User Manual

NPort W2250/2150 Plus User’s Manual Web Console Configuration
5-18
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
than or equal to 10 ms.
If you want to send a series of characters in the same packet, the serial device attached to NPort
W2250/2150 should send that series of characters during a time interval less than the Force
transmit timeout, and the total length of data must be less than or equal to NPort W2250/2150’s
internal buffer size. The serial communication buffer size for NPort W2250/2150 is 1 KB per port.
TCP Client Mode
Destination IP address 1/2/3/4
Setting Factory Default Necessity
IP address or Domain Name None Required
ATTENTION
Inactivity time is ONLY active when “TCP connect on” is set to “Any character.”