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8 COMMUNICATIONS
Table 8–7: 745 DATA FORMATS (Sheet 31 of 35)
FORMAT
APPLICABLE BITS
CODE
0000 0000 0000 0010 2 = Logic Input 2
0000 0000 0000 0011 3 = Logic Input 3
0000 0000 0000 0100 4 = Logic Input 4
0000 0000 0000 0101 5 = Logic Input 5
0000 0000 0000 0110 6 = Logic Input 6
0000 0000 0000 0111 7 = Logic Input 7
0000 0000 0000 1000 8 = Logic Input 8
0000 0000 0000 1001 9 = Logic Input 9
0000 0000 0000 1010 10 = Logic Input 10
0000 0000 0000 1011 11 = Logic Input 11
0000 0000 0000 1100 12 = Logic Input 12
0000 0000 0000 1101 13 = Logic Input 13
0000 0000 0000 1110 14 = Logic Input 14
0000 0000 0000 1111 15 = Logic Input 15
0000 0000 0001 0000 16 = Logic Input 16
F89
16 bits
0000 0000 0000 0000 0 = Above 5 kV
0000 0000 0000 0001 1 = 1 kV to 5 kV
0000 0000 0000 0010 2 = Below 1 kV
F90
16 bits
For LOW VOLTAGE WINDING RATING ≥ 5 kV
Format: Unsigned value, 1 decimal place
Example: 123.4 stored as 1234
For 1 kV ≤ LOW VOLTAGE WINDING RATING < 5 kV
Format: Unsigned value, 2 decimal places
Example: 12.34 stored as 1234
For LOW VOLTAGE WINDING RATING < 1 kV
Format: Unsigned value, 3 decimal places
Example: 1.234 stored as 1234
F91
16 bits
For LOW VOLTAGE WINDING RATING ≥ Above 5 kV
Format: Unsigned value, 2 decimal places
Example: 12.34 stored as 1234
For 1 kV ≤ LOW VOLTAGE WINDING RATING < 5 kV
Format: Unsigned value, 3 decimal places
Example: 1.234 stored as 1234
For LOW VOLTAGE WINDING RATING < 1 kV
Format: Unsigned value, 4 decimal places
Example: 0.1234 stored as 1234
F92
16 bits
0000 0000 0000 0010 0 = 2nd
0000 0000 0000 0011 1 = 3rd
GE Power Management
DEFINITION
LOW VOLTAGE WINDING RATING
UNSIGNED VALUE
AUTORANGING VOLTAGE / RATED
LOAD / MIN TAP VOLTAGE
UNSIGNED VALUE, AUTORANGING
VOLTAGE INCREMENT PER TAP
HARMONIC NUMBER
745 Transformer Management Relay
8.3 MODBUS MEMORY MAP
Table 8–7: 745 DATA FORMATS (Sheet 32 of 35)
FORMAT
APPLICABLE BITS
CODE
0000 0000 0000 0100 2 = 4th
0000 0000 0000 0101 3 = 5th
0000 0000 0000 0110 4 = 6th
0000 0000 0000 0111 5 = 7th
0000 0000 0000 1000 6 = 8th
0000 0000 0000 1001 7 = 9th
0000 0000 0000 1010 8 = 10th
0000 0000 0000 1011 9 = 11th
0000 0000 0000 1100 10 = 12th
0000 0000 0000 1101 11 = 13th
0000 0000 0000 1110 12 = 14th
0000 0000 0000 1111 13 = 15th
0000 0000 0001 0000 14 = 16th
0000 0000 0001 0001 15 = 17th
0000 0000 0001 0010 16 = 18th
0000 0000 0001 0011 17 = 19th
0000 0000 0001 0100 18 = 20th
0000 0000 0001 0101 19 = 21st
F93
16 bits
For CT PRIMARY ≤ 2 A
Format: Signed value, 3 decimal places
Example: 1.234 stored as 1234
For 2 A < CT PRIMARY ≤ 20 A
Format: Signed value, 2 decimal places
Example: 12.34 stored as 1234
For 20 A < CT PRIMARY ≤ 200 A
Format: Signed value, 1 decimal place
Example: 123.4 stored as 1234
For 200 A < CT PRIMARY ≤ 2000 A
Format: Signed value
Example: 1234 stored as 1234
For CT PRIMARY > 2000 A
Format: Signed value, scaled by 10
Example: 12340 stored as 1234
F94
16 bits
For CT PRIMARY ≤ 2 A
Format: Signed value, 3 decimal places
Example: 1.234 stored as 1234
For 2 A < CT PRIMARY ≤ 20 A
Format: Signed value, 2 decimal places
Example: 12.34 stored as 1234
DEFINITION
SIGNED VALUE
AUTORANGING BASED ON
WINDING 1 PHASE CT PRIMARY
SIGNED VALUE
AUTORANGING BASED ON
WINDING 2 PHASE CT PRIMARY
8-89
8
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