User's Manual Part 1

NPort W2004 User’s Manual Web Console Configuration
5-13
ATTENTION
The Inactivity time should be set at least larger than that of Force transmit timeout. To prevent
the unintended loss of data due to the session being disconnected, it is highly recommended that
this value is set large enough so that the intended data transfer can be completed.
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 is 1. In this case, only one specific host can access this port of
the NPort W2004, 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 W2004 serial port.
Max connection 2 to 4:
Allows 2 to 4 host’s Real COM drivers to open the specific NPort W2004 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 tunneling without control ability.
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 W2004 from the Ethernet
interface.
ATTENTION
When Max connection is set to 2, 3, or 4, NPort W2004 will use 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 W2004 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 W2004’s console
setting, data communication may not work properly.
Data Packing
Delimiter 1/2
Setting Factory Default Necessity
00 to FF (hex) None Optional
Once the NPort W2004 receives both delimiters through its serial port, it immediately packs all
data currently in its buffer and sends it to the NPort W2004’s Ethernet port.