GE Multilin 745 Communications Manual page 91

CHAPTER 2: MODBUS PROTOCOL
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
F52: Logic flags (16-bit bitmask)
Bitmask Logic flag
–––– –––– –––– –––x Pickup flag (0 = not picked up, 1 = picked up)
–––– –––– –––– ––x– Operated flag (0 = not operated, 1 = operated)
–––– –––– –––– –x–– Latched flag (0 = not latched, 1 = latched)
–––– –––– –––– x––– Self-test flag (0 = no error, 1 = error)
–––– –––– –––x –––– Not used
–––– –––– ––x– –––– Not used
–––– –––– –x–– –––– Not used
–––– –––– x––– –––– Not used
–––– –––x –––– –––– Phase A flag (0 = no fault, 1 = fault)
–––– ––x– –––– –––– Phase B flag (0 = no fault, 1 = fault)
–––– –x–– –––– –––– Phase C flag (0 = no fault, 1 = fault)
–––– x––– –––– –––– Ground flag (0 = no fault, 1 = fault)
F53: Unsigned value, 3 decimal places (16 bits)
Example: 1.234 stored as 1234
F54: Force LED state (16-bit bitmask)
Bitmask LED state
–––– –––– –––– –––1 LED #1 on (top)
–––– –––– –––– ––1– LED #2 on
–––– –––– –––– –1–– LED #3 on
–––– –––– –––– 1––– LED #4 on
–––– –––– –––1 –––– LED #5 on
–––– –––– ––1– –––– LED #6 on
–––– –––– –1–– –––– LED #7 on
–––– –––– 1––– –––– LED #8 on (bottom)
F55: Front panel keypress (16-bit enumeration)
Value Key
0 "0"
1 "1"
2 "2"
3 "3"
4 "4"
5 "5"
6 "6"
7 "7"
Value Key
8 "8"
9 "9"
10 Decimal
11 Message up
12 Message down
13 Message left
14 Message right
15 Value up
MODBUS PROTOCOL
Value Key
16 Enter
17 Reset
18 Menu
19 Escape
20 Value down
21 Help
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