7C.5 Amicon Regulator Reference Information; 7C.5.1 Status & Fault Indicators - O. Thompson Microflite Ultra 2000 Installation & Adjustment Manual

To adjust the regulator for optimum ride quality and performance the following step should be
taken.
Place an oscilloscope on drive terminal XY8. The common lead should be placed on
1.
XY3.
While running the car, observe the scope. If the generator field current is unstable, turn
2.
the ACMP pot clockwise to improve regulator stability and reduce vibration. If the
generator field current is stable, turn the pot counterclockwise in small increments to
improve regulator tracking. Too much ACMP will cause the car to spot in leveling and
run at speeds lower than contract speed.

7c.5 Amicon Regulator Reference Information

7c.5.1 Status and Fault Indicators
RUN (Run Input) - Indicates that the control has a run input and is currently enabled.
LL (Re-Level Limit) - Indicates that the re-leveling overspeed circuit is enabled and re-level
overspeed trip limit is reduced to approximately 10% of contract speed.
TE (Tracking Error) - Indicates that there is currently a difference between commanded speed
and actual speed of greater that 10% of full scale.
SPD (Overspeed Fault) - The overspeed trip is adjustable from 110% to 125% of the contract
speed setting or at approximately 10% of the contract speed when the "LL" contact is pulled in
during re-leveling. The overspeed fault circuit will latch if the scaled tachometer feedback
should exceed 7.0 volts by more than overspeed trip percentage (110-1125%).
SCR (SCR Power Fault) - When a run command is given to the control, the main SCR power
is applied at the same time. If the control does not sense at least 250VAC with 2 seconds
after a run command, the SCR power fault will latch. Similarly, when the run command is
removed from the control, the main SCR power is disconnected at the same time. If the
control does not sense that the SCR voltage has dropped to less than 50VAC within 2 seconds
after the run command has been removed, the SCR power fault will latch.
TACH (Tach Loss Fault) - If at ant time the motor armature voltage and tach feedback are
more than 20% different as is the case when the tach wires becomes disconnected or are
reversed, the tach loss fault will latch.
DIR (Direction Fault) - Indicates and disables the control when the tachometer's direction is
different from the command speed. If the speed reference direction is up and the tach moves
more than 10% in the down direction or if the speed reference direction is down and the tach
moves more than 10% in the up direction, the direction fault will latch.
MP (Positive Bridge Enabled) - Indicates the positive SCR bridge (motoring) is enabled.
MN (Negative Bridge Enabled) - Indicates the negative SCR bridge (regenerating) is enabled.
+/- 15 (Power Supplies OK) - Indicates the controls low voltage power supplies are present.
Revision: AA 2.2
Microflite Ultra 2000 - Amicon Regulator
Printed 03 - 15 - 03 7c - 7