7.3.6 Dual Acceleration Ramp Control
General Two independent current ramps and kick currents may be programmed. The use of two different starting
profiles can be very useful with applications that have varying starting loads such as conveyors that can start
either loaded or unloaded.
The Current Ramp 1 profile is programmed using the parameters Initial Current 1, Maximum Current 1, and
Ramp Time 1. The Current Ramp 2 is programmed using the parameters Initial Current 2, Maximum Current
2, and Ramp Time 2. Kick Current 1 profile is programmed using the parameters Kick Level 1 and Kick Time
1. Kick Current 2 profile is programmed using the parameters Kick Level 2 and Kick Time 2.
Acceleration Ramp Selection Current Ramp 2 and Kick Current 2 starting profiles are selected by programming a digital input to the Ramp
Select function and then energizing that input by applying 120 Volts to it. When a digital input is
programmed to Ramp Select, but de-energized, Current Ramp 1 and Kick Current 1 are selected. When no
digital inputs are programmed to the Ramp Select function the Ramp 1 profile is used.
The Ramp Select input only affects the starting profile when using a current ramp profile and during a kick.
The Ramp Select input does not affect the TruTorque ramp, Power ramp, or the Voltage ramp profile (unless
kicking is enabled at the beginning of those ramps).
The following table summarizes which parameters affect the starting profile when a digital input is
programmed to the Ramp Select function and that input is either energized or de-energized.
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7 - THEORY OF OPERATION
Ramp Select De-energized Ramp Select Energized
Current Ramp
Initial Current 1 Initial Current 2
Maximum Current 1 Maximum Current 2
Ramp Time 1 Ramp Time 2
Kick Level 1 Kick Level 2
Kick Time 1 Kick Time 2
TruTorque Ramp
Initial Voltage/Torque/Power
Maximum Torque/Power
Ramp Time 1
Kick Level 1 Kick Level 2
Kick Time 1 Kick Time 2
Power (KW) Ramp
Initial Voltage/Torque/Power
Maximum Torque/Power
Ramp Time 1
Kick Level 1 Kick Level 2
Kick Time 1 Kick Time 2
Voltage Ramp
Initial Voltage/Torque/Power
Ramp Time 1
Kick Level 1 Kick Level 2
Kick Time 1 Kick Time 2
Ramp Modes
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