NPort 5200 Series User’s Manual
Web Console Configuration
5-12
Max connection
is usually used when the user needs to receive data from different hosts
simultaneously. The factory default is 1. In this case, only one specific host can access this port of
the NPort 5200, and the Real COM driver on that host will have full control over the port.
Max. connection 1:
Allows only 1 host’s Real COM driver to open the specific NPort 5200 serial port.
Max connection 2 to 4:
Allows 2 to 4 host’s Real COM drivers to open the specific NPort 5200 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 the firmware settings, instead of depending 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 5200 from the Ethernet
interface.
ATTENTION
When Max connection is set to 2, 3, or 4, this means that NPort 5200 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 5200 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
5200’s console setting, data communication may not work properly.
Ignore jammed IP
Setting
Factory Default
Necessity
No or Yes
No
Required
For previous versions of NPort 5200, when Max connections > 1, and the serial device is
transmitting data, if any one of the connected hosts was not responding NPort 5200 would wait
until the data had been transmitted successfully before transmitting the second group of data to all
hosts. For the current version of NPort 5200, 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.
Allow driver control
Setting
Factory Default
Necessity
No or Yes
No
Required
If “max connection” is greater than 1, 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 NPort 5200 may get configuration changes from multiple hosts, the most
recent command received will take precedence.
Packing length
Setting
Factory Default
Necessity
0 to 1024
0
Required
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.
