User's Manual

NPort W2150A/W2250A Series Web Console: Serial Port Settings
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Delimiter 1 and 2
Default Disabled
Options Disabled, Enabled, 00 to FF
Description These fields are used to define special delimiter character(s) for data packing. Enable
Delimiter 1 to control data packing with a single character; enable both Delimiter 1 and 2
to control data packing with two characters received in sequence.
When these fields are enabled, serial data will accumulate in the serial port’s buffer until
the buffer is full or until the specified delimiter character(s) are received. For example, the
carriage-return character could be used as a delimiter in order to transmit each sentence
or paragraph in a separate packet. Data will be packed according to Delimiter process.
Delimiters must be incorporated into the data stream at the software or device level.
ATTENTION
When Delimiter 1 is enabled, Packet length must be set to 0.
Delimiter process
Default Do Nothing
Options Do Nothing, Delimiter + 1, Delimiter + 2, Strip Delimiter
Description This field specifies how data is packed when delimiter characters are received. This field
has no effect if Delimiter 1 is not enabled.
Do nothing: Data accumulated in the serial port’s buffer will be packed, including
delimiters.
Delimiter + 1: One additional character must be received before the data in the serial
port’s buffer is packed.
Delimiter + 2: Two additional characters must be received before the data in the serial
port’s buffer is packed.
Strip Delimiter: Data accumulated in the serial port’s buffer will be packed, but the
delimiter character(s) will be stripped from the data.
Force transmit
Default 0 ms
Options 0 to 65535
Description This field controls data packing by the amount of time that elapses between bits of data.
When using this field, make sure that Inactivity time is disabled or set to a larger value.
Otherwise the connection may be closed before the data in the buffer can be transmitted.
0: If serial data is not received, the NPort will wait indefinitely for additional data.
1 to 65535: If serial data is not received for the specified amount of time, the data that is
currently in the buffer will be packed for network transmission. The optimal force transmit
time 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
8.3 ms, so the force transmit time to be larger than 8.3 ms.