NPort 5000 Series User Manual
Parameter Setting
Default
Description Necessity
Max
Connection
1 ~ 8
(1 to 4 for the
NPort 5100/
NPort 5200/
NPort 5400
Series)
1
Max connection is set to 2 to 8 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 full control.
Max. Connection 1: Allows only 1 host’s Real
COM driver to open the specific NPort serial
port.
Max Connection 2 to 8: Allows 2 to 8 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 the settings of 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.
Required
Ignore
jammed IP
No or Yes No
No: 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.
Yes: 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
hosts.
Optional
Allow Driver
Control
No or Yes No
If “max connection” is greater than 1, the NPort
will ignore driver control commands from all
connected hosts. However, if you set “Allow
driver control” to Yes, control commands will be
accepted. Note that since the NPort may get
configuration changes from multiple hosts, the
most recent command received will take
precedence.
Optional
Packing length 0 to 1024 0
0: The Delimiter Process will be followed,
regardless of the length of the data packet.
Greater than 0: If the data length (in bytes)
matches the configured value, the data will be
Optional
Delimiter 1 00 to FF None
Once the NPort receives both delimiters through
its serial port, it immediately packs all data
currently in its buffer and sends it to the NPort’s
Ethernet port.
Optional
Delimiter 2 00 to FF None Optional
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