Specifications

6
Controller Components Controller Components
LED Indicators LED Indicators
The
DDC controller is equipped with three
bank sets of LED that help the user
diagnose problems and or identify normal
operation.
The DDC controller is equipped with three
bank sets of LED that help the user
diagnose problems and or identify normal
operation.
Figure 2 - Network LEDs Figure 2 - Network LEDs
The first bank is located in the upper left
hand corner as shown in the figure 2. They
flash repeatedly when the controller is
communicating with the network and usually
service support refers to them as Rx and Tx.
The first bank is located in the upper left
hand corner as shown in the figure 2. They
flash repeatedly when the controller is
communicating with the network and usually
service support refers to them as Rx and Tx.
The second bank is located on the upper
right hand corner of the controller as shown
in figure 3. The first one from top to bottom
is normally lit (on) while the controller is
powered the second is the heart beat and
will flash during normal operation, the third
LED will remain off and will lit red in case
there is an error in the controller.
The second bank is located on the upper
right hand corner of the controller as shown
in figure 3. The first one from top to bottom
is normally lit (on) while the controller is
powered the second is the heart beat and
will flash during normal operation, the third
LED will remain off and will lit red in case
there is an error in the controller.
Figure 3 - Power LEDs
In addition, when downloading new or
modified versions of software these LEDs
will flash on and off indicating new files are
being written to its non-volatile memory.
In addition, when downloading new or
modified versions of software these LEDs
will flash on and off indicating new files are
being written to its non-volatile memory.