Yokogawa YFGW710 - Manual (Page 63)

<A4. Field Wireless Network>
A4-4
IM 01W01F01-01EN
n Precautions for a mesh network
Note the following when using a mesh network.
l When the number of IO devices (10 units) + routing devices (2 units) exceeds
12
It is difficult to lay out 12 or more Field Wireless Devices for one YFGW710. In this case, please
contact us in advance.
l Precautions for arranging wireless transmitters
1. Two or more routing devices must be arranged on the host side of IO devices. Be sure to
arrange routing devices and the YFGW710 so that all deceives can have two channels.
2. Up to two hops
Hop 1 is defined as a device that can directly communicate with the Gateway.
Hop 2 is a device that can only establish communication with the Gateway through a routing
device.
We strongly recommend limiting the number of hops to two because of battery life and easy
installation.
Note the above when arranging devices.
R
G
R
IO IO
FA0403.ai
Hop 1
Hop 2
l Service life of the battery of routing devices
The battery life of a routing device depends on the number of IO devices to relay: the more IO
devices, the shorter the battery life.
For details, refer to the standard battery life below.
n Setting routing devices
To change “Device Role” of a field wireless device to “Routing Device,” follow the specific proce-
dure using a field wireless configurator.
For details, refer to “Part B: B1.3.2.1 Device Role” in this manual.