GE Multilin 745 Communications Manual page 90

MODBUS PROTOCOL
2–84
F49: Input states (16-bit bitmask)
Bitmask Input state
–––– –––– –––– –––x Input 1 (0 = open, 1 = closed)
–––– –––– –––– ––x– Input 2 (0 = open, 1 = closed)
–––– –––– –––– –x–– Input 3 (0 = open, 1 = closed)
–––– –––– –––– x––– Input 4 (0 = open, 1 = closed)
–––– –––– –––x –––– Input 5 (0 = open, 1 = closed)
–––– –––– ––x– –––– Input 6 (0 = open, 1 = closed)
–––– –––– –x–– –––– Input 7 (0 = open, 1 = closed)
–––– –––– x––– –––– Input 8 (0 = open, 1 = closed)
–––– –––x –––– –––– Input 9 (0 = open, 1 = closed)
–––– ––x– –––– –––– Input 10 (0 = open, 1 = closed)
–––– –x–– –––– –––– Input 11 (0 = open, 1 = closed)
–––– x––– –––– –––– Input 12 (0 = open, 1 = closed)
–––x –––– –––– –––– Input 13 (0 = open, 1 = closed)
––x– –––– –––– –––– Input 14 (0 = open, 1 = closed)
–x–– –––– –––– –––– Input 15 (0 = open, 1 = closed)
x––– –––– –––– –––– Input 16 (0 = open, 1 = closed)
F50: Output relay states (16-bit bitmask)
Bitmask Output state
–––– –––– –––– –––x Output relay 1 (0 = de-energized, 1 = energized)
–––– –––– –––– ––x– Output relay 2 (0 = de-energized, 1 = energized)
–––– –––– –––– –x–– Output relay 3 (0 = de-energized, 1 = energized)
–––– –––– –––– x––– Output relay 4 (0 = de-energized, 1 = energized)
–––– –––– –––x –––– Output relay 5 (0 = de-energized, 1 = energized)
–––– –––– ––x– –––– Output relay 6 (0 = de-energized, 1 = energized)
–––– –––– –x–– –––– Output relay 7 (0 = de-energized, 1 = energized)
–––– –––– x––– –––– Output relay 8 (0 = de-energized, 1 = energized)
–––– –––x –––– –––– Self-test relay (0 = de-energized, 1 = energized)
F51: DSP diagnostic flags (16-bit bitmask)
Bitmask Diagnostic flag
–––– –––– –––– –––x A/D virtual ground (0 = OK, 1 = out of tolerance)
–––– –––– –––– ––x– A/D subsystem (0 = OK, 1 = not responding)
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 2: MODBUS PROTOCOL