User Manual
Table Of Contents
- Chapter 1 Introduction
- Chapter 2 Getting Started
- Chapter 3 Initial IP Configuration
- Chapter 4 Choosing the Proper Operation Mode
- Chapter 5 Web Console Configuration
- Chapter 6 Installing and Configuring the Software
- Appendix A SNMP Agents with MIB II & RS-232 Like Groups
- Appendix B Well Known Port Numbers
- Appendix C Federal Communication Commission Interference Statement
- Appendix D FCC Warning Statement
- Appendix E Service Information
NPort W2250/2150 Plus User’s Manual Web Console Configuration
5-20
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.
UDP Mode
Destination IP address 1
Setting Factory Default Necessity
Begin: Empty
End: Empty
IP address range
E.g. Begin: 192.168.1.1
End: 192.168.1.10
Port: 4001
Required
Destination IP address 2/3/4
Setting Factory Default Necessity
IP address range
E.g. Begin: 192.168.1.11
End: 192.168.1.20
Begin: Empty
Optional
Allows NPort W2250/2150 to connect actively to the remote host whose IP address is set by this
parameter.
Local Listen port
Setting Factory Default Necessity
1 to 65535 4001 Required
The UDP port that NPort listens to, and that other devices must use to contact NPort. To avoid
conflicts with well known UDP ports, the default is set to 4001.