Device Control Applications
Real COM Mode
multiple hosts’ Real COM drivers open the port at the same time, the COM driver only provides a pure data
tunnel—no control ability. The serial port parameters will use 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 data back to the driver on the host.
Data will be sent first-in-first-out when data comes into the CN2600 from the Ethernet interface.
ATTENTION
When Max connection is greater than 1, the CN2600 will use a multi connection application (i.e., 2 to 8 hosts
are allowed access to the port at the same time). When using a multi connection application, the CN2600 will
use the serial communication parameters as defined here in the web console, and all hosts connected to the
port must use identical serial settings. If one of the hosts opens the COM port with different serial settings, data
will not be transmitte
Ignore jammed IP (default=No): This option determines how the port will proceed if multiple hosts are
connected and one or more of the hosts stops responding as the port is transmitting data. If you select No, the
port will wait until the data has been transmitted successfully to all hosts before transmitting the next group of
data. If you select Yes, the port will ignore the host that stopped responding and continue data transmission
to the other hosts.
Allow driver control (default=No): This option determines how the port will proceed if driver control
commands are received from multiple hosts that are connected to the port. If No is selected, driver control
commands will be ignored. If Yes is selected, control commands will be accepted, with the most recent
command received taking precedence.
Connection goes down (default=always high): You can configure what happens to the RTS and DTR signals
when the Ethernet connection goes down. For some applications, serial devices need to know the Ethernet link
status through RTS or DTR signals sent through the serial port. Use goes low if you want the RTS and DTR
signal to change their state to low when the Ethernet connection goes down. Use always high if you do not
want the Ethernet connection status to affect the RTS or DTR signals.
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