ABB UNITROL 1020 - Page 135

 Chapter 6 - Operation
UNITROL 1020 User Manual 3BHS335648 E82 127
Monitor \ Oscilloscope, Status Display
There are 4 analog signals that represent status changes on the oscilloscope. The
decoding of those signals is explained as follows:
Generator Control Mode:
0 = Auto
1 = Var
2 = PF
3 = Manual
4 = Open Loop
5 = VDC
6 = Sync
7 = Standby
Combined Limit:
0 = None
1 = Minimum Excitation Current Limiter active (Min Ie)
2 = Minimum Machine Voltage Limiter active (Min UM
3 = Minimum Iq Limiter active (Min Iq)
4 = Maximum Excitation Current Limiter active (Max Ie)
5 = Maximum Machine Voltage Limiter active (Max UM)
6 = Reserved
7 = Maximum Machine Current Limiter active (Max IM)
+8 = V/Hz Limiter active
+16 = Minimum Setpoint reached
+32 = Maximum Setpoint reached
Excitation ON active: Combined Limit = See values above
Excitation ON not active: Combined Limit = -1.0
GenState (Generator State):
0 = Idle (NoLoad)
1 = Change NoLoad -> Primary Net
2 = Primary Net
3 = Change Primary Net <-> Secondary Net
4 = Secondary Net
5 = Change Secondary Net -> NoLoad
6 = Primary Net or Secondary Net -> Grid ON
7 = Grid ON
8 = Grid ON -> Primary Net or Secondary Net
AlarmTripStatus:
0 = None
+ 1 = SW Alarm active
+ 2 = FCB Alarm active
+ 4 = External Alarm active
+ 8 = Modbus Communication Alarm active
+ 16 = Diode Alarm active (requires RDM SW)
+ 32 = Diode Trip active (requires RDM SW)
+ 64 = Supervision Alarm active (requires Double Channel SW)
+128 = Supervision Trip active (requires Double Channel SW)
+256 = DCH SwitchOver active (requires Double Channel SW)