How Elipse Software products work during Daylight Saving Time.

Question:

What should be done to set up Elipse Software’s products for Daylight Saving Time?

Solution:

If Automatically set up for Daylight Saving Time option is checked, no other arrangement has to be made. If it’s unchecked, follow these procedures, according to the product being used.

Elipse E3 / Elipse Power

Data are recorded according to the computer’s time (natively, because it’s possible to allocate a tag to report data when using a Historic).

At the beginning of DST, stored data are advanced in one hour (from 23:59:59 to 01:00:01).

At the end of DST, when time is adjusted one hour backward, one of the following situations will take place:

  • If the Historic’s E3TimeStamp field is a primary key, the system won’t record data with the same E3TimeStamp as a previous record.
  • If the Historic’s E3TimeStamp field is not a primary key, a few records may have the same date.

Elipse Plant Manager (EPM)

This system won’t present any issues at the beginning or at the end of DST, because it uses UTC time (however, queries to E3 or in EPM’s Function must set up @timeZoneOffset parameter as needed).

Elipse SCADA

At the beginning of DST, stored data will be advanced in one hour (from 23:59:59 to 01:00:01). At the end of DST, a few records may have the same date, because Elipse SCADA uses the computer’s timestamp.

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