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General Troubleshooting
General Troubleshooting
50 - DeviceMaster UP User Guide: 2000451 Rev. C
•
Verify that the IP address programmed into the Comtrol device matches the
unique reserved IP configured address assigned by the system administrator.
•
If using DHCP, the host system needs to provide the subnet mask and
gateway.
•
Reboot the system and the Comtrol device.
•
If you have a spare Comtrol device, try replacing the device.
This table illustrates some general troubleshooting tips.
Note: Make sure that you have reviewed the
General Condition
PWR or Status LED
flashing
PWR or 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:
http://support.comtrol.com/download.asp.
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 unit from the network. Connect the device
directly to the NIC in the host system (see Page 49).
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.
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.
Troubleshooting and Technical Support
on Page 49.
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Table of Contents
Troubleshooting
