GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 229

7 COMMUNICATIONS
Table 7–6: 745 DATA FORMATS (Sheet 23 of 25)
CODE APPLICABLE BITS
F88 0000 0000 0000 0111
con't
0000 0000 0000 1000
0000 0000 0000 1001
0000 0000 0000 1010
0000 0000 0000 1011
0000 0000 0000 1100
0000 0000 0000 1101
0000 0000 0000 1110
0000 0000 0000 1111
0000 0000 0001 0000
F89 16 bits
0000 0000 0000 0000
0000 0000 0000 0001
0000 0000 0000 0010
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
0000 0000 0000 0011
0000 0000 0000 0100
0000 0000 0000 0101
0000 0000 0000 0110
0000 0000 0000 0111
0000 0000 0000 1000
0000 0000 0000 1001
0000 0000 0000 1010
0000 0000 0000 1011
0000 0000 0000 1100
0000 0000 0000 1101
0000 0000 0000 1110
0000 0000 0000 1111
0000 0000 0001 0000
0000 0000 0001 0001
0000 0000 0001 0010
0000 0000 0001 0011
0000 0000 0001 0100
0000 0000 0001 0101
GE Multilin
Courtesy of NationalSwitchgear.com
DEFINITION
7 = Logic Input 7
8 = Logic Input 8
9 = Logic Input 9
10 = Logic Input 10
11 = Logic Input 11
12 = Logic Input 12
13 = Logic Input 13
14 = Logic Input 14
15 = Logic Input 15
16 = Logic Input 16
LOW VOLTAGE WINDING RATING
0 = Above 5 kV
1 = 1 kV to 5 kV
2 = Below 1 kV
UNSIGNED VALUE
AUTORANGING VOLTAGE / RATED
LOAD / MIN TAP VOLTAGE
UNSIGNED VALUE, AUTORANGING
VOLTAGE INCREMENT PER TAP
HARMONIC NUMBER
0 = 2nd
1 = 3rd
2 = 4th
3 = 5th
4 = 6th
5 = 7th
6 = 8th
7 = 9th
8 = 10th
9 = 11th
10 = 12th
11 = 13th
12 = 14th
13 = 15th
14 = 16th
15 = 17th
16 = 18th
17 = 19th
18 = 20th
19 = 21st
745 Transformer Management Relay
7.4 MODBUS MEMORY MAP
Table 7–6: 745 DATA FORMATS (Sheet 24 of 25)
CODE APPLICABLE BITS DEFINITION
F93 16 bits SIGNED VALUE
AUTORANGING BASED ON
WINDING 1 PHASE CT PRIMARY
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 SIGNED VALUE
AUTORANGING BASED ON
WINDING 2 PHASE CT PRIMARY
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
F95 16 bits SIGNED VALUE
AUTORANGING BASED ON
WINDING 3 PHASE CT PRIMARY
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
F96 32 bits UNSIGNED VALUE
AUTORANGING BASED ON
WINDING 1 PHASE CT PRIMARY
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
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