T122 not registering on MFD

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum pwolfpwolf,

Please note that care must be employed when interfacing the MFD to the MicroNet Wireless Interface to prevent data looping. Unless a programmable NMEA 0183 multiplexer (programmed to only pass instrument data sentences) is installed between the NMEA 0183 output of the wireless interface and the MFD's NMEA 0183 input port (programmed to not transmit data sentences including instrument data), a data loop may be created.

Regarding the specific problem reported, there may be an issue the fault may be rooted in any one of the following:
- faulty NMEA 0183 wiring ... test each circuit end to end for continuity
- a fault with the MFD's NMEA 0183 ports ... Please click here to view a FAQ addressing how to test the MFD's NMEA 0183 ports.
- a fault with the NMEA 0183 port of the wireless transmitter ... should the MFD's NMEA 0183 ports be found to be operational, then the wireless transmitter's NMEA 0183 output terminals may be interfaced to the MFD's NMEA 0183 input leads. The corresponding NMEA 0183 input port (Rx) buffer of the MFD may then examined to determine whether it is receiving any data sentences from the wireless transmitter. If so, then the devices are communicating and all one need then do is configure the MFD to display Wind data ... recommend starting with apparent wind.