
CHAPTER 4: MODBUS MEMORY MAP
DATA FORMATS
750/760 FEEDER MANAGEMENT RELAY – COMMUNICATIONS GUIDE
4 - 51
F24
ctd.
4
2
Ground Time Overcurrent
5
2
Ground Instantaneous Overcurrent
6
2
Neutral Time OC 1
7
2
Neutral Time OC 2
8
2
Neutral Instantaneous Overcurrent 1
9
2
Neutral Instantaneous Overcurrent 2
10
2
Phase Directional is Reverse
11
2
Neutral Directional is Reverse
12
2
Manual Close Feature Blocking
13
Cold Load Pickup Feature Blocking
14
Bus Undervoltage 1
15
Bus Undervoltage 2
16
Line Undervoltage 3
17
Line Undervoltage 4
18
Overvoltage 1
19
Overvoltage 2
20
Underfrequency 1
21
Underfrequency 2
22
Phase Current Level
23
1
Neutral Current Level
24
Power Factor 1
25
Power Factor 2
26
Out Of Synchronization
27
Current Demand
28
Real Power Demand
29
Reactive Power Demand
30
Apparent Power Demand
31
Analog Input Threshold 1
32
Analog Input Threshold 2
33
Analog Input Rate of Change 1
34
Analog Input Rate of Change 2
35
Overfrequency
36
Trip Counter
37
Arcing Current
38
VT Failure
39
Breaker Failure
40
Breaker Operation
41
Trip Coil Monitor
42
Close Coil Monitor
43
User Input A
44
User Input B
45
User Input C
46
User Input D
47
User Input E
48
User Input F
49
User Input G
50
User Input H
51
Negative Sequence Instantaneous Overcurrent
52
Negative Sequence Time Overcurrent
53
Negative Sequence Overvoltage
54
Undervoltage Restoration
Table 4: Data Formats (Sheet 6 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.