Yokogawa YFGW710 - Manual (Page 167)

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n Topology Graph
When this page is loaded, the topology graph is generated based on the latest topology informa-
tion available. The status bar at the top of the graph section indicates the time of the last topology
information update. Topology information is automatically updated, but clicking the button
forcibly generates the Request Topology and Get Contracts and Routes commands, but note
that this will imposes burden on the network, and may take 30 to 40 seconds, depending on the
size of your network). Pressing the button will refresh the topology information. You can also
refresh the data at 15, 30, or 60-second intervals, by enabling the [Autorefresh] option at the bot-
tom right corner of the page.
The graph displays the devices on multiple layers delimited by horizontal lines, the layers being
numbered from 0 to n, where n is a natural number. The layer number is indicated in the bottom
left corner of a layer. You can move the devices freely within the range of their layer using drag
and drop, to obtain better visibility of the topology.
The Gateway (YFGW-GW), System Manager (YFGW-SM), and Backbone Router (YFGW-BBR)
are found on layer 0, while devices joined via the backbone router are located on layer 1. Other
devices on any given layer (n) will be included in the network and communicate via the router
functions of devices on the higher layer (n-1).
The field wireless devices transmit data via the backbone router, which is the central device in the
network. The backbone router further relays to the gateway and the system manager, while the
system manager controls the entire network. The field devices can have measurement functions
such as temperature and pressure measurement.
The devices are represented by their respective icons. Placing the cursor over an icon shows
device descriptions, which include the following device details.
• EUI-64 address (Device unique 64bits address)
• device role
• subnet ID
• device tag
• manufacturer
• model