Start Mode
CFN 01
LCD Display
Range
LCD
Description
Voltage Ramp
Open Loop Voltage acceleration ramp.
Current Ramp
Current control acceleration ramp.
(Default)
TT Ramp
TruTorque control acceleration ramp.
Power Ramp
Power (kW) control acceleration ramp.
Tach Ramp
Tachometer control acceleration ramp.
Description
The Start Mode parameter allows the selection of the optimal starting ramp profile based on the application.
The closed loop current control acceleration ramp is ideal for starting most general-purpose motor
applications. Ex: crushers, ball mills, reciprocating compressors, saws, centrifuges, and most other
applications.
The closed loop TruTorque control acceleration ramp is suitable for applications that require a minimum of
torque transients during starting or for consistently loaded applications that require a reduction of torque
surges during starting. Ex: centrifugal pumps, fans, and belt driven equipment.
The closed loop power control acceleration ramp is ideal for starting applications using a generator or other
limited capacity source.
In addition to the basic motor and starter setup variables, the following needs to be done to use the tachometer
feedback control ramp:
1. Connect a tachometer with appropriate DC output voltage and correct polarity to the MX
3
power card input (TB5-2(+input), TB5-3(-input)).
2. The start mode (CFN01) is to be selected as Tach Ramp.
3. Program Tachometer Full Speed Voltage (FUN13).
4. Program Tachometer Loss Time (FUN14).
5. Program Tachometer Loss Action (FUN15).
6. Set the Initial Current Level (CFN03) to the desired current limit.
7. Set the Maximum Current Level (CFN04) to the desired maximum current limit.
See Also
Initial Voltage/Torque/Power (CFN08) on page 81.
Maximum Torque/Power (CFN09) on page 81.
Acceleration Ramp Profile (CFN10) on page 83.
Theory of Operation section 7.3, Acceleration Control on page 148.
Ramp Time 1
CFN 02
LCD Display
Range
0 – 300 seconds
(Default 15)
78
6 - PARAMETER DESCRIPTION
CFN: Ramp Time 1
02
15 sec
CFN: Start Mode
01
Current Ramp
Содержание RediStart MX3 Series
Страница 9: ...1 Introduction 1...
Страница 15: ...2 Technical Specifications 7...
Страница 35: ...3 Installation 27...
Страница 61: ...4 Keypad Operation 53...
Страница 71: ...5 Parameter Groups 63...
Страница 79: ...6 Parameter Description 71...
Страница 145: ...7 Theory of Operation 137...
Страница 188: ...NOTES 180 7 THEORY OF OPERATION...
Страница 189: ...8 Troubleshooting Maintenance 181...
Страница 208: ...NOTES 200 8 TROUBLESHOOTING MAINTENANCE...
Страница 209: ...Appendices 201...
Страница 237: ...Publication History Revision Date ECO 00 12 15 06 Initial Release...