Sure – the noise could load up a buffer with various commands that take some time to execute. Have you tried any filters or scoping the alternator output? My old Toyota Avalon had an issue with the alternator where it was charging poorly and putting enough noise out to make the ABS and traction control randomly trip offline. Joe Coquina
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of David Knecht via CnC-List Sent: Friday, September 30, 2016 8:22 AM To: CnC CnC discussion list Cc: David Knecht Subject: Stus-List Chart plotter problem I have posted about this problem before, but still have not solved it. I have been struggling with a electrical system problem since I upgraded my electronics two years ago. I installed a Seatalk network, Raymarine EV-100 autopilot and B&G Zeus T8 chart plotter. The problem is that periodically, the Zeus behaves like it has a mind of its own. The unit will begin beeping while the touchscreen acts like someone is activating menus and commands randomly. All kinds of problem ensue from that let alone that you can’t use the controls while it is happening. It happens intermittently, sometimes with engine on and sometimes off and I have not been able to identify the source. One of the things I have noticed is that it happens more often (but not exclusively) when the engine is running. Last weekend, I had an incident of this that might help someone understand it. I unplugged the Seatalk cable to the chart plotter to see if it had anything to do with the network (it doesn’t). I had the chart plotter on for about 45 minutes while I did other things and all was fine. Then I started the engine and the Zeus immediately began beeping and randomly activating menus. This continued for the time I had the engine running (about 15 minutes). So that would seem to point toward something people have suggested before- noise in the electrical system from the alternator. Here is what I don’t understand- I shut the engine off and the problem persisted with decreasing frequency for another 10 minutes or so and eventually stopped and it worked fine thereafter. If this were an alternator problem, is there some way it could persist for so long after the engine was shut down. Dave Aries 1990 C&C 34+ New London, CT [cid:image001.png@01D21AF4.D77B4C50]
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