GE Multilin 745 Communications Manual page 101

CHAPTER 2: MODBUS PROTOCOL
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
F102: Data link confirmation mode (16-bit enumeration)
Value Confirmation mode
0 Never
1 Sometimes
2 Always
F103: Ground input selection (16-bit enumeration)
Value Port
0 None
1 G1/2
2 G2/3
F150: IP address (unsigned 32-bit integer)
Each byte in this register represents one octet in an IP address. For example, 015EDA1F
hex indicates IP address 1.94.218.31.
F152: Ethernet status (16-bit bitmask)
Bitmask Status
–––– –––– –––– –––1 Diagnostic status on
–––– –––– –––– ––1– Connection status on
–––– –––– –––– –1–– Not used
–––– –––– –––– 1––– Ethernet link status on
F153: Output relay flags (16-bit bitmask)
Bitmask Output Selection
–––– –––– –––– –––1 Output relay 1 (0 = Not Assigned; 1 = Assigned)
–––– –––– –––– ––1– Output relay 2 (0 = Not Assigned; 1 = Assigned)
–––– –––– –––– –1–– Output relay 3 (0 = Not Assigned; 1 = Assigned)
–––– –––– –––– 1––– Output relay 4 (0 = Not Assigned; 1 = Assigned)
–––– –––– –––1 –––- Output relay 5 (0 = Not Assigned; 1 = Assigned)
–––– –––– ––1– ––-– Output relay 6 (0 = Not Assigned; 1 = Assigned)
–––– –––– –1–– –-–– Output relay 7 (0 = Not Assigned; 1 = Assigned)
–––– –––– 1––– -––– Output relay 8 (0 = Not Assigned; 1 = Assigned)
F156: floating point (32 bits)
IEEE 754 single precision binary floating-point format: binary32.
The first modbus address contains the sign bit, exponent, and 7 most significant bits of the
fraction. The second modbus address contains the 16 least significant bits of the fraction.
Reference: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4610935
MODBUS PROTOCOL
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