Yokogawa YFGW710 - Manual (Page 62)

<A4. Field Wireless Network>
A4-3
IM 01W01F01-01EN
n Network Form (Topology)
This field wireless system supports two network forms – the start network (star topology) and the
mesh network (mesh topology).
We recommend using the star network because of the clear network operations, easy manage-
ment, and excellent expandability.
l Star network
This network form will keep the communication routes which are set at the time of installation.
The delay time is minimized and high reliability is ensured. In order to establish a star network,
YFGW710s must be arranged appropriately so that all field wireless devices can communicate
directly with any YFGW710.
l Mesh network
If the data delay time will not cause any specific problem, routing devices can be used for wire-
less relay. A system with routing devices allows the range of wireless access to be expanded
easily. However, the mesh network has the disadvantages of increased delay time and shortened
battery life of relaying wireless devices.
IO
G
IO R
G
R
IO IO
Network form Star Mesh
Routes
Hardware components
Redundant route
YFGW710
IO device
YFGW710
Routing device
IO device
Not applicable Applicable
Number of devices /
YFGW710
A maximum of 50 devices/YFGW710
Update Time 1 sec. or more 10 sec. or more
Battery life
Long
Not route-sensitive
Short
Route-sensitive
Expansion of the range
of wireless access
Add YFGW710s Add routing devices
IO IO
IO
G
IO
R
G
FA0402.ai
Note: A network form can be set for each YFGW710.