Time zone and daylight saving time conversions

The time zone associated with meter data can be stored in different ways depending on the system of storage. Here are some key points to understand:

• Time representation in IEE is based on the Workgroup time zone setting. 

• Data exported from IEE is based on time zone specified in the task templates.

• IEE does not adjust for Daylight Saving Time (DST). This is implied based on the time zone for the meter entity. 

The MV90 Recording Device has a field for time zone adjustment. This field is used exclusively by xiComm when comparing meter time against system time and time set functions.

The following graphic and table follow the path of collected data through Service Mode and C&I solutions and how that data is interpreted during the import process.

Table 92 Collected data through Service Mode and C&I solutions

Data Element	Data Source	Time zone of data stored in Service Mode/MV90 xi	Data exported from Service Mode /MV90 xi	Time zone used on import in IEE	Time zone stored in IEE
Interval Data	TIM module	Meter	Standard time of the meter time zone	Recording Device	UTC
Register Data Reading End Time	TIM module	Service Mode System time	Standard time of system time zone	Standard time of External System	UTC
Time Stamp Decoded Registers	TIM/Decode	Meter time (as-decoded)	Meter time	Imported as-is	As-decoded (not UTC)
Event Data/Event Time	TIM module	Meter	Meter	Recording Device	UTC
Event Data Received Time	TIM module	Meter	Meter	Recording Device	UTC
Comm Log Time Values	TIM module	System	System	External System	UTC
Interval Data	MDEF	NA	Meter standard time	Recording Device or External System	UTC