App-16
IM 04L51B01-41EN
5.4.2
PAN ID (group number)
Wireless devices configure a wireless multi-hop network (wireless PAN) under the
coordinator.
The wireless coordinator configures a PAN using its assigned channel number (frequency
band). A PAN ID is assigned as an identifier to this PAN. Make sure that this PAN ID is a
unique ID for each coordinator.
A preferred PAN ID can be set in each of the wireless repeaters and routers. If a preferred
PAN-ID is specified, connection to that PAN-ID is prioritized, regardless of the RSSI (radio
strength). If the specified PAN ID does not exist within range of the repeater or router or
if network join authentication fails using the PAN ID, an attempt is made to establish a
connection to the PAN with the best RSSI among the available PAN IDs (coordinators) in the
network search that takes place during network connection.
If a preferred ID is not specified, the PAN with the best RSSI among the available PAN IDs
(coordinators) in the network search that takes place during network connection is selected
as the connection destination and the same PAN-ID as the said coordinator is automatically
assigned.
P1 (PAN)
P2 (PAN)
Router
Preferred
connection
ch3, PAN ID=P2
Network name = N1
ch1, 3, 5, network name = N1
PAN ID = P1 (preferred PAN ID)
ch1, PAN ID=P1
Network name = N1
Beacon request
(RSSI=-80)
Beacon request
(RSSI=-70)
P1 (PAN)
P2 (PAN)
Router
Switch
connection
ch3, PAN ID=P2
Network name = N1
ch1, 3, 5, network name = N1
PAN ID = P1 (preferred PAN ID)
ch1, PAN ID=P1
Network name = N1
Beacon request
(RSSI=-80)
Beacon request
(RSSI=-70)
Coordinator 1
Coordinator 2
Coordinator 2
Coordinator 1
Fig. 5.5 Connection to a preferred PAN
Select the PAN ID to assign to the wireless devices from the range of values shown in table
5.4.
Table 5.4 PAN ID
Target
Configuration
Parameter
specification and range
Notes
Parent
Mandatory
4 digit hexadecimal
0x0001 to 0xFFFE
Set a value that does not overlap with
those of other coordinators.
Router
Optional
4 digit hexadecimal
0x0001 to 0xFFFE
Set this parameter to specify the preferred
coordinator to connect to.
In this configuration example, because there is only a single coordinator in the vicinity, the
PAN ID is set to the value shown in Fig. 5.6, without worrying about overlap. The same PAN
ID is assigned to routers to specify the preferred PAN to connect to.
Appendix 5 System Operation Considerations
