The issue with my DSAB is unrelated to the battery charger and seems to be not just specific to the AP74 so I have created a new thread for the new info that has been gathered over the past few days.
I have determined and can recreate this issue 100% of the time when the units have been offline for 24hours in a cold 25-35°F hangar.
I have a D100, D120, HS34, AP74. Wiring, pins, connectors have all been checked about 5 times and have been verified good by an ohm meter to less than .01 ohms.
Battery power only with no charger attached and voltage at 12.5 to 13 volts at power up.
DSAB bus is configured with 4 devices all reporting active and each with their roles assigned normally. Data does flow in all directions and the AP74 and HS34 do what they are suppose to.
When the issue happens, on startup afer approximately 1 minute, most of the time the EMS will give a Network connection lost message and the HS34 and AP74 lights will all come on brite. Sometimes the Efis will do the same and sometimes it will never report anything. All data transfer stops.
Sometimes I will also get 4 "instrument function" connection lost messages.
The coms will never return on their own without one of the following:
1. power the system down and back up and all will work well for a time then the same thing happens. This will repeat until the units warm up and then it will not do it again period.
2. Reconfigure the DSAB bus and it will find 4 devices and go right back to working normally and then the same thing happens. This will repeat until the units warm up and then it will not do it again period.
The fact that this issue only happens after a cold soak and only about a minute after startup and is 100% repeatable....I think that pretty much rules out wiring or connection issues. After they warm up, I have ran them hours without any issues.
Now how do I move forward to determine which unit is causing the issue? It is difficult to isolate due to the fact that after a few tries, the issue goes away.
Someone please tell me that the DASB is normally more robust than this!!!!
I have determined and can recreate this issue 100% of the time when the units have been offline for 24hours in a cold 25-35°F hangar.
I have a D100, D120, HS34, AP74. Wiring, pins, connectors have all been checked about 5 times and have been verified good by an ohm meter to less than .01 ohms.
Battery power only with no charger attached and voltage at 12.5 to 13 volts at power up.
DSAB bus is configured with 4 devices all reporting active and each with their roles assigned normally. Data does flow in all directions and the AP74 and HS34 do what they are suppose to.
When the issue happens, on startup afer approximately 1 minute, most of the time the EMS will give a Network connection lost message and the HS34 and AP74 lights will all come on brite. Sometimes the Efis will do the same and sometimes it will never report anything. All data transfer stops.
Sometimes I will also get 4 "instrument function" connection lost messages.
The coms will never return on their own without one of the following:
1. power the system down and back up and all will work well for a time then the same thing happens. This will repeat until the units warm up and then it will not do it again period.
2. Reconfigure the DSAB bus and it will find 4 devices and go right back to working normally and then the same thing happens. This will repeat until the units warm up and then it will not do it again period.
The fact that this issue only happens after a cold soak and only about a minute after startup and is 100% repeatable....I think that pretty much rules out wiring or connection issues. After they warm up, I have ran them hours without any issues.
Now how do I move forward to determine which unit is causing the issue? It is difficult to isolate due to the fact that after a few tries, the issue goes away.
Someone please tell me that the DASB is normally more robust than this!!!!
