NPort 6000 Series Configuring Serial Port Operation Modes
Packet length (default=0): The packet length setting refers to the maximum amount of data that is allowed
to accumulate in the serial port buffer before sending. At the default of 0 for packet length, no maximum
amount is specified and data in the buffer will be sent as specified by the delimiter settings or when the buffer
is full. When a packet length between 1 and 1024 bytes is specified, data in the buffer will be sent as soon it
reaches the specified length.
Delimiter 1 and Delimiter 2 (default=None): When Delimiter 1 is enabled, the serial port will clear the
buffer and send the data to the Ethernet port when a specific character, entered in hex format, is received. A
second delimiter character may be enabled and specified in the Delimiter 2 field, so that both characters act as
the delimiter to indicate when data should be sent.
ATTENTION
In order to enable a delimiter,
the packet length must be set to 0. Delimiter 2 should only be enabled in
conjunction with Delimiter 1 and never on its own; otherwise
, data errors may occur
. Even when a delimiter
is
enabled, the NPort 6000 will still pack and send the data when the amount of data exceeds 1 KB.
Delimiter process (default=Do Nothing): The delimiter process field determines how the data is handled
when a delimiter is received. Delimiter 1 must be enabled for this field to have an effect. If Delimiters 1 and 2
are both enabled, both characters must be received for the delimiter process to take place.
• Do Nothing: Data in the buffer will be transmitted when the delimiter is received.
• Delimiter + 1: Data in the buffer will be transmitted after one additional byte is received following the
delimiter.
• Delimiter + 2: Data in the buffer will be transmitted after two additional bytes are received following the
delimiter.
• Strip Delimiter: Data in the buffer is first stripped of the delimiter before being transmitted.
Force transmit (default=0 ms): This parameter defines how large a gap in serial communication the NPort
6000 will allow before packing the serial data in its internal buffer for network transmission.
Socket Applications
TCP Server Mode
TCP alive check time (default=7 min.): This field specifies how long the NPort 6000 will wait for a response
to keep-alive packets before closing the TCP connection. The NPort 6000 checks connection status by sending
periodic keep-alive packets. If the remote host does not respond to the packet within the time specified in this
field, the NPort 6000 will force the existing TCP connection to close. For socket and device control modes, the
NPort 6000 will listen for another TCP connection from another host after closing the connection. If TCP alive
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