15 April 2021
This is an issue in the 1.x.xxx version of PM5500 firmware which was causing a File Status error condition and issue of occasional missing records in the data log. The device driver stops downloading on-board data logs after some time (approximately 2 months if the data logging interval is 15 minutes)
These issues have been fixed in FW V2.0.1. See FA299853
for how to upgrade the firmware.