Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-E-G/A User Manual
Rev.
2.16
www.weidmuller.com
35
The WI-MOD-E can be configured for different radio transmission rates. A reduction in rate increases the reliable range
(transmission distance). The factory-default data rate settings are suitable for the majority of applications and should only
be modified by experienced users.
Note: This rate is for Transmit messages only as radio can receive on all data rates.
The WI-MOD-E allows for a configurable
fixed
rate or an
Auto
radio transmission rate. When a fixed rate is configured the
radio transmission rate is never altered, even under extremely poor conditions. The Auto rate will automatically change
the radio data rate to give the best throughput. When a radio transmission is unsuccessful the WI-MOD-E will
automatically drop to the next lowest data rate and if subsequent transmissions are successful at the lower rate, the WI-
MOD-E will attempt to increase to the next highest rate. When a station connects to an access point the two devices
negotiate a data rate based which is within configured range of radio data rates for both devices.
Select the “Radio” Menu to change the following configuration parameters. If a change is made, you need to select “Save
Changes” to retain the changes. Changes will not take effect until the unit is reset.
Radio Mode
WI-MOD-E -G support 802.11b and 802.11g radio standards and to limit
operation to one or the other, select the desired standard. Normally selecting
“auto” allows the modem to make the best choice.
WI-MOD-E -A only supports 802.11a radio standard.
Transmit Power Level
This allows adjustment of the radio power. Do not set the radio power above
the allowed setting for your country You can reduce the power for short range
applications, or to allow the use of high gain transmitter antennas while still
complying with the emission requirements of your country.
See APPENDIX C - for dB to mW conversion.
Channel (AP Only)
WI-MOD-E-G Radio Channels 1 to 13 (depending on country) may be
configured at the Access Point. Refer 3.1 - “Selecting a Channel”.
WI-MOD-E -A Radio channels can be individually set (AP only – Client ignores
the selection) or left in Auto (default) and then select the appropriate U-NII
groups 1,2,3,4 each one having its own group of channels, Maximum Power
and DFS selection.
The default radio channel for both A & G models is Auto, meaning on startup it
will scan all available and selected channel groups (Country dependent) and
pick the quietest channel.
Channel Width (STA
and Auto Channel
Only)
WI-MOD-E-G Stations only. When configured as a Station the module will
periodically scan the channels looking for an Access Point. This option is used
to speed up the Access Point scanning process of the Client radio by only
scanning certain channel bands (5M, 10M, and 20M) or automatically scan all
channels. Default is 20M.
Turbo Mode
(Only for fixed
Channels – No Auto)
Selecting Turbo Mode doubles the transmit data rate offered on a Single
channel. Maximum data rate up to 108Mbps.
Only usable with other Weidmuller WI-MOD-E-A&G modules configured with
the same Turbo Channel. If using the Turbo Mode feature all modem in the
system will need to be configured with Turbo mode and the correct channel to
communicate.
Transmit Data Rate
The radio baud rate in Mega (million) bits per second (Mbps) for point to point
radio transmissions. The default value is Auto. Select a fixed rate to force the
radio to use the selected rate.
Fixing the Tx Rate is recommended except for advanced users.
Note: Increasing the Transmit Data rate will decrease the Transmit power
