Is it possible to read and log data in smaller intervals than 1 second?
Yes definitely, if you can poll your data source that fast. I've successfully read and logged data down to 25ms with a Mango TCP/IP.
Thanks @mihairosu for sharing! Did you mean Modbus TCP/IP, or was it a TCP/IP data source?
As was said, yes you can poll or record data with millisecond precision. Sub-millisecond data is not supported, and would really have to be collected and timestamped at the point of measurement.
Your actual limitation will be determined by the data source type, most likely.
Oops, yes I meant to say Modbus TCP/IP from Click PLCs, haha.