F87; To 8; F30; F46 - GE Multilin 745 Communications Manual

MODBUS PROTOCOL
Table 2–4: 745 memory map (Sheet 50 of 56)
Addr Description
22C6 Underfrequency 2 current sensing
22C7 Underfrequency 2 minimum operating voltage
22C8 Underfrequency 2 relays
22C9 Reserved
↓ ↓
22CF Reserved
Frequency decay
22D0 Frequency decay function
22D1 Frequency decay target
22D2 Frequency decay minimum operating current
22D3 Frequency decay threshold
22D4 Frequency decay rate 1
22D5 Frequency decay rate 2
22D6 Frequency decay rate 3
22D7 Frequency decay rate 4
22D8 Frequency decay block
22D9 Frequency decay current sensing
22DA Frequency decay minimum operating voltage
22DB Frequency decay delay
22DC Frequency decay relays
22DD Reserved
22DE Reserved
22DF Reserved
Overfrequency
22E0 Overfrequency function
22E1 Overfrequency target
22E2 Overfrequency minimum operating current
22E3 Overfrequency pickup
22E4 Overfrequency delay
22E5 Overfrequency block
22E6 Overfrequency current sensing
22E7 Overfrequency minimum operating voltage
22E8 Overfrequency relays
22E9 Reserved
↓ ↓
22EF Reserved
Fifth harmonic level
22F0 5th harmonic level function
22F1 5th harmonic level target
22F2 5th harmonic level minimum operating current
22F3 5th harmonic level pickup
22F4 5th harmonic level delay
22F5 5th harmonic level block
22F6 5th harmonic level relays
22F7 Reserved
↓ ↓
22FF Reserved
2–62
Range Step
--- ---
0.01 to 0.99 0.01

1 to 8

---
↓ ↓
--- ---
--- ---
0.05 to 1.00 0.01
45.00 to 59.99 0.01
0.1 to 5.0 0.1
0.1 to 5.0 0.1
0.1 to 5.0 0.1
0.1 to 5.0 0.1
--- ---
--- ---
0.10 to 0.99 0.01
0.00 to 600.00 0.01
1 to 8 ---
--- ---
--- ---
0.05 to 1.00 0.01
50.01 to 65.00 0.01
0.00 to 600.00 0.01
--- ---
--- ---
0.10 to 0.99 0.01
1 to 8 ---
↓ ↓
--- ---
--- ---
0.03 to 1.00 0.01
0.1 to 99.9 0.1
0 to 60000 1
--- ---
1 to 8 ---
↓ ↓
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 2: MODBUS PROTOCOL
Units Format Default
---

F30

1 = Enabled
× VT 50 = 0.50 × VT
F3
--- F153 None
↓ ↓ ↓
--- F30 0 = Disabled
---

F46

1 = Latched
× CT F3 20 = 0.20 × CT
Hz F3 5950 = 59.5 Hz
Hz/s F2 4 = 0.4 Hz/s
Hz/s F2 10 = 1.0 Hz/s
Hz/s F2 20 = 2.0 Hz/s
Hz/s F2 40 = 4.0 Hz/s
---

F87

0 = Disabled
--- F30 1 = Enabled
× VT F3 50 = 0.50 × VT
s F3 0 = 0.00 s
--- F153 None
--- F30 0 = Disabled
--- F46 1 = Latched
× CT F3 20 = 0.20 × CT
Hz F3 6050 = 60.5 Hz
s F3 500 = 5.00 s
--- F87 0 = Disabled
--- F30 1 = Enabled
× VT F3 50 = 0.50 × VT
--- F153 None
↓ ↓ ↓
--- F30 0 = Disabled
--- F46 0 = Self-reset
× CT 10 = 0.10 × CT
F3
% ƒo F1 100 = 10.0% ƒo
s F1 10 s
--- F87 0 = Disabled
--- F153 None
↓ ↓ ↓