How to Connect a PLC Through Ethernet

How to Connect a PLC Through Ethernet

You may want to know how to connect a PLC through Ethernet in order to connect it with your PC. There are a number of ways to do this. The first option involves using the same gateway range as your PC. However, you may find that the PLC and PC have different IP addresses.

Sync Register

To sync your Sync Register with your PC through Ethernet, you must first launch the software and select the Sync option. Next, choose the target folder. You can either select a share or a NAS for the target. Once the Sync process is complete, you can access the shared folder on your destination device.

When using the Sync method, the node A sends a Sync message to node B. The local clock at node B timestamped the Sync message. The node receives the Sync message, and then sends a Follow-Up message. The Follow-Up message contains three pieces of information: a preciseOriginTimestamp that records the time on the grand master clock when the message was sent; a correctionField that records the internal delay between clock events.


If you want to connect your PLC to the internet using Ethernet, you need to configure the PG/PC interface to use TCP/IP mode. Make sure that the PLC you want to connect has an IP address that is within the same subnet or class as your PC. You should also make sure that the PLC has a unique destination port.

If you do not use DHCP, you will need to manually assign an IP address to the PLC. You can do this through the Network and Sharing Center located at the top of the Control Panel. Unplugging the network cable from your PC will display a network status of Unplugged and its name. Click on the connection name to open the Status dialog and the properties dialog.


If you’re considering using NAT to connect your PC to the Internet, you have several options available. First, you can use full-range, which lets you use all ports on the network. You can also use port-map, which lets you reserve specific ports. Lastly, you can use symmetric-port, which supports endpoint independence.

NAT is a security measure that helps to preserve IP addresses. It works by mapping a system’s IP address to an IP address on another network. It does this by changing the IP header of a network packet that is sent over a network traffic routing device. NAT has several different implementations, and each of them affects network traffic differently.

One problem with IP addresses is that there is a limited number of them. In order to avoid a shortage of IP addresses, NATs consolidate multiple private IP addresses into one public IP address. This allows for more machines to be connected to the internet than would otherwise be possible. However, this may cause some ISPs to complain because they have a finite number of customer IPs.

Input header shift

If you’re trying to connect your PC to a Rockwell PLC, it might be necessary to change the header shift of the PC’s input header. However, you might not find that requirement on all PLC manuals. If you’re unsure, check with the PLC provider’s manual.


Wireshark is a network protocol analyzer that can be installed on either a Windows or Linux computer. It provides comprehensive captures of Ethernet traffic. Unlike Fiddler, which only shows a small snapshot, Wireshark provides a pop-up window that shows the interfaces, start button, and traffic flow. After starting Wireshark, you can stop capturing traffic by pressing Ctrl-E, and then attach the resulting pcap file to a support ticket.

Wireshark can run on a single network adapter (NIC). Many laptops come with only one network adapter, but a second one can be added with a PC card. Desktop machines can also be fitted with more than one NIC. Although these types of NICs are invisible at the IP level, they do cause a small packet transmission delay. They may also respond to broadcast messages.