CHAPTER 2: MODBUS PROTOCOL
MODBUS PROTOCOL
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
2–53
201C
Reserved
201D
Reserved
201E
Reserved
201F
Reserved
Instantaneous differential
2020
Instantaneous differential function
---
---
---
F30
1 = Enabled
2021
Instantaneous differential target
---
---
---
F46
1 = Latched
2022
Instantaneous differential pickup
3.00 to 20.00
0.01
×
CT
F3
800 = 8.00
×
CT
2023
Instantaneous differential block
---
---
---
F87
0 = Disabled
2024
Instantaneous differential relays
1 to 8
---
---
F153
None
2025
Reserved
↓
↓
↓
↓
↓
↓
↓
203F
Reserved
Winding 1 phase time overcurrent
2040
Winding 1 phase time overcurrent function
---
---
---
F30
1 = Enabled
2041
Winding 1 phase time overcurrent target
---
---
---
F46
1 = Latched
2042
Winding 1 phase time overcurrent pickup
0.05 to 20.00
0.01
×
CT
F3
120 = 1.20
×
CT
2043
Winding 1 phase time overcurrent shape
---
---
---
F36
0 = Ext Inverse
2044
Winding 1 phase time overcurrent multiplier
0.00 to 100.00
0.01
---
F3
100 = 1.00
2045
Winding 1 phase time overcurrent reset
---
---
---
F68
1 = Linear
2046
Winding 1 phase time overcurrent block
---
---
---
F87
0 = Disabled
2047
Winding 1 harmonic derating correction
---
---
---
F30
0 = Disabled
2048
Winding 1 phase time overcurrent relays
1 to 8
---
---
F153
None
2049
Reserved
↓
↓
↓
↓
↓
↓
↓
204F
Reserved
Winding 2 phase time overcurrent
2050
Winding 2 phase time overcurrent function
---
---
---
F30
1 = Enabled
2051
Winding 2 phase time overcurrent target
---
---
---
F46
1 = Latched
2052
Winding 2 phase time overcurrent pickup
0.05 to 20.00
0.01
×
CT
F3
120 = 1.20 ¥
×
CT
2053
Winding 2 phase time overcurrent shape
---
---
---
F36
0 = Ext Inverse
2054
Winding 2 phase time overcurrent multiplier
0.00 to 100.00
0.01
---
F3
100 = 1.00
2055
Winding 2 phase time overcurrent reset
---
---
---
F68
1 = Linear
2056
Winding 2 phase time overcurrent block
---
---
---
F87
0 = Disabled
2057
Winding 2 harmonic derating correction
---
---
---
F30
0 = Disabled
2058
Winding 2 phase time overcurrent relays
1 to 8
---
---
F153
None
2059
Reserved
↓
↓
↓
↓
↓
↓
↓
205F
Reserved
Winding 3 phase time overcurrent
2060
Winding 3 phase time overcurrent function
---
---
---
F30
1 = Enabled
2061
Winding 3 phase time overcurrent target
---
---
---
F46
1 = Latched
2062
Winding 3 phase time overcurrent pickup
0.05 to 20.00
0.01
×
CT
F3
120 = 1.20
×
CT
2063
Winding 3 phase time overcurrent shape
---
---
---
F36
0 = Ext Inverse
2064
Winding 3 phase time overcurrent multiplier
0.00 to 100.00
0.01
---
F3
100 = 1.00
2065
Winding 3 phase time overcurrent reset
---
---
---
F68
1 = Linear
2066
Winding 3 phase time overcurrent block
---
---
---
F87
0 = Disabled
Table 2–4: 745 memory map (Sheet 41 of 56)
Addr
Description
Range
Step
Units
Format
Default