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Appendix A-3MN894
Quick Reference Chart
Ramp Up Time (3-50 sec.)
Tachometer: Time to reach full speed.
Voltage: Time to reach full speed.
Torque Up (40-75% voltage)
Tachometer: Disabled.
Voltage: Initial starting voltage for ramp.
Current Limit (75-400% FLA)
Tachometer or voltage: Enabled by S2-5=ON. Maximum current during ramp up and ramp down.
Pulse Time (0-1.5 sec.)
Tachometer: Disabled.
Voltage: Duration of 400% FLA starting pulse.
Ramp Down Time (5-50 sec.) − (Disabled with S2-1=ON)
Tachometer: Time to reach zero speed.
Voltage: Time to reach zero speed.
Torque Down Advance (0-100%) − (Disabled with S2-1=ON)
Tachometer or voltage: Percentage reduction from full motor voltage for starting ramp down to zero volts.
Current Monitor (50-400% FLA) Enabled at end of start cycle.
S2-2=ON: If motor current exceeds CM value, control will shutdown, CUR MON contact will close and
CUR MON light is ON.
S2-2=OFF: Control will not shutdown, contact
will close, LED is ON.
Power Factor (0-100%)
0 to maximum allowable motor voltage
reduction to improve power factor.
Power applied to control.
Overcurrent shut down
(450% FLA)
S1 Current Calibration and “Motor Current” bar graph. S1 selects 255 calibration points for motor FLA.
See “Current Calibration Chart” in this section for the proper setting.
Bar Graph, displays the value of motor current during operation.
BP: S2-6, Bypass contactor enable.
ON Shunt trip circuit is disabled during full on condition for bypass contactor to be used.
OFF Shunt trip circuit is enabled in all conditions.
CL: S2-5, Current Limit enable.
ON Current will not exceed Current Limit adjustment during ramp up and down except during pulse start.
OFF Current Limit adjustment has no effect.
TACH: S2-4, Tachometer input enable.
ON Control is in tachometer feedback ramp mode.
OFF Control is in voltage ramp mode.
OC: S2-3, Over current shut down.
ON Overcurrent shutdown will turn on CUR MON light and close the CUR MON contact.
OFF Overcurrent shutdown will disable control with no affect to CUR MON light and contact.
CM: S2-2, Current Monitor Trip.
ON Control will disable and CUR MON light and contact will indicate an overcurrent condition.
OFF CUR MON light and contact will indicate an overcurrent condition.
RDD: S2-1, Ramp Down Disable.
ON Control is immediately disabled when the “Close to Run” input is opened.
OFF Control will ramp down when the “Close to Run” input is opened.
CUR MON: Indicates CM or CL have been exceeded.
MTR PWR: Indicates voltage is applied to motor
during start, run & ramp down.
TACH: Tachometer input (0-10VDC).
RAMP END: End of start ramp (full run condition).
SHUNT TRIP: Shunt trip due to shorted SCR.
START/RUN: Confirm Close to Run contact is closed.
CLOSE TO RUN: Start contact is closed.
CUR
MON
MTR
PWR
TACH
RAMP
END
SHUNT
TRIP
START/
RUN
CLOSE
TO RUN
RU
CL
S
T
A
R
T
+ −
− +
TU
− +
− +
PT
RD
+ −
− +
TD
CM
− +
PF
S
T
O
P
R
U
N
− +
50 3
40 75
75 400
0 1.5
50 5
0 100
50 400
0 100