The difference between a serial port buffer and serial data log is listed in the following table:
||Serial Port Buffer
||Serial Data Log
||When the network connection (Ethernet or WLAN) goes down, the data from NPort’s serial ports is stored in the devices. After the network connection recovers, the NPort devices send the data sequentially to the destination. With this feature, you don’t need to worry about data loss when a network connection drops.
||NPort devices will record the events on the serial ports in log files that are stored in the system RAM. You can download these log files to get information on serial port events.
||Raw data from the serial ports
||Text (*.txt) file
* The NPort W2250A Series has 2 serial ports that share 20 MB of port buffer space, which means each port can save up to 10 MB of raw serial data when the network connection goes down.