Comtrol UP 16-Port - Manual (Page 53)

DeviceMaster UP 16-Port Hardware User Guide: 2000596 Rev. B Troubleshooting and Technical Support - 53
Troubleshooting and Technical Support
DeviceMaster UP LEDs
The DeviceMaster UP has network and port LEDs to indicate status. This
subsection discusses:
• TX/RX LEDs
• Network and Device LEDs on Page 53
TX/RX LEDs This subsection discusses RX and TX LEDS on the DeviceMaster LT.
The RX (yellow) and TX (green) LEDs function accordingly when the cable is
attached properly to a serial device.
Note: The RX/TX LEDs cycle during the reboot cycle.
The LEDs do not function as described until the port has been opened by an
application.
You can use Test Terminal to open a port or ports if you want to test a port or
ports.
The RX (green) and TX (yellow) LEDs functions are displayed in the following
table when the cable is attached properly to a serial device.
Network and Device
LEDs The LEDs indicate that the default DeviceMaster UP application is running. If
you have loaded PortVision DX, you can check the DeviceMaster UP status on-
line.
• If the Status LED on the DeviceMaster LT is lit, it indicates the DeviceMaster
LT has power and it has completed the boot cycle.
The Status LED flashes while booting and it takes approximately 15 seconds
for the Bootloader to complete the cycle. When the Bootloader completes the
cycle, the LED has a solid, steady light that blinks approximately every 10
seconds.
• The green Ethernet LED indicates that a link has been established and the
yellow Ethernet LED indicates activity.
LED Mode Description LED Status
RX (Green)
RS-232
No valid RS-232 device is
connected
Always off
Valid RS-232 device is
connected but no data
transmission is occurring
On
Data being received LED blinks
RS-422/485
No data being received Always off
Data being received LED blinks
No mode No mode selected Always off
TX (Yellow) RS-232/422/485
No data being transmitted Always off
Data being transmitted LED blinks