The summertime bit is used to indicate that summertime (day light saving) is being used and, more
importantly, to resolve the alias and time discontinuity which occurs when summertime starts and ends. This
is important for the correct time correlation of time stamped records.
The day of the week field is optional and if not calculated will be set to zero.
The concept of time zone is not catered for by this data type and hence by the relay. It is up to the end user
to determine the time zone. Normal practice is to use UTC (universal co-ordinated time).
9.11 POWER AND ENERGY MEASUREMENT DATA FORMATS
The power and energy measurements are available in the Data Type G31 format. This uses two registers
and is listed in the DISTURBANCE RECORDER column of the Courier database.
Data Type G31
Two Register Analogue Channel Assignment Selector
Related to Number
0x00000001 VxN Z1
0x00000002 VxN Z2
0x00000004 VxN Z3
0x00000008 VxN Z4
0x00000010 IX-T1
0x00000020 IX-T2
0x00000040 IX-T3
0x00000080 IX-T4
0x00000100 IX-T5
0x00000200 IX-T6
0x00000400 IX-T7
0x00000800 IX-T8
0x00001000 IX-T9
0x00002000 IX-T10
0x00004000 IX-T11
0x00008000 IX-T12
0x00010000 IX-T13
0x00020000 IX-T14
0x00040000 IX-T15
0x00080000 IX-T16
0x00100000 IX-T17
0x00200000 IX-T18
Chapter 7 - SCADA Communications MiCOM P747
222 P747-TM-EN-1
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