User`s manual

6-2 Intellio C218Turbo User's Manual
e. Your mother board does not have vacant IRQ for the C218Turbo. Make
sure the desired IRQ is available and not used by other ISA board or reserved
by PCI bus in PCI/PnP BIOS.
2. MOXA board and driver activated but can not transfer
(transmitting/receiving) data.
Hardware Causes and Solutions
a. Check messages issued by Moxa driver and make sure the driver is
successfully activated without any problem.
b. Check if wrong cable wiring. Refer to Chapter “Connection Options (Opt8x)
and Cable Wiring” for precise pin outs of the connector type you are using.
c. Cable, external box or board is defective. You may use other port, cable or
box or board to verify. In addition, PComm Utility “Diagnostics” for
Windows NT and Windows 95/98 or API-232 utility “Diagnostics” is good
for testing MOXA board and port condition. If the report of diagnostics
shows error, replace the error component.
d. Desired IRQ is used or reserved by PCI bus in PCI/PnP BIOS.
Software Causes and Solutions
a. C218Turbo will check line status (CTS) before it sends data out if
RTS/CTS flow control feature is set to “Enable” in configuration or
application program. Please see Chapter “Connection Options (Opt8x) and
Cable Wiring” for proper wiring. Check the line status of the suspected port
using the diagnostic LED indicators on the mini tester.
b. Perhaps the application controlling the board is not correctly written
according to the corresponding API of the operating system. To verify,
please run existing and known good application or Moxa provided utility.
For example, under Windows NT and Windows 95/98, PComm Utility
“Terminal emulator” or “Hyperterminal” is good for testing COM ports.
Under UNIX, “Terminal emulator” in the MOXA administration utility
“mxadm” and “stty”, “cat”, or “getty” are existed programs for testing tty
port.
c. IRQ settings of software and hardware do not match.