User`s manual

6-2 Intellio C320Turbo User's Manual
e. Sometimes it happens when the total consumption of power in the system is
higher than the power supply can provide. Especially when many interface
boards including board(s) are plugged in the system. It is recommended to
replace the current power supply with higher watt one. Or choose the external
power option if Intellio C320Turbo is used.
Software Causes and Solutions:
a. Under DOS/Windows 3.x system, you may have selected a base address that
conflicts with other driver such as EMM386 or QEMM386 memory management
software. If so, reserve 16K bytes space for C320Turbo, e.g. using “X = C800-
CBFF” option in EMM386/QEMM386 command line of file CONFIG.SYS.
b. The base address switch setting on board is not the same as the setting in
configuration software.
2. MOXA board found but can not transfer data.
Hardware Causes and Solutions:
a. Check if wrong cable wiring. Refer to previous chapter ”Connection Option and
Cable wiring” for precise pin assignment of the connector type you are using.
b. Cable or external module is defective.
c. IRQ is used or reserved by PCI bus.
Software Causes and Solutions:
a. C320Turbo will always check line status (CTS/DSR) before it sends data out if
RTS/CTS flow control feature is set to ON in configuration or application program.
Please see previous chapter “Connection Option and Cable Wiring” for proper
wiring.
Check the lines of the suspect port using the diagnostic LED indicators on the
Basic Module if Intellio C320Turbo is used.
b. Perhaps the application controlling MOXA 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 95/98, “Hyperterminal” is good for testing COM ports. Under
UNIX, “stty”, “cat”, or “getty” is existing program for testing tty port.