Communication loss

When there are communication problems in Integra, the top section on the screen header will flash what DGP is failing.

Entering DGP Diagnosis screen to check the DGP is the best method to see what is going on. Also, is recommended to check the respective LEDs on the spider hub in order to see if there is at least some communication.

Below is a list of typical problems and what to look for wheever a communication loss happens:

1. Lights on the spider hub: There is a green LED that indicates power on the board. If it isn't on, then check the input power. The board accepts both AC and DC power in the range of 12V (DC only) to 24V. Minimum for AC power is 18V.
2. Solid LED on a channel: If a communication IC or wires were shorted somewhere then it can "hang" the communications. If unplugging the channel with the solid LED gets it off and the rest of the complex starts working, then this is the channel with problems. If that channel connects to multiple houses then try disconnecting all and plugging one in at a time until you find the one that hangs the system.
3. Diagnostics: In DGP Diagnosis screen, check the DGP type. It should be in the range of 50 - 54 unless it isn't initialized. It will then be in the range of 150 - 154. There are a few very old boards with type 49 too.Zero for the DGP type indicates it isn't communicating.

4. Communications sent out, nothing back: This issue is usually related to broken wires or a bad board. For DGP boards, each has a transmit and receive LED. When the PC sends out a request it goes to every DGP in the system. You should see the receive LED blink on every board. Splitter boards has a receive LED that should blink. If you don't see the receive then there could be either broken wires or blown comm fuse.
5. Intermittent communications: In a DGP board, each comm fuse module has 4 fuses (RX+, RX-, TX+ and TX-), one for each signal. When just one fuse is blown then communications will sometimes work, but not reliably. This is caused by the signal with the blown fuse floating and sometimes at a level that allows the command to be received and other times not. Also, check if two DGP boards have the same address then they fight each other to respond.