NPort 5600 Series User’s Manual
Web Console Configuration
5-32
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 5600 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
Del 1
Del 2
Strip Delimiter
Do Nothing
Optional
[Del 1] or [Del 2]: The data will be transmitted when an additional byte (for
Del1), or an additional 2 bytes (for Del2) 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 5600’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 NPort 5600 fetches the serial data from its
internal buffer. If data is incoming through the serial port, NPort 5600 stores the data in the
internal buffer. NPort 5600 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.
The optimal Force transmit timeout depends on 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, so in this case, it must
be greater than or equal to 10 ms.
If the user wants to send a series of characters in the same packet, the serial device attached to
NPort 5600 should send that series of characters during a time interval less than the Force transmit
timeout for NPort 5600, and the total length of data must be less than or equal to NPort 5600’s
internal buffer size. The serial communication buffer size for NPort 5600 is 1 KB per port.
