Garmin SL30 taking commands from GRT 10.1 HXr

[acent05]

I have my Garmin SL 30 set to cereal in the settings and my baud rate on the serial port set to 9600 on the GRT. The frequencies that I tune on the radio itself show up on the GRT but the GRT will not send commands to change the frequency on the SL 30. I have exhausted everything I can find and nothing seems to work. Does anyone have any ideas or experience on this?

 

[BobTurner]

This is pretty trivial, but do you have a second RS232 out line from your efis going to the rs232-in port on the SL30? Some people (me) never bothered hooking it up.

 

[jclark]

This used to work as advertised many years ago, BUT(!!!), it seems that something caused it to not work.

I have had various combinations of GRT + Garmin SL30/40's. I noticed a while back that I could not send the list nor the frequency although I could receive them with my 10.1/SL30 combinations.

A note to GRT is in order. I had not bothered because I found that I never really used it.

Finally, it **MAY** be a wiri g or configuration mistake that you and I have made.

 

[lr172]

This is pretty trivial, but do you have a second RS232 out line from your efis going to the rs232-in port on the SL30? Some people (me) never bothered hooking it up.

+1

On the grt, there are unique config settings for both the rx and tx pin. Are you sure you set up both?

 

[acent05]

I have checked the wiring multiple times. I have the SL30 in serial mode. I have followed all of the GRT protocols in the installation. Thanks for the info. At least I am not the only one.