Network Planning and Diagnostics
Troubleshooting Network Issues
74
SKF Wireless Machine Condition Sensor
Service Manual
Troubleshooting Network Issues
Issue: No Sensors Join
If no sensors join the network, check the
following items:
•
You did not wait long enough;
joining is
still in progress.
•
The sensors are not activated (powered on).
•
The network ID and/or
Join Key of the gateway security manager do not match the
security credentials of the sensors.
•
The gateway antenna may have an issue, such as: the antenna is blocked, the
antenna or antenna cable is damaged, or the cable length has produced power loss
if a remote antenna is used.
•
The sensors are all placed too far away (beyond 50 m line of sight) from the
gateway or access point.
•
P+F gateways do not have an Access Control List (ACL) but other gateways may
have one. If the gateway has an ACL, make sure the sensors are on the list.
Issue: Some Sensors Do Not Join
If some sensors
join
the network and others do not, you have at least established that
the network manager and access point are functional. The reasons that some sensors
do not
join
may include:
•
Some sensors are placed too far away. If you are adding new sensors, make sure
that the sensors that were previously peripheral are now enabled as routing
devices.
•
Some of the sensors do not have the correct security credentials to join this
network manager (Network ID, Join Key).
•
The maximum number of sensors on the gateway network manager (250) has
been reached.
•
If the gateway has an ACL, make sure the sensors are on the list.
•
The join process has exceeded one hour and sensors that did not join in time have
turned off.
Issue: One Sensor Does Not Join
If the number of sensors that fail to join is small relative to network si
ze (such as 1 or 2
in 100), then the likely reasons include:
•
The sensor is not activated.
•
The sensor has an RF problem (it may be broken or the antenna is not attached).
•
The sensor has the wrong security credentials.
•
The sensor is placed too far away from the rest of the network.
•
The maximum number of sensors on the network manager has been reached.