GE 489 Communications Manual page 47

489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
Table CG–2: Data Formats (Sheet 2 of 14)
CODE TYPE
2's COMPLEMENT SIGNED VALUE
16 bits
1 DECIMAL PLACES
F5
Example: -123.4 stored as -1234 (i.e. 64302)
2's COMPLEMENT SIGNED VALUE
16 bits
2 DECIMAL PLACES
F6
Example: –12.34 stored as –1234 (i.e. 64302)
2's COMPLEMENT SIGNED LONG VALUE
32 bits
1 DECIMAL PLACE
1st 16 bits High Order Word of Long Value
F10
2nd 16 bits Low Order Word of Long Value
Example: –12345.6 stored as
–123456 (i.e. 1st word: FFFE hex, 2nd word: 1DC0 hex)
32 bits 2's COMPLEMENT SIGNED LONG VALUE
1st 16 bits High Order Word of Long Value
F12
2nd 16 bits Low Order Word of Long Value
Example: -123456 stored as -123456
(i.e. 1st word: FFFE hex, 2nd word: 1DC0 hex)
2's COMPLEMENT SIGNED LONG VALUE, 3
32 bits
DECIMAL PLACES
1st 16 bits High Order Word of Long Value
F13
2nd 16 bits Low Order Word of Long Value
Example: -123.456 stored as -123456
(i.e. 1st word: FFFE hex, 2nd word: 1DC0 hex)
2's COMPLEMENT SIGNED LONG VALUE, 2
32 bits
DECIMAL PLACES
1st 16 bits High Order Word of Long Value
F14
2nd 16 bits Low Order Word of Long Value
Example: -1234.56 stored as -123456
(i.e. 1st word: FFFE hex, 2nd word: 1DC0 hex)
16 bits HARDWARE REVISION
0000 0000 0000
1 = A
0001
0000 0000 0000
F15 2 = B
0010
... ...
0000 0000 0001
26 = Z
1010
16 bits SOFTWARE REVISION
1111 1111 Major Revision Number
xxxx xxxx 0 to 9 in steps of 1
F16
xxxx xxxx 1111 Minor Revision Number (two BCD digits)
1111 00 to 99 in steps of 1
Example: Revision 2.30 stored as 0230 hex
32 bits DATE (MM/DD/YYYY)
1st byte Month (1 to 12)
2nd byte Day (1 to 31)
F18
3rd & 4th byte Year (1995 to 2094)
Example: Feb. 20, 1996 stored as 34867148 (i.e. 1st word: 0214, 2nd
word 07CC)
32 bits TIME (HH:MM:SS:hh)
1st byte Hours (0 to 23)
2nd byte Minutes (0 to 59)
F19
3rd byte Seconds (0 to 59)
4th byte Hundredths of seconds (0 to 99)
Example: 2:05pm stored as 235208704 (i.e. 1st word: 0E05, 2nd word
0000)
32 bits 2's COMPLEMENT SIGNED LONG VALUE
1st 16 bits High Order Word of Long Value
F20
2nd 16 bits Low Order Word of Long Value
Note: -1 means "Never"
DEFINITION
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