GE EPM 9650/9800 manual Historical Log 2 Record Size, Historical Log 2 Data Pointers

Historical Log 2 Record Size: (45464)

This Register is an enumeration for the size of a record in the Historical Log. The valid values are:

0x00000 = 32 byte records

0x00001 = 64 byte records

0x00002 = 128 byte records

0x00003 = 256 byte records

0x00004 = 16 byte records

Historical Log 2 Data Pointers: (45333-45460)

These Registers indicate which information to include in a record in the Historical Log. Each Data Pointer has the following 4 (four) byte structure:

Size	Format	Description
2 byte	unsigned int	Line Number
1 byte	unsigned char	Point number
1 byte	unsigned char	Reserved

A Line Number is an index into the Communication Table. Example - Line Number 11 is for the 12th line in the Communication Table, 0.1 second Phase-to-Neutral Voltages. Data Pointers with Line Numbers greater than the number of lines in the table are ignored.

A Point Number is an index into the Communication Table.

Example: Point Number 1 is for the second entry in a Line. Line Number 11, Point Number 1 is the second in the twelfth line, 0.1 second VBN. Data Pointers with Point Numbers greater than the number of points for the line are ignored.

Record Format: A Record contains as many bytes as specified by the Historical Log 2 Record Size Field in the Programmable Settings Block (45464). The first eight bytes in each record is the Time Stamp. The format of the Time Stamp is:

Byte		Format	Range	Description
	0	binary	0 – 99	century
1		binary	0 – 99	year
2		binary	1 – 12	month
3		binary	1 – 31	day
4		binary	0 – 23	hour
5		binary	0 – 59	minute
6		binary	0 – 59	second
7		binary	0 – 100	centisecond

If this historical record was recorded while the meter was in test mode, then only energy readings will be recorded. All other values requested will be stored with the byte values of 0x055. The most significant bit of the centisecond byte indicates whether this record was recorded while the meter was in test mode.

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