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LED simulation Working with WBM WBM menus Management menus - the Start menu The "System" WBM menu The "X" WBM menu The "Agent" WBM menu The "Ping" WBM menu The "Switch" WBM menu The "Statistics" WBM menu Configuration and diagnostics over SNMP MIB variables Settings in HW Config Configuring alarms Configuring MRP Configuring the topology Structure of the data records Approvals and markings Technical specifications Dimension drawings The following safety notices must be adhered to when setting up and operating the device and during all work relating to it such as installation, connecting up, replacing devices or opening the device.
This does not apply to V There is an additional requirement if devices are operated with a redundant power supply:. If the equipment is connected to a redundant power supply two separate power supplies , both must meet these requirements. When used in hazardous environments corresponding to Class I, Division 2 or Class I, Zone 2, the device must be installed in a cabinet or a suitable enclosure. Switching technology allows extensive networks to be set up with numerous nodes and simplifies network expansion.
Make sure that the maximum permitted cable lengths for the relevant devices are not exceeded. You will find the permitted cable lengths in the technical specifications. IE Switches X are first connected over their ring ports to form a bus.
The two ends of the bus are closed to form a ring by a switch operating in the redundancy manager mode. When a switch is used as the redundancy manager, the ring ports are isolated from each other if the network is operating problem-free. Reconfiguration takes place within 0. As soon as the problem has been eliminated, the original topology is restored; in other words, the ring ports in the redundancy manager are once again disconnected from each other.
There are various options available to increase the network availability of an Industrial Ethernet network with optical or electrical linear bus topologies:. To set up a ring topology with media redundancy, you bring together the two free ends of a linear bus topology in one device. Closing the linear bus topology to form a ring is achieved with two ports ring ports of a device in the ring. This device is the redundancy manager. All other devices in the ring are redundancy clients.
The two ring ports of a device are the ports that establish the connection to its two neighboring devices in the ring topology. The ring ports are selected and set in the configuration of the relevant device. Create the configuration of the devices to be connected to form a ring before you close the ring. When using media redundancy, the data paths between the individual devices are reconfigured if the ring is interrupted at one point.
Following reconfiguration of the topology, the devices can once again be reached in the resulting new topology. In the redundancy manager, the 2 ring ports are disconnected from each other if the network is uninterrupted. This prevents circulating data frames.
In terms of data transmission, the ring topology is a linear bus topology. The redundancy manager monitors the ring topology. It does this by sending test frames both from ring port 1 and ring port 2.
The test frames run round the ring in both directions until they arrive at the other ring port of the redundancy manager. An interruption of the ring can be caused by loss of the connection between two devices or by failure of a device in the ring. If the test frames of the redundancy manager no longer arrive at the other ring port, the redundancy manager connects its two ring ports.
This substitute path once again restores a functioning connection between all remaining devices in the form of a linear bus topology. The time between the ring interruption and restoration of a functional linear topology is known as the reconfiguration time. As soon as the interruption is eliminated, the original transmission paths are established again, the two ring ports of the redundancy manager are disconnected and the redundancy clients informed of the change.
The redundancy clients then use the new paths to the other devices. The mechanisms of these methods are similar. Meanwhile, if you need a specific page out of this manual printed out, you can check out our PDF File Management page…. Meanwhile, do check what we have for you on our homepage, we just recently published our guide on how to reduce PDF file size, as well as a tutorial on how to save different files as PDF.
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