NPort W2150A-W4/W2250A-W4 Series User Manual
64
Settings for Real COM Mode
When
Operation
Mode
is set to Real COM on a serial port’s
Operation Modes
page, you will configure
additional settings including
TCP alive check time
,
Max connection
,
Ignore jammed IP, Allow driver
Control, Connection goes down, Packet length, Delimiter 1, Delimiter 2, Delimiter process,
and
Force transmit.
TCP Alive Check Time
Default
7 min
Options
0 to 99 min
Description
This field specifies how long the NPort will wait for a response to “keep-alive” packets
before closing the TCP connection. The NPort checks connection status by sending periodic
“keep- alive” packets.
0: The TCP connection will remain open even if there is no response to the “keep-alive”
packets.
1 to 99: If the remote host does not respond to the packet within the specified time, the
NPort will force the existing TCP connection to close.
Max connection
Default
1
Options
1 to 8
Description
This field specifies the maximum number of connections the serial port will accept.
1: Only one specific host can access this serial port, and the Real COM 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 Real COM 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 Real COM driver will receive a driver response of “success” when using any of the
Win32 API functions. The NPort will send data only to the Real COM driver on the host.
Data received from hosts will be sent to the attached serial device on a first-in-first-out
basis.
