Types Of Units - Omron WD30-ME Operation Manual

DeviceNet Wireless Unit
Errors can be monitored
Abundant number of
wireless channels allows
the construction of
multiple systems in the
same area
Relay functions make
possible an extension in
communications
distances
Diversity functions
Maximum number of I/O
per wireless master
station increased
Magnet-base antenna
added to lineup
1-1-3

Types of units

DeviceNet wireless master
station (Wireless master
station)
Multi-pass
phasing
We recommend that this function be used for applications that are not
required to operate in real time (such as displays for indicators and manufac-
turing instruction data transmissions).
DeviceNet slave error information (including errors in wireless slave stations)
can be assigned to two or four status words and monitored from the PLC.
Since the wireless region is divided into 34 frequencies from 2,400 to
2,483.5MHz, you can select an unused frequency for building multiple sys-
tems.
Using a spectral spread method (DS: direct spread) as a modulation method
achieves high-quality communications even in areas of excess noise.
Although communications distances vary according to the installation environ-
ment, the goal indoors is 60m in line of sight.
The relay functions allow an increase in the communications area (to a maxi-
mum of 3 stages).
DeviceNet slaves may also be connected to the relay station.
However, relay station system settings can only be performed from the config-
urator.
Multi-pass phasing is improved with a diversity system (which requires 2
antennas).
The effects of this function are observed when used in areas where variations
in radio waves (such as reflections) occur.
Depending on the switch settings of the wireless master station, the maximum
number of I/O per wireless master station can be increased to 100 words/
100 words (IN/OUT). The maximum number of wireless slave stations that
can be connected has increased to 64.
Using the magnet-base antenna, the station itself can be installed inside a
control panel with the antenna installed outside. Also, because it is mounted
with a magnet, the position of the antenna can be adjusted easily when, for
example, the control panel is moved. Attenuation in the antenna cable (2m),
however, limits the maximum communications distance to approximately 50m
indoors.
• Connects to the DeviceNet network and acts as a virtual DeviceNet slave.
• Maximum number of I/O as DeviceNet slave: IN/OUT = 32 words (512
points)/32 words (512 points) or 100 words (1,600 points)/100 words
(1,600 points) depending on the DIP switch setting. However, if Status is
selected, IN/OUT = 30 words (480 points)/32 words (512 points) or
96 words (1,536 points)/100 words (1,600 points) depending on the DIP
switch setting.
• As the wireless network master station, it controls a maximum of 64 wire-
less slave stations and sends remote I/O transmissions.
• The wireless master station was tested at the test laboratories of a third
part organization authorized by the ODVA. It is authorized as being in
conforming to ODVA conformance software.
Multi-pass phasing is the phenomenon of a radio wave being transmitted form a single point,
passing through multiple propagation paths, and then arriving at a single point.
Section 1-1
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