: Replacement path for old ION meters

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