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[TG11] AIS 650 stops displaying targets
05-24-19, 10:37 AM (This post was last modified: 06-10-19 09:57 AM by Chuck - Raymarine - Moderator.)
Post: #1
[TG11] AIS 650 stops displaying targets
I have an AIS 650 interfaced to an es127 via SeatalkNG and to a Standard Horizon GX2000 via NMEA0183. Both used to work very well, but I have seen numerous occasions in the last few weeks (coming from Panama to Florida) where all AIS targets disappear from display on both devices and don't reappear for several minutes or hours. The boat's AIS data continues to be transmitted during that time (as reported by other vessels). Any ideas on how to fully diagnose / correct the issue, or is it time to replace the unit?

MFD and AIS are on latest software.

Connecting to the AIS 650 with ProAIS2 is normally fine, but I get "USB Device not recognized" on the PC when I plug in the USB cord when it is not displaying targets.

Cycling power on the AIS unit generally causes targets to be displayed again when it powers up.

Thank you,

Tim

Tim Goodyear
SV Mojito
Currently Key West, FL
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05-29-19, 01:42 AM (This post was last modified: 06-10-19 09:58 AM by Chuck - Raymarine - Moderator.)
Post: #2
RE: [TG11] AIS 650 stops displaying targets
Hello Tim,

Some questions:
  • Does the AIS appear in the eS127's SeatalkNG device list (Home > Setup > Maintenance > Diagnostics > Select Device), at the time the problem is happening?
  • What does the AIS's LED show, at the time the problem occurs?
  • Does the AIS work with the PC over USB the rest of the time?
  • If you disconnect the STNG, does the NMEA0183 work?

The AIS is designed to be connected over either SeatalkNG or NMEA0183 but not both at the same time, so it's possible - especially if you have two-way NMEA0183 - that this is causing the AIS's software to crash, or similar.
Alternatively, perhaps you have a power-supply issue where the AIS's supply voltage is dipping when it tries to transmit and this is causing an internal networking failure.

It's not a common issue I've come across personally, so this is a bit speculative.

Regards,
Tom

Raymarine since 1999.
Interests: Diagnosis of problems in sonar/fishfinders, NMEA2000, ethernet comms, autopilots, thermal cameras
Location: Sydney, Australia
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06-08-19, 12:12 PM (This post was last modified: 06-10-19 09:58 AM by Chuck - Raymarine - Moderator.)
Post: #3
RE: [TG11] AIS 650 stops displaying targets
Hi Tom,

Thank you for the response - I had a chance to try out some things on the way from FL to SC.

<Does the AIS appear in the eS127's SeatalkNG device list>
- Yes, it appears in the device list, and the diagnostics information looks fine (if minimal)
<What does the AIS's LED show, at the time the problem occurs?>
- I still need to work on this one; the AIS is installed behind a panel that is a pain to remove when offshore. I will relocate the AIS unit to be accessible before we set off on another offshore leg on Wednesday
<Does the AIS work with the PC over USB the rest of the time?>
- Yes, no problems with connecting at other times
<If you disconnect the STNG, does the NMEA0183 work?>
Per the second question, I can't easily make that happen at present, but will devise an environment where I can later this week

The AIS is connected over SeatalkNG and is sending data over 0183 to a Standard Horizon GX2000 for display. It isn't connected to receive 0183 data. This setup had been working fine for two years, but is no longer reliable. I see the issue when motoring (battery voltage at 13.6V or above) or sailing (typically 12.4V minimum after an overnight passage). I'll try the voltage measurement as well.

My only other thought is an intermittent antenna issue, but every time I test with ProAIS2, the SWR is good, and I don't have receive / transmit problems with the VHF using the same antenna. I have a second antenna on a stern arch - obviously with less overall range than masthead. It seems to be worse all round (range and clarity) than the masthead.

Any other thoughts / diagnosis tips?

Many thanks,

Tim
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06-12-19, 01:16 AM
Post: #4
RE: [TG11] AIS 650 stops displaying targets
Hello Tim,

The only other thing I can think to suggest at the moment is that you record some of the NMEA2000 traffic during an instance of the problem, to see whether it's communicating at all. We can read the log for you if you send it in.

Other than that, the failure of the AIS to be correctly detected over USB at the time the problem occurs suggests an internal fault, if it's not a supply problem - remembering that supply reaching the AIS may be a lot lower than at the batteries or distribution panel.

One other possibility - it could conceivably be a grounding problem, if either the Standard Horizon or the PC (PC's power supply from an invertor?) weren't isolated.

Regards,
Tom

Raymarine since 1999.
Interests: Diagnosis of problems in sonar/fishfinders, NMEA2000, ethernet comms, autopilots, thermal cameras
Location: Sydney, Australia
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