I have 13 Micrologix 1400 PLC connected to Ignition via Ewon VPN using GSM SIM.
They are Series B PLCs.
We have added external antenna but still there is a few that keep dropping out and Ignition showing connecting determining protocol/disconnecting protocol. They do connect for while then drop out again.
connection path is set to 1,0
timeout at 120000
browse cache at 240000
Ewon VPN is staying connected and I can get online to Ewon see its settings
Any other things to look at please