Toshiba T300MVi - Manual (Page 23)

10
8. LED Indicators
The interface contains several different LED indicators, each of which conveys
important information about the status of the unit and connected networks.
These LEDs and their functions are summarized here.
8.1 Ethernet Port Indicators
The Ethernet Port RJ45 connector has three LEDs positioned immediately
below it.
SPD...... SPeeD: solid green whenever a 100BaseT Ethernet connection is
established.
LNK...... LiNK: solid green whenever a valid Ethernet connection is detected.
ACT...... ACTivity: flashes amber whenever network activity is detected.
8.2 RS485 Port Indicators
The RS485 port has two green LEDs that indicate TX data and RX data activity.
Note that although these LEDs are indeed associated with the RS485 port, they
are physically integrated within the RS232 port’s RJ45 connector. Refer to
Figure 3 for the meanings and positions of these LEDs.
RS485 Transmit
Indicator
Blinks when data is
sent out the RS485
port by the interface
RS485 Receive
Indicator
Blinks when data
is received by the
interface.
Figure 3: RS232 Port Indicators for RS485 Activity
NOTE that the RS485 receive indicator LED lights whenever the interface
receives data on the port. This does NOT indicate the validity of the data with
respect to any particular protocol or even whether or not the data is targeting
this specific node. It simply shows that that data exists and is being detected.
Also note that because the RS485 network is 2-wire (half-duplex), the interface
will also indicate data reception whenever it transmits data.