How to Communicate Between Two PLCs Across Different Subnets

1. Network CouplerHow to Communicate Between Two PLCs Across Different Subnets2. Layer 3 Switch – Set up VLAN Configure the Virtual Local Area Network (VLAN) functionality3. In TIA Portal, check the option to use a routerHow to Communicate Between Two PLCs Across Different SubnetsHow to Communicate Between Two PLCs Across Different Subnets4. Extend Subnet Mask The table below shows the address range that can communicate after extending the subnet mask (having too many devices on the network may slow down overall network speed)

Subnet Mask IP Address Range Available Hosts
255.255.255.0 192.168.0.1~192.168.0.254 254
255.255.254.0 192.168.0.1~192.168.1.254 510
255.255.252.0 192.168.0.1~192.168.3.254 1022
255.255.248.0 192.168.0.1~192.168.7.254 2046
255.255.240.0 192.168.0.1~192.168.15.254 4094
255.255.224.0 192.168.0.1~192.168.31.254 8190
255.255.192.0 192.168.0.1~192.168.63.254 16382
255.255.128.0 192.168.0.1~192.168.127.254 32766
255.255.0.0 192.168.0.1~192.168.255.254 65534

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