
CHAPTER 4: MODBUS MEMORY MAP
MEMORY MAP
750/760 FEEDER MANAGEMENT RELAY – COMMUNICATIONS GUIDE
4 - 33
1789
Bus Undervoltage 2 Relays
---
---
F57
None
178A
2
Bus Undervoltage 2 Pickup
0.00 to 1.25
x VT
F3
0.75 x VT
178B
Bus Undervoltage 2 Delay
0.0 to 6000.0
s
F2
2.0 s
178C
Bus Undervoltage 2 Phases Required for Operation
---
---
F41
All Three
178D
2
Bus Undervoltage 2 Minimum Operating Voltage
0.00 to 1.25
x VT
F3
0.30 x V
178E
Bus Undervoltage 2 Curve
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---
F45
Definite Time
OVERVOLTAGE 1 (read/write setpoints)
1790
Overvoltage 1 Function
---
---
F39
Disabled
1791
Overvoltage 1 Relays
---
---
F57
None
1792
2
Overvoltage 1 Pickup
0.00 to 1.25
x VT
F3
1.25 x VT
1793
Overvoltage 1 Delay
0.0 to 6000.0
s
F2
2.0 s
1794
Overvoltage 1 Phases Required for Operation
---
---
F41
All Three
OVERVOLTAGE 2 (read/write setpoints)
1798
Overvoltage 2 Function
---
---
F39
Disabled
1799
Overvoltage 2 Relays
---
---
F57
None
179A
2
Overvoltage 2 Pickup
0.00 to 1.25
x VT
F3
1.25 x VT
179B
Overvoltage 2 Delay
0.0 to 6000.0
s
F2
2.0 s
179C
Overvoltage 2 Phases Required for Operation
---
---
F41
All Three
UNDERFREQUENCY 1 (read/write setpoints)
17A0
Underfrequency 1 Function
---
---
F39
Disabled
17A1
Underfrequency 1 Relays
---
---
F57
None
17A2
Underfrequency 1 Pickup
20.00 to 65.00
Hz
F3
59.00 Hz
17A3
Underfrequency 1 Delay
0.00 to 600.00
s
F3
2.00 s
17A4
2
Underfrequency 1 Minimum Operating Voltage
0.00 to 1.25
x VT
F3
0.70 x VT
17A5
1
Underfrequency 1 Minimum Operating Current
0.00 to 20.00
x CT
F3
0.20 x CT
UNDERFREQUENCY 2 (read/write setpoints)
17A8
Underfrequency 2 Function
---
---
F39
Disabled
17A9
Underfrequency 2 Relays
---
---
F57
None
17AA
Underfrequency 2 Pickup
20.00 to 65.00
Hz
F3
58.00 Hz
17AB
Underfrequency 2 Delay
0.00 to 600.00
s
F3
3.00 s
17AC
2
Underfrequency 2 Minimum Operating Voltage
0.00 to 1.25
x VT
F3
0.70 x VT
17AD
1
Underfrequency 2 Minimum Operating Current
0.00 to 20.00
x CT
F3
0.20 x CT
LINE UNDERVOLTAGE 3 (read/write setpoints)
17B0
Line Undervoltage 3 Function
---
---
F39
Disabled
17B1
Line Undervoltage 3 Relays
---
---
F57
None
17B2
2
Line Undervoltage 3 Pickup
0.00 to 1.25
x VT
F3
0.75 x VT
17B3
Line Undervoltage 3 Delay
0.0 to 6000.0
s
F2
2.0 s
17B4
2
Line Undervoltage 3 Minimum Operating Voltage
0.00 to 1.25
x VT
F3
0.30 x V
17B5
Line Undervoltage 3 Curve
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---
F45
Definite Time
LINE UNDERVOLTAGE 4 (read/write setpoints)
17B8
Line Undervoltage 4 Function
---
---
F39
Disabled
17B9
Line Undervoltage 4 Relays
---
---
F57
None
17BA
2
Line Undervoltage 4 Pickup
0.00 to 1.25
x VT
F3
0.75 x VT
17BB
Line Undervoltage 4 Delay
0.0 to 6000.0
s
F2
2.0 s
17BC
2
Line Undervoltage 4 Minimum Operating Voltage
0.00 to 1.25
x VT
F3
0.30 x V
17BD
Line Undervoltage 4 Curve
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---
F45
Definite Time
FREQUENCY DECAY (read/write setpoints)
17C0
1
Frequency Decay Function
---
---
F39
Disabled
17C1
1
Frequency Decay Relays
---
---
F57
None
17C2
1
Frequency Decay Rate
0.1 to 5.0
Hz/s
F2
1.0 Hz/s
Table 3: Modbus Memory Map (Sheet 28 of 40)
ADDR
DESCRIPTION
RANGE
UNITS
TYPE
DEFAULT
1 2 3 4 5 6 7 8 9 10 11 12 13
For explanation of Table footnotes, see the Memory Map Notes at the end of this table.