OFF LINE is generally caused by either:
- The GRIDlink is unable to communicate through the Internet with the Utility’s VTN (Virtual Top Node) all together or it is making a connection but unable to parse the Open ADR payload.
- A network failure to communicate through the Internet with the Utility’s VTN
CASE 1 – GRIDlink OFF LINE (with the Utility’s Server VTN ) and ON LINE with GRIDview
The Utility’s VTN server connection that is the problem. This could be caused from:
- A change in the file within the GRIDlink that holds the user name & password to the VTN.
- The VTN has changed it’s SSL security file which will require a change in the GRIDlink to reconnect.
- If late at night or a weekend, it is possible there is maintenance being done on the server.
- In extremely rare cases a reboot might be required from GRIDview or power cycle locally.
- The VTN is using a white list to block unwanted connections and the GRIDlink has not been added to the list.
- It is also possible that the local area network is using a special DNS Server which is not resolving the VTN’s URL to an IP address but allowing GRIDview’s URL to resolve.
CASE 2 – GRIDlink OFF LINE (with the Utility’s Server VTN ) and OFF LINE with GRIDview
- Wired to local network
This is the network, router settings or your Internet connection.
- Check the GRIDlink and see that the PWR 100 ACT LED are all illuminated. If 100 ACT is OFF then check your cable and physical connection.
- If the GRIDlink is set up for DHCP and was powered ON for some time without a network connection to the DHCP server, it might need to be power cycled. This is not uncommon that if the GRIDlink was powered some time before connecting the Ethernet cable, it failed to get an IP Address. This would be indicated by the Power LED blinking which should be solid. Note all settings are stored in non-volatile RAM so no settings will be lost.
- If the GRIDlink was given a Static IP. perhaps the information was entered incorrectly through the Tool Kit or the IP to MAC Address binding in the network Router does not agree with the GRIDlink’s configured network settings. This would be indicated by the Power LED blinking as well. Re-check all settings.
- If the GRIDlink is using DHCP and router assigned an IP address which is paired to the MAC address (called IP to MAC Address resolution). Check for changes in the router.
- If the local area network connection is OK, you should test to make sure there is an Internet connection. This can be done by plugging a laptop into the same cable used by the GRIDlink. Open a Command (CMD) screen and enter: ping 18.104.22.168 or other known Internet IP.
- It is also possible that the local area network is using a special DNS Server which is not resolving the VTN’s URL and GRIDview’s URL to an IP address
4 replies without packet loss indicates a good Internet connection as shown here, otherwise contact the IT Manager.
- If you are using a Red Lion cell router, check the WAN light to make sure there is a connection to the tower. This should be ON. See figure below.
- Make sure the router is provisioned though your cell carrier.
- Check the GRIDlink and see that the PWR 100 ACT LED are all illuminated. If 100 ACT is OFF then check your cable and physical connection to the cell router.
- Make sure the antenna is connected properly and in a location free from EMI and able to receive a signal. Passing the antenna wire through a gland seal with an AC source such as a CT wire will cause interference.