8
8.
Troubleshooting
In this chapter, we discuss the common PCI Express Series problems and possible solutions. If you still have
problems after reading this chapter, contact your dealer or Moxa for help, or use the Problem Report Form at
the end of this manual to report problems to your dealer.
1.
The Moxa PCI Express board cannot be detected by the Moxa driver while installing the driver.
Hardware causes and solutions:
a.
Express slot. It is also possible that a slot has malfunctioned. In this case, try other slots until you find
one that works.
b.
The motherboard does not have an available IRQ for the PCI Express board. In this case, enter the BIOS
and make sure there is an available IRQ under PCI/PnP settings.
2.
The Moxa PCI Express board and driver are activated but cannot transfer (transmit/receive)
data.
Hardware Causes and Solutions:
a.
Make sure the cable wiring is connected correctly. Refer to the “Pin Assignments” chapter for correct
cable connections.
b.
The cable or the board could be defective. Try other ports, cables, or boards to verify this, or use the
PComm Diagnostic utility to test the Moxa board and port conditions. If the Diagnostic program reports
an error, replace the faulty components.
Software Causes and Solutions:
a.
PCI Express Series boards will check the line status (CTS) before transmitting data if the RTS/CTS flow
control feature is set to Enable in the configuration or application program. Refer to the “Connection
Cables and Cable Wiring” chapter for proper wiring diagrams; then, check the line status of the
suspected port, using the diagnostics LED indicators on the mini tester.
b.
The board control application may not be written correctly according to the corresponding API of the
operating system. To check this problem, run another application that you know is correct, or use the
utilities provided by Moxa (such as PComm Terminal emulator or HyperTerminal that runs under
Windows platform).
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