SKF CMWA 8800, Service Manual, Page: 73 / 104

Network Planning and Diagnostics
Network Diagnostics
SKF Wireless Machine Condition Sensor 67
Service Manual
50% path stability. (See the example in Network Diagnostics Details later in this
chapter. Stability is indicated in orange.)
RSSI (Received Signal Strength Index) – Indicates the power of the received signal for
each neighboring device. (See the example in Network Diagnostics Details later in this
chapter. RSSI is indicated in purple.)
Number of joins – Verify in the network statistics file that the number of joins of each
sensor stays the same. An increasing number indicates sensor reset, which means
dropping from the network or weak signal strength. (See the example in Network
Diagnostics Details later in this chapter. Number of Joins is indicated in red.)
Two parents – Use the gateway’s web page topology view to identify at least two links
that are available for each sensor. These paths do not have to be in use currently, they
just have to be discovered and reported by the network.
Topology View
The traffic and stability data that is displayed in the topology view represents a single
statistics cycle of 15 minutes. Therefore, the data is not immediately available, but
displays only after a statistics cycle of 15 minutes has been completed. Use the colors
(a legend is provided below) to determine if all connected field devices have good quality
connections and good quality alternative paths.
Go to the gateway’s web page, Diagnostics > Wireless Communication > Topology
View .
Figure 36 .
Path to the Topology View.

Another path to access the Topology View is through the
Engineering node. Use the Engineering node path to set up the
Topology View and manipulate the components on the image.
In the following example, devices with green status icons (with a check mark) are linked
and available. Devices with red status icons and no connection paths have no network
connection and are unavailable.