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NPort 5400 Series User’s Manual Web Console Configuration
5-12
1 to 99 min: NPort automatically closes TCP connection if there is no TCP activity for the given
time. After the connection is closed, NPort starts listening for another Real COM driver’s
connection from another host.
Max Connection
Setting Factory Default Necessity
1, 2, 3, 4 1 Required
Max Connection is usually used when the user needs to receive data from different hosts
simultaneously. The factory default only allows 1 connection at a same. When Max Connection is
set to 1, the Real COM driver on the specific host has the full control.
Max. Connection 1:
Allows only 1 host’s Real COM driver to open the specific NPort serial port.
Max Connection 2 to 4:
Allows 2 to 4 host’s Real COM drivers to open the specific NPort serial port, at the same time.
When multiple hosts’ Real COM drivers open the serial port at the same time, the COM driver
only provides a pure data tunnel without control ability. That is, this serial port parameter will use
firmware’s settings, not depend on your application program (AP).
Application software that is based on the COM driver will receive a driver response of “success”
when the software uses any of the Win32 API functions. The firmware will only send the data
back to the driver on the host.
Data will be sent first-in-first-out when data comes into the NPort from the Ethernet interface.
ATTENTION
When Max connection is set to 2, 3, or 4, this means that NPort will be using 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 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’s console setting, data
communication may not work properly.
Ignore jammed IP
Setting Factory Default Necessity
No or Yes No Optional
Previously, when Max connections > 1, and the serial device is transmitting data, if any one of the
connected hosts is not responding, it will wait until the data has been transmitted successfully
before transmitting the second group of data to all hosts. Currently, if you select Yes for “Ignore
jammed IP,” the host that is not responding will be ignored, but the data will still be transmitted to
the other hosts.
Packing length
Setting Factory Default Necessity
0 to 1024 0 Optional
Default = 0, The Delimiter Process will be followed, regardless of the length of the data packet. If
the data length (in bytes) matches the configured value, the data will be forced out. The data length
can be configured for 0 to 1024 bytes. Set to 0 if you do not need to limit the length.