I have one CJ2H-EIP21 PLC with an ethernet hub connected with some devices. There is another CJ1 PLC with ETN21 module also with a hub connected with some devices. Now I need to set up communication between these two PLCs. These two PLCs have difference IP address. what is the best way for hardware? Will I need a router in between? Can I just use a ethernet cable plug to both sides of the hubs? What is the best way for software? Will I have to use FINS communication? Will I need to set up routing table? THX