The gateway + PLC method is typically used in industrial sites to achieve data transmission, remote monitoring, and control, eliminating labor and improving productivity. PLC remote control of the host in the remote management center eliminates the cumbersome and inconvenient debugging of engineers on business trips.
It should be noted that since some PLCs can only be accessed in the local area network and cannot be accessed across the three-layer network, EOIP technology is required at this time to establish an Ethernet tunnel between the IP transport layers, open up the network, and complete the remote upgrade of the PLC. To achieve remote control of PLCs. That is to ensure that the PLC and the host of the control room are in the same network segment, for example, the PLC ip is 192.168.1.101, and the control room computer ip is 192.168.1.100. This is so that the PLC can be scanned.
Principle topology diagram of PLC remote upgrade based on EOIP
As shown in the topology diagram, using the gateway AR7091 that supports EOIP, the control room host can directly communicate with multiple PLCs on the remote site. This is after configuring IP 192.168.1.100. This has the same effect as connecting to the same switch. Note: The field device can be any IP device, and the network segment can also be arbitrary. It only needs to be in the same network segment as the IP of the control room host, and two-layer interconnection can be realized.
AR7091 Industrial Gateway EOIP Configuration Steps
Tunnel ID: the central and client settings are the same
Peer address: fill in the WAN port IP of the peer
Enable bridging: After enabling, you can achieve two-layer interworking
EOIP industrial gateway functional advantages
Alotcer IoT Industrial Gateway AR7091 supports EOIP, establishes an Ethernet tunnel protocol between IP transport layers, realizes PLC remote upgrade control, and solves cumbersome and complex problems in remote operations; supports real-time response, the fast connection of edge computing, and effective sharing of cloud computing resource loads.
Support GPRS, 4G, 5G network, wide area network, local area network, WIFI and other communication methods, optional NB-IOT communication mode, support wired and wireless backup for each other, support multi-center communication, and communicate with multiple background servers at the same time; Support heartbeat link detection, equipment running software and hardware self-checking technology, automatic reconnection after disconnection, and self-healing of operating faults.
1. Gigabit Ethernet port, Dual-band WIFI, Optional dual-mode 5G
2. Python & SDK (Python 2.7/C) for secondary development
3. VPN, PPTP, L2TP, OPENVPN, IPSEC, GRE, GRETAP
4. OPCUA protocol and MODBUS protocol conversion
5. Supports Microsoft AZURE, Amazon AWS