Comtrol 500 DeviceMaster User Manual
Page 65
DeviceMaster 500 User Guide: 2000501 Rev. A
Troubleshooting and Technical Support - 65
Troubleshooting and 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 500.
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 500 from the network.
Connect the device directly to the NIC in the host
system (see Page 63).
Cannot ping or connect
to the DeviceMaster 500
The default 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.
If you do not use the NS-Link driver to program the IP
address, you only have 15 seconds to disable the
Bootloader with Redboot to get into the setup utility.
on Page 49 for the Redboot
method of programming an IP address.
General Condition
Explanation/Action