Sigma LON Card is Applicationless and Cannot Be Reset by IC3 LON Controller

[Product_Support]

Issue

Cannot commission an IC3 LON controller in LonMaker. It has become applicationless and the red service LED is flashing or permanently lit.

Product Line

Satchwell BAS & Sigma

Environment

Satchwell Sigma IC-LON/IC3-LON

Cause

The Echelon chip may become 'locked' due to:

• Corrupted controller files
• Excessive LON network traffic (>50% bandwidth)
• Cold start or startup mode triggering a reset

Resolution

Although hardware replacement is no longer an option due to the discontinuation of the S-LON plug-in card, the following recovery steps may help restore controller functionality:

For Flashing Red LED

1. Download a clean set of controller files to the IC3 controller.
2. Launch NodeUtil.exe on a laptop with an FTT-10 Echelon adapter.
3. Connect the LON cable to the controller.
4. Press the onboard reset button on the controller.
5. Activate the service pin on the LON card; the Neuron ID should appear in NodeUtil.
6. In NodeUtil, select R to reboot the 3150 node and enter the Node ID.
7. Confirm the reset when prompted.
8. The service LED should stop flashing, indicating the controller is no longer applicationless.

⚠️ Note: If repeated resets and service pin activations fail to generate a response, and hardware replacement is not an option, the controller may no longer be recoverable. Consider isolating the device and consulting with technical support for further guidance.

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For Permanently Lit Red LED

1. Download clean controller files.
2. Repeat the NodeUtil reset procedure as above.
3. If the Echelon chip locks again, repeat the reset process.

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Alternative Recovery Procedure (Customer-Provided)

If the standard reset does not resolve the issue, the following steps have been reported to help:

1. Disconnect the IC LON from both the LON and Sigma networks.
2. Use the SCDU tool to re-node the IC LON to a temporary IP address.
3. Power off the IC LON and remove the LON daughterboard.
4. Power on the mainboard without the daughterboard, then reinstall the daughterboard.
5. Reconnect using NodeUtil and clear the LON communication buffers.
6. Verify that the red service LED is off and the green LON heartbeat LED is active.
7. Re-node the IC LON to its original IP and verify operation.

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Important Notice

The Sigma IC-LON plug-in card (S-LON) has been discontinued as of 29 December 2017 and is no longer available for replacement. All troubleshooting must be performed using existing hardware.