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Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-E-G/A User Manual
How a Link connection is lost
The Access Point refreshes the link status with a Client every time a message is received from that Client. If nothing is
received from a Client for a period of 120 seconds, the Access Point sends a "link-check" message. If there is no
response to the link-check a De-authenticate message is sent and the link is dropped.
A Client monitors beacon messages from an Access Point to determine whether the link is still present. If the Client can
no longer receive beacons from the Access Point it assumes the AP is out-of-range and the link is dropped. Whenever a
Client is not connected to an AP, it will cyclically scan all available channels for a suitable AP.
Roaming Clients
Clients can roam within a system however if the link to the Access Point fails or the radio signal level becomes too weak it
will scan for beacons and connect to an Access Point (provided the SSID and any Encryption methods, keys, etc are
compatible). If there are multiple Access Points it will select the connection with the best signal level. This functionality
permits a client to have mobility whilst maintaining a link with the most suitable AP.
LED Indication
The following table details the status of the indicating LEDs on the front panel under normal operating conditions.
LED Indicator
OK
OK
Radio RX
Radio RX
TX/LINK
TX/LINK
RS-232
RS-232
LAN
LAN
RS-485
RS-485
DIO
DIO
DIO
The Ethernet RJ45 port incorporates two indication LEDs. The LINK LED comes on when there is a connection on the
Ethernet port, and will blink off briefly when activity is detected on the Ethernet Port. The 100MB LED indicates that the
connection is at 100 MBit/Sec. The 100MB LED will be off for 10MB/Sec connection.
Other conditions indicating a fault are described in CHAPTER 4 - "DIAGNOSTICS".
Rev. 2.16
Condition
GREEN
Flashing RED / GREEN
GREEN flash
RED flash
GREEN
RED Flash
GREEN flash
RED flash
ON
Flash
GREEN flash
RED flash
GREEN
RED
Off
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Meaning
Normal Operation
Module Boot Sequence
Radio receiving data (Good Signal Strength)
Radio receiving data (Low Signal strength)
Radio Connection Established
Radio Transmitting
Data sent from RS-232 Serial Port
Data received to RS-232 Serial Port
Link Established on Ethernet port
Activity on Ethernet port.
Data sent from RS-485 Serial Port
Data received to RS-485 Serial Port
Digital Input is grounded.
Digital Output is active
Digital Output OFF and Input is open circuit.
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