General Troubleshooting - Comtrol Device Master UP Hardware User's Manual

Troubleshooting and Technical Support

General Troubleshooting

52 - Troubleshooting and Technical Support
This table illustrates some general troubleshooting tips.
Note: Make sure that you have reviewed the
General Condition
Status LED flashing
Status LED not lit
Cannot ping the device
through Ethernet hub
Cannot ping or connect
to the DeviceMaster UP
DeviceMaster UP
continuously reboots
when connected to some
Ethernet switches or
routers
Troubleshooting Checklist
Explanation/Action
Indicates that boot program has not downloaded to the
unit.
1. Reboot the system.
2. Make sure that you have downloaded the most
current firmware for your protocol.
Note: If the PWR or Status LED is still flashing,
contact Technical Support.
Indicates that power has not been applied or there is a
hardware failure. Contact Technical Support.
Isolate the DeviceMaster UP from the network.
Connect the device directly to the NIC in the host
system.
The default DeviceMaster UP 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.
Invalid IP information may also cause the switch or
router to check for a gateway address. Lack of a
gateway address is a common cause.
DeviceMaster UP 16-Port Hardware User Guide: 2000596 Rev. B
on Page 51.