GE Multilin 745 Communications Manual page 19

CHAPTER 2: MODBUS PROTOCOL
745 memory map
Table 2–4: 745 memory map (Sheet 1 of 56)
Addr Description
Product ID (addresses 0000 to 007F, read only)
0000 GE Multilin product device code
0001 Hardware revision
0002 Software revision
0003 Version number
0004 Bootware revision
0005 Installed options
0006 Serial number (4 registers)
000A Manufacture date (2 registers)
000C Reserved
000D Reserved
↓ ↓
001F Reserved
Upgrade options (addresses 0020 to 002F, read/write)
0020 New options
0021 Modify passcode
0022 Reserved
0023 Reserved
↓ ↓
007F Reserved
Commands (Addresses 0080 to 00FF) - Read / Write
Commands
0080 Command operation code
0081 Passcode access (4 registers)
Note: From version 5.23 onward, relay
response to read request is 00000000.
0085 Change passcode (4 registers)
Note: From version 5.23 onward, relay
response to read request is 00000000.
0089 Reserved
008A Reserved
↓ ↓
008F Reserved
Virtual inputs
0090 Virtual input 1 programmed state
0091 Virtual input 2 programmed state
0092 Virtual input 3 programmed state
0093 Virtual input 4 programmed state
0094 Virtual input 5 programmed state
0095 Virtual input 6 programmed state
0096 Virtual input 7 programmed state
0097 Virtual input 8 programmed state
0098 Virtual input 9 programmed state
0099 Virtual input 10 programmed state
009A Virtual input 11 programmed state
009B Virtual input 12 programmed state
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
The Modbus memory map for the 745 Transformer Protection System is shown below. All
addresses are in hexadecimal format.
Range Step Units
--- --- ---
--- --- ---
--- --- ---
000 to 999 001 ---
000 to 999 001 ---
--- --- ---
--- --- ---
--- --- ---
↓ ↓
--- --- ---
--- --- ---
↓ ↓
--- --- ---
--- --- ---
--- --- ---
↓ ↓
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
MODBUS PROTOCOL
Format Default
F1 33 = 745
F13 4 = D
F14 200
F1 000
F14 120
F15 ---
F33 "A0000000"
F23 ---
↓ ↓ ↓
F15 ---
F33 ---
↓ ↓ ↓
F19 ---
F33 00000000
F33 00000000
↓ ↓ ↓
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
F43 0
2–13