22
1981
2011
-0
7
12
WHA-GW-*
Product Specifications
2.2.1
Network Management
The
Wireless
HART Gateway contains a network manager. The network manager takes
care of the wireless communication between the
Wireless
HART field devices. The network
manager takes care of the creation and maintenance of the wireless mesh network to
ensure proper communication between the
Wireless
HART field devices.
Figure 2.2Network management
First, the network manager sends advertising messages to announce the network
’
s
existence. When a
Wireless
HART field device receives such an advertising message, it
tries to join the network. If the
Wireless
HART field device can identify itself with the same
network ID and join key as stored in the
Wireless
HART Gateway, the field device is allowed
to join the network. Otherwise, the field device will be rejected.
The network manager can also instruct already joined devices to advertise on its behalf.
1
Step 1: Advertising
2
Step 2: Joining
3
Step 3: Scheduling
4
Wireless
HART Gateway
5
Wireless
HART field device
4
1
5
2
3
