User manual

NPort 5000AI-M12 Series Web Console Configuration
5-20
ATTENTION
Delimiter 2 is
optional. If left blank, then Delimiter 1 alone trips clearing of the buffer.
If the size of the serial
data received is greater than 1 KB, the NPort
5000AI-M12
will automatically pack the data and send it to the
Ethernet.
However, to use the delimiter function, you must at least enable Delimiter 1. If Delimiter 1 is left
blank and Delimiter 2 is enabled, the delimiter function will not work properly.
Delimiter process
Setting Factory Default Necessity
Do Nothing,
Delimiter + 1,
Delimiter + 2,
Strip Delimiter
Do Nothing Optional
Delimiter + 1 or Delimiter + 2: The data will be transmitted when an additional byte (for Delimiter +1), or
an additional 2 bytes (for Delimiter +2) of data is received after receiving the Delimiter.
Strip Delimiter: When the Delimiter is received, the Delimiter is deleted (i.e., stripped), and the remaining
data is transmitted.
Do Nothing: The data will be transmitted when the Delimiter is received.
Force transmit
Setting Factory Default Necessity
0 to 65535 ms 0 ms Optional
0: Disable the force transmit timeout.
1 to 65535: Forces the NPort 5000AI-M12’s TCP/IP protocol software to try to pack serial data received during
the specified time into the same data frame.
This parameter defines the time interval during which the NPort 5000AI-M12 fetches the serial data from its
internal buffer. If data is incoming through the serial port, the NPort 5000AI-M12 stores the data in the internal
buffer. The NPort 5000AI-M12 transmits data stored in the buffer via TCP/IP, but only if the internal buffer is
full or if the Force transmit time interval reaches the time specified under Force transmit timeout.
The optimal Force transmit timeout depends on your application, but it must be at least larger than one
character interval within the specified baudrate. For example, assume that the serial port is set to 1200 bps, 8
data bits, 1 stop bit, and no parity. In this case, the total number of bits needed to send a character is 10 bits,
and the time required to transfer one character is
(10 (bits) / 1200 (bits/s)) * 1000 (ms/s) = 8.3 ms.
Therefore, you should set Force transmit timeout to be larger than 8.3 ms, so in this case, it must be greater
than or equal to 10 ms.
If the user wants to send a series of characters in the same packet, the serial device attached to the NPort
5000AI-M12 should send that series of characters during a time interval less than the Force transmit timeout
for the NPort 5000AI-M12, and the total length of data must be less than or equal to the NPort 5000AI-M12’s
internal buffer size. The serial communication buffer size for the NPort 5000AI-M12 is 1 KB per port.
Local TCP port
Setting Factory Default Necessity
1 to 65535
4001
Required
The Local TCP port is the TCP port that the NPort 5000AI-M12 uses to listen to connections, and that other
devices must use to contact the NPort 5000AI-M12. To avoid conflicts with well known TCP ports, the default
is set to 4001.
Command port
Setting
Factory Default
Necessity