User`s manual

NPort S8000 Series Basic Settings and Device Server Configuration
5-13
ATTENTION
Delimiter 2 is optional. If left blank, then Delimiter 1 alone trips clearing of the buffer.
If the size of the serial
data received is greater than 1 KB, the NPort will automatically pack the data and send it to the
Ethernet.
However, to use the delimiter function, you must at least enable Delimiter 1. If Delimiter 1 is left blank and
Delimiter 2 is enabled, the delimiter function will not work properly.
Delimiter process
Setting Factory Default Necessity
Do nothing
Delimiter + 1
Delimiter + 2
Strip Delimiter
Do Nothing Optional
[Delimiter + 1] or [Delimiter + 2]: The data will be transmitted when an additional byte (for Delimiter +1), or
an additional 2 bytes (for Delimiter +2) of data is received after receiving the Delimiter.
[Strip Delimiter]: When the Delimiter is received, the Delimiter is deleted (i.e., stripped), and the remaining
data is transmitted.
[Do nothing]: The data will be transmitted when the Delimiter is received.
Force transmit
Setting Factory Default Necessity
0 to 65535 ms 0 ms Optional
0: Disable the force transmit timeout.
1 to 65535: Forces the NPort’s TCP/IP protocol software to try to pack serial data received during the specified
time into the same data frame.
This parameter defines the time interval during which the NPort fetches the serial data from its internal buffer.
If data is incoming through the serial port, the NPort stores the data in the internal buffer. The NPort transmits
data stored in the buffer via TCP/IP, but only if the internal buffer is full or if the force transmit time interval
reaches the time specified under Force Transmit timeout.
Optimal force transmit timeout differs according to your application, but it must be at least larger than one
character interval within the specified baudrate. For example, assume that the serial port is set to 1200 bps, 8
data bits, 1 stop bit, and no parity. In this case, the total number of bits needed to send a character is 10 bits,
and the time required to transfer one character is
10 (bits) / 1200 (bits/s) * 1000 (ms/s) = 8.3 ms.
Therefore, you should set Force Transmit timeout to be larger than 8.3 ms. Force Transmit timeout is specified
in milliseconds and must be larger than 10 ms.
If the user wants to send the series of characters in a packet, the serial device attached to the NPort should
send characters without time delay larger than Force Transmit timeout between characters and the total length
of data must be smaller than or equal to the NPort’s internal buffer size. The serial communication buffer size
of the NPort is 1 Kbytes per port.
Parameter Copy
Apply the above setting to other serial ports, you may use the checkboxes at the bottom of the window to apply
the settings to one or more ports.