Roaming Clients
Clients can roam within a system, but there are some limitations due to link timeouts. If the client is connected to an
access point and the link fails due to a hardware problem or the signal level falls below the minimum threshold (
–99
dBm, 25 kHz channel @19200 baud, or
–100 dBm @ 9600 baud), the client will scan for beacon signals
and connect to the access point with the strongest RSSI level (if more than one access points can be heard and
provided the SSID and any encryption methods/keys are the same). This functionality allows clients to roam to
a stronger access point when the signal level gets too low or the link completely fails. The time frame for the
changeover is approximately 105 seconds due to link retires and timeouts.
3.2 LED Indicators
The following table describes the front panel LEDs for all operating conditions.
LED
Condition
Description
OK
Green
Normal operation
OK
Flashing red/green
Module boot sequence
OK
Red
Default quick start mode (unconfigured)
Radio RX
Green flash
Radio receiving data (good signal strength)
Radio RX
Red flash
Radio receiving data (low signal strength)
TX/LINK
Green
Radio connection established
TX/LINK
Red
Radio transmitting
RS-232
Green flash
Data sent from RS-232 serial port
RS-232
Red flash
Data received to RS-232 serial port
LAN
On
Link established on Ethernet port
LAN
Orange flash
Activity on Ethernet port
RS-485
Green flash
Data sent from RS-485 serial port
If expansion I/O is being used this will flash constantly
RS-485
Red flash
Data received to RS-485 serial port
IO
Green
Digital input is on
IO
Red
Digital output is active
IO
Off
Digital output off and input is open circuit
Analog input current loop
IO
Green, different intensity
Dim = 4 mA
Bright = 20 mA
The Ethernet RJ-45 connector on the end of the module incorporates two LEDs. The Link LED turns on to indicate a
connection on the Ethernet port, and blinks off briefly when activity is detected, similar to the LAN LED on the front
panel. The 100-MB LED appears on if the LAN connection supports 100 Mbps. The 100-MB LED appears off if only
the 10-Mbps connection is supported. Other conditions indicating a fault are described in Chapter 5.
3.3 Default Configuration Switch
The WI-MOD-xxx-E-5W will temporarily load factory-default settings if it is powered on with the RUN/SETUP switch
(on the end-plate of the module) in SETUP position. The previous configuration remains stored in non-volatile
memory and will only change if a configuration parameter is modified and the change saved. When in SETUP mode,
wireless operation will be disabled.
Because the default IP address of the modem will be within the IP range 192.168.0.XXX, it may not be compatible
with the network or PC that you are using for configuration. You will temporarily need to change the computers
IP address to allow connection to the module. For details, see
“4.1 Connecting and Logging On” on page 22.
IMPORTANT Remember to return the switch to the RUN position and cycle power at the conclusion of
configuration to resume normal operation.
The following is the default factory configuration of the WI-MOD-xxx-E-5W:
•
Operating mode: Client
