Also, it saves engineering time as it streamlines network installation, maintenance, and troubleshooting. When installing a PROFIBUS network, users link each device to the next in a process commonly referred to as daisy-chaining, resulting in a line topology.
Also, they can employ star or tree topologies for more advanced configurations, although this is less common. It covers network design, configuration, installation, commissioning, and maintenance. There is a variety of topology options: line, star, tree, and ring. You can utilize standard Ethernet switches to implement flexible topology options cost-effectively.
The only requirement for switches is Mbps, full-duplex. DeviceNet is classified as a field bus, per specification IEC The variable, multi-byte format of the CAN message frame is well suited to this task as more information can be communicated per message than with bit-type systems. DeviceNet can support up to 64 nodes, which can be removed individually under power and without severing the trunk line. A single, four-conductor cable round or flat provides both power and data communications.
It supports a bus trunk line drop line topology, with branching allowed on the drops. Reverse wiring protection is built into all nodes, protecting them against damage in the case of inadvertent wiring errors. Next, you must analyze the protocols. Imagine for example that 2 persons are trying to talk over a telephone line. If they can hear each other, then they share the same infrastructure phone lines, exchanges, telephone sets ; but if one speaks only English and the other only Arabic they do not share protocols the conversation will not work.
They would require a translator a gateway, for example to understand each other. So Siemens uses specific protocols with electronic modules developed for that purpose; and Rockwell does the same with its equipment.
Daniel Chartier. Profibus and Profinet are very different protocols that use different cables and connectors. With over 50 million devices installed by the end of , it is a well established technology used in many different control applications. A Profibus connection port may look very familiar to you; It looks just like a standard DB-9 serial connector. While it may look the same, the underlying protocol is very different.
Most Profibus cable looks like what you see in the image below. It is easily recognizable by its purple outer jacket. Some Profibus connectors have a pass-through port on the back of the connector so that you can daisy chain another device to the bus.
Note that both kinds of connectors have a red switch on the back. This switch controls the Terminating Resistor. The terminating resistor indicates the end of the Profibus network.
If these switches are set incorrectly, a bus fault will occur. Each device on a Profibus network must have a unique address, ranging from 1 to
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