User Manual

NPort W2250/2150 Plus User’s Manual Web Console Configuration
5-12
ATTENTION
When Max connection is set to 2, 3, or 4, NPort W2250/2150 will use a “multi connection
application” (i.e., 2, 3, or 4 hosts are allowed access to the port at the same time). When using a
multi connection application, NPort W2250/2150 will use the serial communication parameters
set in the console. All of the hosts connected to that port must use the same serial settings. If one
of the hosts opens the COM port with parameters that are different from NPort W2250/2150’s
console setting, data communication may not work properly.
Data Packing
Delimiter 1/2
Setting Factory Default Necessity
00 to FF (hex) None Optional
Once the NPort W2250/2150 receives both delimiters through its serial port, it immediately packs
all data currently in its buffer and sends it to the NPort W2250/2150’s Ethernet port.
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 W2250/2150 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.
Force transmit
Setting Factory Default Necessity
0 to 65535 ms 0 Optional
0: Disable force transmit timeout.
1 to 65535: Forces the NPort W2250/2150’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 W2250/2150 fetches the serial data
from its internal buffer. If data is incoming through the serial port, NPort W2250/2150 stores the
data in the internal buffer. NPort W2250/2150 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 baud rate. 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 to be larger than 8.3 ms, so in this case, it must be greater