L-Gate User Manual 21 LOYTEC
Version 3.2 LOYTEC electronics GmbH
3.4.9 Wink Action
If the L-Gate receives a wink command on any of its network ports, it shows a blink pattern
on the CNIP and the CEA-709 activity LEDs. The CEA-709 activity and the CNIP LED
turn green/orange/red (each 0.15 s). This pattern is repeated six times. After that, the
CNIP LED flashes orange six times if the wink command was received on the IP channel
or the CEA-709 activity LED flashes orange six times if the wink command was received
on the CEA-709 channel. After that the L-Gate LEDs resume their normal behavior.
3.4.10 Network Diagnostics
The L-Gate provides simple network diagnostics via its CEA-709 activity LED:
If the LED does not light up at all, this port is not connected to any network segment or the
connected network segment currently shows no traffic.
If the LED is flashing green, the network segment connected to this port is ok.
If the LED is flashing red, a potential problem exists on the network segment connected to
this port. This state is referred to as overload condition.
A port overload condition occurs if
• the average bandwidth utilization of this port was higher than 70% or
• the collision rate was higher than 5% or
• more than 15% CRC errors have occurred on a port with a power-line transceiver or
more than 5% on a port with a transceiver other than power-line or
• the L-Gate was not able to process all available messages.
For a deeper analysis of the reason for the overload condition, it is recommended to use a
protocol analyzer (e.g. LOYTEC’s LPA) or a similar tool. The exact reason of the
overload condition can also be determined with the LSD Tool.
3.5 Status Button
The L-Gate is equipped with a status button (see Figure 8). When pressing the status button
shortly during normal operation of the L-Gate, it sends a “Service Pin Message” on the
active CEA-709 network port (FT-10 or CEA-852). It also sends a BACnet “I-Am”
message on all active BACnet data link layers. As an alternative to pressing the status
button, a service pin message can be sent via the Web interface (see Section 4.1).
The status button can also be used to switch the device back to factory default state. Press
the service button and power-cycle the device. Keep the button pressed until the port LEDs
illuminate orange permanently. Release the button within five seconds from that time on to
reset the device to factory defaults. Alternatively, the device can be switched back to
factory defaults over the console UI (see Section 10.2.2).
3.6 DIP Switch Settings
The DIP switch assignment for the L-Gate is shown in Table 3. Please leave all switches at
default state.
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