NPort 6000 Series Software Installation/Configuration
Return error if network is unavailable
If this option is disabled, the driver will not return any errors even when a connection cannot be established
to the NPort 6000. With this option enabled, calling the Win32 Comm function will result in the error return
code “STATUS_NETWORK_UNREACHABLE” when a connection cannot be established to the NPort 6000.
This usually means that your host’s network connection is down, perhaps due to a cable being disconnected.
However, if you can reach other network devices, it may be that the NPort 6000 is not powered on or is
disconnected. Note that Auto Network Re-Connection must be enabled in order to use this function.
Fast Flush (only flushes the local buffer)
For some applications, the user’s program will use the Win32 “PurgeComm()” function before it reads or
writes data. After a program uses this PurgeComm() function, the NPort driver continues to query the
NPort’s firmware several times to make sure no data is queued in the NPort’s firmware buffer, rather than
just flushing the local buffer. This design is used to satisfy some special considerations. However, it may
take more time (about several hundred milliseconds) than a native COM1 due to the additional time spent
communicating across the Ethernet. This is why PurgeComm() works significantly faster with native COM
ports on the PC than with mapped COM ports on the NPort 6000. In order to accommodate other
applications that require a faster response time, the new NPort driver implements a new Fast Flush option.
By default, this function is enabled.
If you have disabled Fast Flush and find that COM ports mapped to the NPort 6000 perform markedly slower
than when using a native COM port, try to verify if “PurgeComm()” functions are used in your application.
If so, try enabling the Fast Flush function and see if there is a significant improvement in performance.
Ignore TX Purge
Applications can use the Win32 API PurgeComm to clear the output buffer. Outstanding overlapping write
operations will be terminated. Select the Ignore TX Purge checkbox to ignore the effect on output data.
ndows Driver Manager v1.19 supports MOXA OnCell series; the Enable Auto IP Report
Advance setting only supports OnCell products.
3. The Serial Parameters window in the following figure shows the default settings when the NPort 6000 is
powered on. However, the program can redefine the serial parameters to different values after the program
opens the port via Win 32 API.
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