Red Error LED on the Back of My NHR 4600 and I Cannot Communicate With It

Updated Oct 17, 2024

Issue Details

I'm not able to communicate with my NHR 4600 and I noticed that the Error LED on the back side is on with a red light.  I was able to communicate with the unit in the past and have not used it in a while.

Loading the NHR 4600 software onto another computer also shows the same behavior.

Solution

This type of behavior will happen if the connection settings to the NHR 4600 have changed or if NHR 4600 has not been configured initially.  To resolve this error, you can follow the hardware configuration instructions below:

 

PC Setup
1. Open Windows Control Panel.

2. Open Network Connections.

3. Select and right click the Local Area Connection that is connected to the load and choose Properties (disable any other ports temporarily).

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4. Select the Internet Protocol and click Properties.

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5. Select “Use the following IP address” and type in the address as indicated above then click OK. This IP address must match the load’s IP address range; refer to the sticker on the back of the load to obtain this information.

 

Software Setup
1. Launch the Port Configurator (Start > ALL Programs > NH Research > Port Configurator).

2. Verify that the Ethernet is listed under Port Configuration window; if Ethernet is not listed click “New” and select Ethernet then click OK.

3. If checked, uncheck the “Online” check box.

4. Check the “Trigger Master” check box when Ethernet is selected in the list.

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5. Click OK to close Port Configurator.

6. Reboot the PC if prompted.

7. Launch System Configurator (Start > ALL Programs > NH Research > System Configurator).

8. Click File > New.

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9. Click File > Save As.

10. Type in a proper name for this configuration and click Save.

11. Select this file as the default Configuration.

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12. Click OK to close the System Configurator.

13. Verify that the PC is connected to the load and load is powered up and ready. If there is more than one load in the system turn ON the power to the Auxiliary loads first and then turn ON the power to the Master.

14. Launch Port Configurator.

15. Check the “Online” check box.

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16. Click OK to close the Port Configurator.

17. Launch the System Configurator.

18. Click Autofill > Setup.

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19. Select and double click on “EthernethHost Port”.

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20. With the load connected to the PC and powered click Autofill > Search for Devices.

21. Wait for the search process to complete; you will be prompted with the number of devices found.

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22. Click OK to the following screens.

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23. Select the baud rate that the load is set to. This information can be found on a label on the back of the Load.

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24. Click OK to the following screens.

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25. At the completion you will see one or more loads that match your system.

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26. Click OK to close the System Configurator.

27. Launch the AC Load Panel and verify communication; i.e. enable the Metering.