OpenMarine

I have a Seanexx AIS receiver which sends - if no AIS signal is received (so e.g when I test at home) - once a minute (or so ) a system message, just to say device is still alife.
Unfortunatly OP timesout and I then do not know if the line is still listened to as no further system messages get shown.
Is there somewhere a setting to increase this timeout setting?

Thanks for help.