Yokogawa Wireless Temperature Transmitter YTA510 - Manual (Page 14)

<5. Configuration>
5-1
IM 01C50T02-01E
5. Configuration
This chapter contains information on how to adapt
the function and performance of the YTA to suit
specific applications. Because two or more devices
are connected to Fieldbus, settings including the
requirements of all devices need to be determined.
Practically, the following steps must be taken.
(1) Network design
Determines the devices to be connected to
Fieldbus and checks the capacity of the power
supply.
(2) Network definition
Determines the tag and node addresses for all
devices.
(3) Definition of combining function blocks
Determines the method for combination
between each function block.
(4) Setting tags and addresses
Sets the PD Tag and node addresses one by
one for each device.
(5) Communication setting
Sets the link between communication
parameters and function blocks.
(6) Block setting
Sets the parameters for function blocks.
The following section describes each step of the
procedure in the order given. Using a dedicated
configuration tool allows the procedure to be
significantly simplified. This section describes the
procedure to be assigned for a host which has
relatively simple functions. Refer to Appendix 5
when the YTA is used as Link Master.
5.1 Network Design
Select the devices to be connected to the Fieldbus
network. The following instruments are necessary
for operation of Fieldbus.
• Power supply
Fieldbus requires a dedicated power supply. It
is recommended that current capacity be well
over the total value of the maximum current
consumed by all devices (including the host).
Conventional DC current cannot be used as is.
• Terminator
Fieldbus requires two terminators. Refer to
the supplier for details of terminators that are
attached to the host.
• Field devices
Connect the field devices necessary for
instrumentation. YTA has passed the
interoperability test conducted by The Fieldbus
Foundation. In order to properly start Fieldbus,
it is recommended that the devices used satisfy
the requirements of the above test.
• Host
Used for accessing field devices. A minimum of
one device with bus control function is needed.
• Cable
Used for connecting devices. Refer to
“Fieldbus Technical Information” for details
of instrumentation cabling. Provide a cable
sufficiently long to connect all devices. For
field branch cabling, use terminal boards or a
connection box as required.
First, check the capacity of the power supply. The
power supply capacity must be greater than the
sum of the maximum current consumed by all
devices to be connected to Fieldbus. The maximum
current consumed (power supply voltage 9 V to 32
V) for YTA is 16.6 mA. The cable must have the
spur in a minimum length with terminators installed
at both ends of the trunk.