In computer networking, a node is any physical or virtual device that is part of a network. This includes hosts like HMIs and PLCs, as well as devices that help manage network traffic, such as routers, switches, and access points. Every node has a unique identifier like a MAC or IP address and plays a…
A host is any device that connects to a network and can send or receive data. This includes computers, servers, PLCs, HMIs, smartphones, tablets, printers, and much more. Each host typically has its own IP address, which allows it to communicate with other devices over the internet or a local network. Hosts can share information,…
Class of Service (CoS) is a networking feature that prioritizes data traffic to improve performance and reduce latency. CoS is defined by the IEEE 802.1p standard, which assigns priority levels to network packets and is commonly used in industrial automation, VoIP, and video streaming, where certain data needs higher priority. CoS helps ensure critical traffic, like SCADA commands, is delivered without delays. CoS is implemented at Layer 2 using…
Jumbo Frame is an Ethernet frame with a Maximum Transmission Unit (MTU) larger than the standard 1500-byte size, typically supporting 9000 bytes or more. This larger MTU reduces the overhead for data transmission, improving network efficiency. Jumbo Frames are often used in high-performance networks to increase throughput, reduce CPU load, and optimize large data transfers.…
To find the default IP address of your new PLC, and to change its IP address, first click the red Parameter folder in the project window menu in MapleLogic, then click PLC Parameter. Then, in the PLC parameters, click the Ethernet tab. You will see the default IP address set to 100.100.100.100. This is the…
To disable internet access over the HMI’s ethernet port, set the gateway and DNS addresses of the WAN port you want to disable to 0.0.0.0 in the system settings for your device under the Ethernet port Network settings: Press OK to confirm. Once this is done this port will no longer be able to communicate…
Bridge Mode allows a device to function as a network switch, forwarding traffic between LAN ports without modifying packet data. This creates a seamless connection between devices, enabling communication as if they were on the same network. All LAN ports operate as a single network segment, relaying traffic without performing NAT. This mode is useful…
Yes! You can have each LAN port on a cMT or HMI configured for a different network or subnet, in fact, we recommend doing so to keep the ports from conflicting. One thing to keep in mind is that the LAN 1 port is configured for accessing the internet, where LAN 2 is only able…
The specifics will likely differ based on which device you’re specifically working with, but in general, LAN 1 is the port you’d use for a network connection that goes out to the internet, where LAN 2 is strictly for Local Access Networks. In general, we recommend keeping to LAN 2 on your device, unless you…
No, because the video input is constantly being updated it is not possible to overlay HMI objects on to of a video stream from an IP or USB camera.
“Maple Systems HMIs are not affected by CVE-2021-44228, also known as Log4shell, and related vulnerabilities including CVE-2021-45046 and CVE-2021-45105. Users of Maple Systems HMIs do not have to take any further action.” Background Disclosed on December 9, 2021, CVE-2021-44228 is an Apache Log4j vulnerability which may allow remote code execution (RCE) on the target system…
HMI+PLC (HMC) To view the programmed Ethernet parameters of your HMC2, HMC3 or HMC7 on the network, press and hold the lower right corner of the screen while powering on. On a HMC4 series screen, press/click and hold the top left corner of the screen for 5 seconds while the device is powered on.