WirelessHART Fieldgate SWG70, Operating Instructions Manual

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WirelessHART Fieldgate SWG70 14 Trouble-Shooting
Hauser 83
14.1.3 Expand the Network
In an industrial environment, there are several potential obstacles for radio waves, for example
buildings, walls, pipes, or even moving obstacles like trucks. Those obstacles can reflect, bend,
diffuse or block radio waves. The effects of reflection, bending and diffusion create new waves
which may interfere with the original ones and with each other. They can amplify or nullify each
other. This effect is called fading.
Due to the interference of reflections, moving the antenna a few centimetres can help. If there are
obstacles blocking transmission between wireless devices, add additional devices to provide
alternative communication paths. The more devices exist in a WirelessHART network, the more
reliable it becomes.
14.1.4 Optimize Coexistence with other Wireless Networks
WirelessHART networks (IEEE 802.15.4) use the frequency spectrum between 2400 ... 2483.5
MHz. Various other wireless technologies also use this frequency spectrum, for example WLAN
(IEEE 802.11) and Bluetooth (IEEE 802.15.1). Measures must be taken to ensure that the various
wireless technologies do not affect each other.
If there are problems with other wireless technologies disrupting the WirelessHART network, you
should consider implementing a Coexistence Management policy. More information on this subject
is to be found at the HART Communication Foundation site, www.hartcomm.org, and other
sources on the Internet.