# Embeded- guaranteed logging rates

The native ME Data Log supports a 10ms minimum scan rate. The maximum guaranteed precision that the Data Logger can provide is at 20ms for the data.

Pick practical scan rates for your application no matter you choose DataStorePlus ActiveX Control or Data Log Model. As the network speed and bandwidth will determine how fast you are able to update your tags.

If you need to capture data which is changing in the PLC at one second interval, you need to set the scan rate at 500ms. This way you can guarantee its one second data capture precision. In this example, you can only choose the built-in ME Data Log.

If you need to capture data which is changing in the PLC at a five second interval, you need to set the scan rate at about 2.5 seconds. This will guarantee the data being captured with a precision of five seconds. In this example, you could choose either.

## See also

Configure how the data being collected is stored in a log file