Yokogawa YFGW710 - Manual (Page 78)

B1-14
IM 01W01F01-01EN
B1.2.2.5 User Application Engineering
User Application Engineering consists of the following three tasks.
• Defining device role
• Defining process data communication (setting which data of the field wireless device is noti-
fied to which device (YFGW710) and at which period)
• Defining Modbus Register map
Loading CF using Field Wireless Configurator displays the attribute information on the field wire-
less device and enables working on the above three definitions.
n Defining Device Role
A device role refers to the functional role of the field wireless device (IO and routing functions).
Field Wireless Configurator displays all the device roles supported by the target field wireless de-
vice. Select the appropriate one from the IO and routing functions according to your needs. You
can select more than one role. In window setting Device Role, the IO function is shown as “IO”,
and the routing function is shown as “Router”.
A field wireless device that joins the field wireless network works with the selected function.
Field Wireless Management Tool allows you to confirm the function with which the field wireless
device works.
Changing the device role of an operating field wireless device causes it to restart when settings
are downloaded. For details, refer to section B1.3.2.1 of this document.
l Notes when the network is star topology
When the network is selected as the star topology in section B1.2.2.2, only the field wireless de-
vice for which the IO function (alone or IO + routing function) is selected for the device role joins
the field wireless network. Only the IO function of all the joining field devices is enabled.
A field wireless device for which the IO function is not selected (only the routing function is se-
lected) is not able to join the field wireless network.
l Notes when the network is mesh topology
When the network is selected as the mesh topology in section B1.2.2.2, the maximum number of
field wireless devices you can set the routing function for the device role is 10.
When setting the routing function for 11 or more field wireless devices, communication with an
unspecified number of field wireless devices connected to the field wireless network in question
may not be performed normally. Such a condition may cause process alarms such as IOP or
a system alarm indicating the field wireless device is no longer joined with Yokogawa's control
system.