NPort W2150A-W4/W2250A-W4 Series User Manual
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Auto Network Re-Connection
: With this option enabled, the driver will repeatedly attempt to re-
establish the TCP connection if the NPort does not respond to background “check-alive” packets
Always Accept Open Requests:
When enabled, the NPort driver will always accept requests to open a
virtual COM port, even if communications with the device can not be established. With this option, the
NPort driver will open a virtual COM port on the system even if the port is blocked or the Ethernet
connection is disabled. If this is the case, the connected device will not receive and transmit data even
though the system has opened a virtual COM port.
Drop Writing Data if Network Connection is Lost:
This function will assure the data to be kept in
the buffer or dropped when network connection is lost. The buffer size is 4 KBytes.
Return error if network is unavailable
: If this option is disabled, the driver will not return any error
even when a connection cannot be established to the NPort. With this option enabled, calling the Win32
Comm function will cause the error return code
“
STATUS_NETWORK_UNREACHABLE” when a
connection cannot be established to the NPort. This usually means that your host’s network connection
is down, perhaps because of a cable being disconnected. However, if you can reach other network
devices, maybe the NPort is not powered on or is disconnected. Not that
Auto Network Re-
Connection
must be enabled in order to use this function.
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.
4.
On the
Serial Parameters
tab, specify the communication settings that the host will use when opening
the COM port.
