User's Manual

NPort W2150A/W2250A Series Web Console: Serial Port Settings
7-5
Max connection
Default 1
Options 1 to 8
Description This field specifies the maximum number of connections that will be accepted by the serial
port.
1: Only one specific host can access this serial port, and the RealCOM driver on that host will
have full control over the port.
2 to 8: This serial port will allow the specified number of connections to be opened
simultaneously. With simultaneous connections, the RealCOM driver will only provide a pure
data tunnel with no control ability. The serial communication will be determined by the NPort
rather than by your application program. Application software that is based on the RealCOM
driver will receive a driver response of “success” when using any of the Win32 API functions.
The NPort will send data only to the RealCOM driver on the host. Data received from hosts will
be sent to the attached serial device on a first-in-first-out basis.
ATTENTION
When Max connection is 2 or greater, the serial port’s communication settings (i.e., baudrate, parity, data bits,
etc.) will be determined by the NPort. Any host that opens the COM port connection must use identical serial
communication settings.
Ignore jammed IP
Default Disable
Options Disable, Enable
Description This field specifies how an unresponsive IP address is handled when there are simultaneous
connections to the serial port.
Disable: All transmission will be suspended if one IP address becomes unresponsive.
Transmission will only resume when all hosts have responded.
Enable: Data transmission to the other hosts will not be suspended if one IP address becomes
unresponsive.
Allow driver control
Default Disable
Options Disable, Enable
Description This field specifies how the port will proceed if driver control commands are received from
multiple hosts that are connected to the port.
Disable: Driver control commands will be ignored.
Enable: Control commands will be accepted, with the most recent command received taking
precedence.