Issue
EGX300 with firmware 4.450 does not plot demand properly on the gateway site.  It shows demand as negative values at times.

Product Line
EGX300

Environment
EGX site
EGX disk image

Cause
The EGX300 is incorrectly calculating demand as cumulative data i.e. it tries to calculate interval data by subtracting the last data record with the current data record.  This incorrect calculation causes some demand values to drop to negative numbers if the previous interval's demand is higher than the current one.

Resolution
*Warning: The firmware utilities listed here can cause permanent damage to your product if applied incorrectly. Before downloading any firmware updates, verify the firmware you are downloading is appropriate for the specific model number of your product. If you have any doubts, contact Technical Support for guidance.*

*Warning: Devices should be disconnected from all monitoring software before performing a firmware upgrade*

This has been corrected in the latest EGX300 firmware update. Update the EGX300 firmware and apply the disk update attached below.

NOTE: FA212757 describes how to upgrade the firmware via command prompt using FTP

Released for:Schneider Electric Australia