GE Multilin 745 Communications Manual page 40

MODBUS PROTOCOL
Table 2–4: 745 memory map (Sheet 22 of 56)
Addr Description
0857 Event XX winding 3 ground current magnitude
0858 Event XX winding 3 ground current angle
0859 Event XX winding 3 phase A 2nd harmonic
085A Event XX winding 3 phase B 2nd harmonic
085B Event XX winding 3 phase C 2nd harmonic
085C Event XX winding 3 phase A 5th harmonic
085D Event XX winding 3 phase B 5th harmonic
085E Event XX winding 3 phase C 5th harmonic
085F Event XX phase A differential current
0860 Event XX phase B differential current
0861 Event XX phase C differential current
0862 Event XX phase A restraint current
0863 Event XX phase B restraint current
0864 Event XX phase C restraint current
0865 Event XX system frequency
0866 Event XX frequency decay rate
0867 Event XX tap changer position
0868 Event XX volts-per-hertz
0869 Event XX ambient temperature
086A Event XX analog input
086B Reserved
086C Reserved
↓ ↓
086F Reserved
Communications actual values
0870 CoBox serial number
0884 MAC address
0898 CoBox firmware version
08AC Ethernet status
08AD Reserved
08AE Reserved
↓ ↓
0FFF Reserved
Common setpoints (addresses 1000 to 1FFF, read/write)
745 setup
1000 745 setpoints
1001 Encrypted passcode (4 registers, read only)
Note: From version 5.23 onward, relay
response to read request is 00000000.
1005 Reserved
1006 Flash message time
1007 Default message timeout
1008 Reserved
1009 Slave address
100A COM1 baud rate
100B COM1 parity
100C COM1 communication hardware
100D COM2 baud rate
2–34
Range Step
--- ---
0 to 359 1
0.0 to 99.9 0.1
0.0 to 99.9 0.1
0.0 to 99.9 0.1
0.0 to 99.9 0.1
0.0 to 99.9 0.1
0.0 to 99.9 0.1
0.00 to 655.35 0.01
0.00 to 655.35 0.01
0.00 to 655.35 0.01
0.00 to 655.35 0.01
0.00 to 655.35 0.01
0.00 to 655.35 0.01
0.00 to 99.99 0.01
–9.99 to 9.99 0.01
1 to 50 1
0.00 to 4.00 0.01
–51 to 251 1
0 to 65000 1 <Units>
↓ ↓
--- ---
--- ---
--- ---
--- ---
↓ ↓
--- ---
--- ---
0.5 to 10.0 0.5
10 to 900 1
1 to 254 1
--- ---
--- ---
--- ---
--- ---
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 2: MODBUS PROTOCOL
Units Format Default
A F83 0 A
° Lag F1 0° Lag
% ƒo F2 0% ƒo
% ƒo F2 0% ƒo
% ƒo F2 0% ƒo
% ƒo F2 0% ƒo
% ƒo F2 0% ƒo
% ƒo F2 0% ƒo
× CT 0.00 × CT
F3
× CT F3 0.00 × CT
× CT F3 0.00 × CT
× CT F3 0.00 × CT
× CT F3 0.00 × CT
× CT 0.00 × CT
F3
Hz F3 0.00 Hz
Hz/s F6 0.00 Hz/s
--- F1 0 = n/a
V/Hz F3 0.00 V/Hz
°C F4 0 °C
F1 0 <Units>
↓ ↓ ↓
--- F22 Unknown
--- F22 Unknown
--- F22 Unknown
--- F152 ---
↓ ↓ ↓
--- F29 0 = Not Prog'd
--- F33 00000000
s F2 40 = 4.0 s
s F1 300 s
--- F1 254
--- F31 5 = 19200 Bd
--- F73 0 = None
--- F17 0 = RS485
--- F31 5 = 19200 Bd