Comtrol Modbus Server - Manual (Page 37)

DeviceMaster Modbus Server User Guide: 2000535 Rev. C Troubleshooting and Technical Support - 37
Troubleshooting and Technical Support
This section contains troubleshooting information for your DeviceMaster. You
should review the following subsections before calling Technical Support because
they will request that you perform many of the procedures or verifications before
they will be able to help you diagnose a problem.
• <hyperlink-CrossReference>Troubleshooting Checklist on Page 37
• <hyperlink-CrossReference>General Troubleshooting on Page 38
• <hyperlink-CrossReference>Daisy-Chaining DeviceMaster 2E/4-Port Units on
Page 39
If you cannot diagnose the problem, you can contact <hyperlink-
CrossReference>Technical Support on Page 40.
Troubleshooting Checklist
The following checklist may help you diagnose your problem:
• Verify that you are using the correct types of cables on the correct connectors
and that all cables are connected securely.
Note: Most customer problems reported to Comtrol Technical Support are
eventually traced to cabling or network problems.
• Isolate the DeviceMaster from the network by connecting the device directly to
a NIC in a host system.
• Verify that the Ethernet hub and any other network devices between the
system and the DeviceMaster are powered up and operating.
• Reset the power on the DeviceMaster and watch the PWR or Status light
activity.
Model Connected to
Ethernet
Cable
Connector Name
1-Port Ethernet hub or NIC Standard 10/100 ETHERNET
1-Port Embedded Ethernet hub or NIC Standard RJ45 port (not labeled)
2-Port - 1E (All
models)
Ethernet hub or NIC Standard 10/100
2-Port - 2E (All dual
Ethernet ports)
Ethernet hub or NIC Standard 10/100 - E1/E2
4-Port
NIC Standard DOWN
Ethernet hub Standard UP
PWR or Status LED Description
5 sec. off, 3 flashes, 5 sec. off, 3 flashes ... Redboot ™ checksum failure.
5 sec. off, 4 flashes, 5 sec. off, 4 flashes ... SREC load failure.
5 quick flashes
The default application is starting
up.
10 sec. on, .1 sec. off, 10 sec. on .1 sec. off
...
The default application is running.