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8.3 MODBUS MEMORY MAP
Table 8–6: 745 MEMORY MAP (Sheet 14 of 57)
GROUP
ADDR
(HEX)
TOTAL
0420
HARMONIC
0421
DISTORTION
0422
0423
0424
0425
0426
0427
0428
0429
↓
042F
HARMONIC
0430
DERATING
0431
0432
0433
↓
043F
FREQUENCY
0440
0441
0442
↓
0444
TAP CHANGER
0445
0446
↓
0448
VOLTAGE
0449
8
044A
044B
044C
044D
↓
044F
CURRENT
0450
DEMAND
0452
0454
0455
8-30
DESCRIPTION
Winding 1 Phase A Total Harmonic Distortion
Winding 1 Phase B Total Harmonic Distortion
Winding 1 Phase C Total Harmonic Distortion
Winding 2 Phase A Total Harmonic Distortion
Winding 2 Phase B Total Harmonic Distortion
Winding 2 Phase C Total Harmonic Distortion
Winding 3 Phase A Total Harmonic Distortion
Winding 3 Phase B Total Harmonic Distortion
Winding 3 Phase C Total Harmonic Distortion
Reserved
↓
Reserved
Winding 1 Harmonic Derating Factor
Winding 2 Harmonic Derating Factor
Winding 3 Harmonic Derating Factor
Reserved
↓
Reserved
System Frequency
Frequency Decay Rate
Reserved
↓
Reserved
Tap Changer Position
Reserved
↓
Reserved
System Line-to-Line Voltage
Volts-per-Hertz
Line-to-Ntrl Voltage - Magnitude
Line-to-Ntrl Voltage - Angle
Reserved
↓
Reserved
Demand Data Last Clear Date (2 registers)
Demand Data Last Clear Time (2 registers)
Winding 1 Phase A Current Demand
Winding 1 Phase B Current Demand
745 Transformer Management Relay
RANGE
STEP
UNITS
VALUE
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
0.0 to 99.9
0.1
% ƒo
↓
↓
↓
0.00 to 1.00
0.01
---
0.00 to 1.00
0.01
---
0.00 to 1.00
0.01
---
↓
↓
↓
0.00 to 99.99
0.01
Hz
–9.99 to 9.99
0.01
Hz/s
↓
↓
↓
1 to 50
1
---
↓
↓
↓
0.00 to 600.00
0.01
kV
0.00 to 4.00
0.01
V/Hz
0.00 to 600.00
0.01
kV
0 to 359
1
° Lag
↓
↓
↓
---
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---
---
---
---
---
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A
---
---
A
8 COMMUNICATIONS
FORMAT
FACTORY
CODE
DEFAULT
F2
---
F2
---
F2
---
F2
---
F2
---
F2
---
F2
---
F2
---
F2
---
↓
↓
F3
---
F3
---
F3
---
↓
↓
F3
---
F6
---
↓
↓
F1
---
↓
↓
F3
---
F3
---
F3
---
F1
↓
↓
F23
---
F22
---
F78
---
F78
---
GE Power Management
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