NPort 5100A Series Configuring NPort Administrator
milliseconds) than a native COM1, because it needs to work via Ethernet. That’s why the native COM
ports on the motherboard can work fast with this function call, but the NPort requires much more time.
In order to accommodate other applications that require a faster response time, the new NPort driver
implements a new “Fast Flush” option. Note that by default, this function is disabled.
• To begin with, make sure there are some “PurgeComm()” functions being used in your application
program. In this kind of situation, you might find that your NPort exhibits a much poorer operation
performance than when using the native COM1 port. Once you have enabled the “Fast Flush” function,
you can check to see if there has been an improvement in performance.
• By default, the optional “Fast Flush” function is disabled. If you would like to enable this function, from
“NPort Administrator” double click the COM ports that are mapped to the NPort, and then select the
“Fast Flush” checkbox. You should find that when “Fast Flush” is enabled, the NPort driver will work
faster with “PurgeComm().”
8. The Serial Parameter settings shown here are the default settings when the NPort 5100A is powered on.
However, the program can redefine the serial parameters to different values after the program opens the
port via the Win 32 API.
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