Troubleshooting and technical support, Troubleshooting checklist – Comtrol Modbus Server User 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.
•
•
•
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If you cannot diagnose the problem, you can contact
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.