GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 230

7.4 MODBUS MEMORY MAP
Table 7–6: 745 DATA FORMATS (Sheet 25 of 25)
CODE APPLICABLE BITS
F97 32 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
F98 32 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
F99 16 bits
0000 0000 0000 0000
0000 0000 0000 0001
0000 0000 0000 0010
0000 0000 0000 0011
F100 16 bits
0000 0000 0000 0000
7
0000 0000 0000 0001
0000 0000 0000 0010
F101 16 bits
Low Volt. Winding rating ≥ 5 KV
Unsigned Value, 0 Decimal Places
Example: 1234 stored as 1234
1 KV ≤ Low Volt. Winding rating < 5 KV
Unsigned Value, 1 Decimal Place
Example: 123.4 stored as 1234
Low Volt. Winding rating < 1 KV
Unsigned Value, 2 Decimal Places
Example: 12.34 stored as 1234)
F102 16 bits
0000 0000 0000 0000
0000 0000 0000 0001
0000 0000 0000 0010
7-60
Courtesy of NationalSwitchgear.com
DEFINITION
UNSIGNED VALUE
AUTORANGING BASED ON
WINDING 2 PHASE CT PRIMARY
UNSIGNED VALUE, AUTORANGING
BASED ON WINDING 3 PHASE CT
PRIMARY
PORT USED FOR DNP
0=None
1=Com 1
2=Com 2
3=Front
COOLING TYPE FOR DRY
TRANSFORMER
0=Sealed Self Cooled
1=Vented Self cooled
2=Forced-cooled
UNASSIGNED VALUE, AUTO-
RANGING LOAD LOSS AT RATED
LOAD
DATA LINK CONFIRMATION MODE
0=Never
1=Sometimes
2=Always
745 Transformer Management Relay
7 COMMUNICATIONS
GE Multilin