What happen when i stabilize frequancy of MODBUS is 0?

               I use wirless MODBUS communication between UR10e and MiR100 by wifi6(802.11ax) router (2.4Ghz or 5GHz i tried it all is same result). 
               Often times it disconnects. I try to change frequency of communication on UR10e keep getting less so looks like it is getting better but sometimes it disconnect but it takes time longer. 
              Could you help me for 0% disconnect?