NPort 5400 Series User’s Manual | Web Console Configuration |
If the value of inactivity time is set to 0, the current TCP connection is maintained until there is connection close request. Although inactivity time is disabled, the NPort will check the connection status between the NPort and remote host by sending “keep alive” packets periodically. If the remote host does not respond to the packet, it assumes that the connection was closed down unintentionally. The NPort will then force the existing TCP connection to close.
ATTENTION
The Inactivity time should at least be set 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 is completed.
Max Connection
Setting | Factory Default | Necessity |
1, 2, 3, 4 | 1 | Required |
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Max Connection is usually used when the user needs to receive data from different hosts simultaneously. The factory default only allows 1 connection at a time.
Max. Connection 1:
The NPort only allows 1 host to open the TCP connection to the specific serial port.
Max Connection 2 to 4:
Allows 2 to 4 host’s TCP connection request to open the specific NPort serial port, at the same time. When multiple hosts establish a TCP connection to the specific serial port at the same time, the NPort will duplicate the serial data and transmit to all of the hosts. Ethernet data is sent on a
Ignore jammed IP
Setting | Factory Default | Necessity |
No or Yes | No | Optional |
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Previously, when Max connections > 1, and the serial device is transmitting data, if any one of the connected hosts is not responding, it will wait until the data has been transmitted successfully before transmitting the second group of data to all hosts. Currently, 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 | Optional |
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If “max connection” is greater than 1, the 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 the NPort 5400 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 | Optional |
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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.
