Table 3-3. Fault Configuration For Fault Alarm - Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 User Manual

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Fault Alarm Type
Driver Over Current
Tracking Error
Watchdog Expired
RDC Failure
Retract/Extended
Command
Unregulated Voltage Low
+14 Volts Low
+14 Volts High
-14 Volts Low
-14 Volts High
Input Voltage Low
Input Voltage High
DSP Failure
Electronics Over Temp

Table 3-3. Fault Configuration For FAULT Alarm

Persist Time
Driver current > Max Force equivalent
10 Sec
Driver current > Max Force equivalent
current, Fault. If persists for 1 Min.,
1 Sec
Driver current > 18 Amps, Fault. If
persists for 1 Min., Shutdown
If in RUN state, not in home dead band
10 Sec and position error > allowable,
If not in overcurrent, RDC not faulted and
feedback not equal to demand, Fault.
If last reset was caused by watchdog
< 1 Sec timer timeout or illegal address attempt,
< 1 Sec Tests hardware for RDC failure, sets
N/A
10 Sec Unregulated voltage low, Fault.
7.5 Sec
< 1 Sec
7.5 Sec
< 1 Sec
7.5 Sec
< 1 Sec
7.5 Sec
< 1 Sec
7.5 Sec
< 1 Sec
Input Voltage > 180 V, Fault.
7.5 Sec
< 1 Sec
N/A
10 Sec Electronics temp ≥ 110 °C, Fault
HFG2.0 USER GUIDE
Fault Action
current, Fault.
Shutdown
Fault.
Fault.
Fault if RDC failure bit set.
Fault not used.
+14 V supply < 12 V, Fault.
+14 V supply > 16 V, Fault.
-14 V supply > -12 V, Fault.
-14 V supply < -16 V, Fault.
Input Voltage < 75 V, Fault.
Fault not implemented.