mbell20688
New member
Hello. I think I discovered a problem with NMEA 2000 PGN output while using multiple TZT13XL MFD's. I bought a NMEA 2000 bus analyzer to help understand the symptoms I was seeing. While operating a single MFD the water depth PGN is sent reliably once per second. When a second MFD is booted the same PGN is output 3-5 times at one second intervals, and then is not output for 5-15 seconds. The non-output periods are shorter if all other PGN outputs from the MFD are turned off, but there are about 5 second intervals without water depth PGN outputs. I log these NMEA 2000 depth messages for use by others, so reliable depth PGN messages are important.
The transducer is connected to one MFD, and that is the only device that sends these PGNs. NMEA 2000 bus voltages and terminations are normal and bus loading never exceeds 8-10%. Other devices on the NMEA 2000 bus have no effect on this, and operating the DRS6ANXT radar also has no effect. I have data log files if that would be helpful.
The transducer is connected to one MFD, and that is the only device that sends these PGNs. NMEA 2000 bus voltages and terminations are normal and bus loading never exceeds 8-10%. Other devices on the NMEA 2000 bus have no effect on this, and operating the DRS6ANXT radar also has no effect. I have data log files if that would be helpful.
