GE 760 - Page 75

CHAPTER 4: MODBUS MEMORY MAP DATA FORMATS
750/760 FEEDER MANAGEMENT RELAY – COMMUNICATIONS GUIDE 4 - 55
F25
2's Complement Signed Value
To convert phase currents to Amps, multiply by ‘Phase CT Primary’ and divide by 1000. To convert
ground current to Amps, multiply by ‘Ground CT Primary’ and divide by 1000. To convert sensitive
ground current to Amps, multiply by ‘Sensitive Ground CT Primary’ and divide by 10000. To convert to
voltages to Volts, multiply by ‘VT Ratio’, multiply by ‘VT Secondary Voltage’ and divide by 1000.
F26
Trace Memory Channel Selector
The contents of the Trace Memory Samples depends on the value contained in the Trace Memory
Channel Selector as follows:
0 Phase A Current (Format F25)
1 Phase B Current (Format F25)
2 Phase C Current (Format F25)
3 Ground Current (Format F25)
4 A-N (A-B) Voltage (Format F25)
5 B-N Voltage (Format F25)
6 C-N (C-B) Voltage (Format F25)
7 Line Voltage (Format F25)
8 Output Relay States (Format F40)
9 Logic Input States (Format F46)
10
3
Sensitive Ground Current (Format F25)
F27
Communications Parity
0None
1Odd
2Even
F28
VT Connection Type
0None
1Wye
2Delta
F29
760 Operation
0Not Ready
1Ready
F30
Enabled/Disabled
0 0 = Disabled
1 1 = Enabled
F31
Baud Rate
0300 Baud
1 1200 Baud
2 2400 Baud
3 4800 Baud
4 9600 Baud
5 19200 Baud
F32
Default Message
Internally Defined
F33
ASCII Text Characters
00FFh Second ASCII Character
FF00h First ASCII Character
F34
Relay Non-operated State
0 De-energized
1Energized
F35
Relay Output Type
0 Self-Resetting
1Latched
2Pulsed
Table 4: Data Formats (Sheet 10 of 20)
Type Value Description
1 2 3 4 5 6 7 8 9 10 11 12 13
For explanation of footnotes, see notes of end of Table.