Problem with RFLink:Error opening serial port, how to monitor

[ZaMaticz]

I have problem with Domoticz and RFLink. Sometimes it's giving error about RFLink and serial port connection.
Logs:
2018-01-17 06:48:12.124 Error: RFLink: Error opening serial port!
2018-01-17 06:48:12.327 RFLink: serial retrying in 30 seconds...
2018-01-17 06:48:30.934 Error: RFLink hardware (2) nothing received for more than 15 Minutes!....
2018-01-17 06:48:31.939 Error: Restarting: RFLink
2018-01-17 06:48:32.111 RFLink: Serial Worker stopped...
2018-01-17 06:48:32.331 Error: RFLink: Error opening serial port!

RFLink: Using serial port: /dev/ttyACM0

I have solved this via web site and giving restart system command, but I would like to automate this or if there is better idea of solving problem.
Wiki-sites monitoring script https://www.domoticz.com/wiki/Monitorin ... g_a_script
only checks status and this doesn't help because status seems to be ok when this RFLink problem exists.
Can somebody give me advice how to modify that script so it monitors this error also.