SMAR TT400WH, Manual

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Introduction
IX
and determine one or more process units in the plant. For each process unit, allocate a gateway
with unique and specific Network ID. Outline the main field devices.
Identify potential sources of interference
Are there radio communications or other wireless networks in the plant? What protocols and
frequencies do they use? Use high power? Although unlikely, given the robustness of the radios
used by the
Wireless
HART technology, prior knowledge of the answers to these questions may
identify potential sources of interference and to indicate the taking of preventive and/or limiting
actions even before installation. For example, you can select a frequency channel as unavailable,
adding it to the black list of frequencies that is under the Wireless HART Network Manager control.
Integration with the host
The gateway connects the Wireless HART field devices to the host system. Plan what devices and
what data are needed. Also, the stations or applications which will process the data have to be
clearly defined. From this set, among the protocols in the system, define which one will be used for
integration with the host and with the existing tools for configuring the devices. After defining the
protocol for integration, the user has to choose the gateway on the market that best meets your
requirements.
Project
In the project phase, it is recommended the adoption of the practices below. Although conservative,
these practices ensure robustness and scalability to the network.
o Define the Network ID that will be used for all devices in the process unit;
o
Define if the Join Key will be common to all devices or individual and dedicated ;
o Define the policy to be used for the definition of devices (Long) Tags;
o
Use a scale drawing of the process unit;
o Place the gateway in a strategic position in the process unit ;
o
Plan networks with at least five devices;
o Install at least five devices within the gateway coverage area;
o Ensure that 25 % of the devices are within the gateway coverage area;
o Reposition the gateway as needed;
o
Check the coverage area of each device;
o Ensure that each device has three neighbors within its coverage area;