General troubleshooting – Comtrol DeviceMaster LT User Manual
Page 113
DeviceMaster LT User Guide: 2000586
Rev. B
Troubleshooting and Technical Support - 113
General Troubleshooting
General Troubleshooting
This table illustrates some general troubleshooting tips.
Note: Make sure that you have reviewed the
General Condition
Explanation/Action
Status LED flashing
Indicates that the bootloader has not downloaded to the
DeviceMaster LT.
1.
If applicable, remove the NS-Link driver.
2.
Make sure that you have downloaded the most
current driver:
ftp://ftp.comtrol.com/dev_mstr/LT/
drivers/
.
3.
Install the latest driver and configure the
DeviceMaster LT using the MAC address. Make
sure that you reboot the system. See
on Page 29 for procedures.
Note: If the Status LED is still flashing, contact
Technical Support.
Status LED not lit
Indicates that power has not been applied or there is a
hardware failure. Contact Technical Support.
Can ping the Comtrol
device, but cannot open
the ports from a remote
location.
(You must have
previously programmed
the IP address, subnet
mask, and IP gateway.)
The NS-Link driver uses Port 4606 (11FE h) to
communicate with the DeviceMaster LT.
When using a sniffer to track NS-Link packets, filtering
for Port 4606 will easily track the packet. The packet
should also contain the MAC address of the device and
the originating PC so that it can be determined if the
packet is able to travel the full distance one way or not.
If the 4606 packet is found on one side of a firewall or
router, using sniffer, and not on the other side, then that
port needs to be opened up to allow the 4606 to pass.
This will most often be seen with firewalls, but is also
seen in some routers.
Cannot ping the device
through Ethernet hub
Isolate the DeviceMaster LT from the network. Connect
the device directly to the NIC in the host system.
Cannot ping or connect
to the DeviceMaster LT
The default DeviceMaster LT IP address is often not
accessible due to the subnet masking from another
network unless 192.168 is used in the network.
In most cases, it will be necessary to program in an
address that conforms to your network. See
on Page 18 to use PortVision DX to
program the IP address.
If you do not use PortVision DX (or the NS-Link driver
for Windows) to program the IP address, you can use
RedBoot.
If you use RedBoot, you only have 15 seconds to disable
the Bootloader with RedBoot to get into the setup
utility. See
on Page 99 for the
RedBoot method of programming an IP address.