Yacht Devices YDNG-03, Руководство пользователя, Страница: 15 / 48

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V. LED Signals
The Device is equipped with a bi-color LED that indicate the Device’s state. The Device produces a short
single green flash after powering on, indicating that the Device is functioning.
1. Signals during normal operation
During normal operation, Device produces a series of six flashes every five seconds. The Flashes indicate
the state of Device interfaces over the last five seconds and have the following meaning:
• Flash #1.
GREEN if data is received from the NMEA 2000 interface, otherwise RED. Note that
filters and other Device settings do not effect this signal. RED usually indicates problems at the level
of the physical connection.
• Flash #2. GREEN if data transmitted to NMEA 2000. This signal may be RED if nothing was received
from NMEA 0183, or conversion was prohibited by the filter settings (see Section VI).
• Flash #3.
GREEN if data was received from NMEA 0183 interface. A RED signal may indicate
the incorrect speed of the NMEA 0183 port or problems with the physical connection.
• Flash #4. Checksum signal. GREEN if no checksum error found in incoming NMEA 0183 messages
(only messages not blocked by filters are verified). RED if errors were found or nothing was received
(Flash #3 is RED).
• Flash #5.
GREEN if data was transmitted to NMEA 0183. As there is no confirmation of reception,
this signal does not mean that data was received by any listener. RED means that Gateway has nothing
to send, because nothing was received from NMEA 2000 or everything was prohibited by filters
(see Section VI).
• Flash #6. Overflow signal. GREEN if no overflow occurs (see VII for details) in the outgoing
NMEA 0183 queue. RED if overflow is detected or nothing was transmitted (Flash #5 is RED).
The 4th signal is very important for checking the connection wiring and quality. For example, connecting
of TX+ and TX- wires from different ports or even from different devices can remain undetected
for a long time. However, when both ports (devices) are transmitting at the same time, the message
is corrupted, and a checksum error signal indicates the problem. Electromagnetic noise from power