Delta VFD-E

Chapter 4 Parameters|
Revision Jan. 2009, 06EE, SW--PW V1.12/CTL V2.12 4-61
 When the 2
nd
switch on the upper-right corner is set to be ON as shown in the following
diagram, the motor stop method (Pr.02.02) will force setting to 1. This setting (Pr.02.02) can’t
be changed till the 2nd switch is set to be OFF.
ON
123
 E.F. is external fault. It can be triggered by setting one of Pr.04.05~04.08 to 14. When the AC
motor drive receives the trigger, it will stop output immediately and display EF on the keypad.
The motor won’t run till the fault is cleared (enter “RESET).
 The parameter determines how the motor is stopped when the AC motor drive receives a valid
stop command or detects External Fault.
Ramp: the AC motor drive decelerates to Minimum Output Frequency (Pr.01.05)
according to the deceleration time(Pr.01.10 and Pr.01.12) and then stops.
Coast: the AC motor drive stops the output instantly upon command, and the motor
free runs until it comes to a complete standstill.
The motor stop method is usually determined by the characteristics of the motor load and
how frequently it is stopped.
(1) It is recommended to use “ramp to stop” for safety of personnel or to prevent
material from being wasted in applications where the motor has to stop after the
drive is stopped. The deceleration time has to be set accordingly.
(2) If motor free running is allowed or the load inertia is large, it is recommended to
select “coast to stop”. For example: blowers, punching machines, centrifuges
and pumps.
 Related parameters: Pr.01.10(Decel Time 1), Pr.01.12(Decel Time 2), Pr.04.05(Multi-function
Input Terminal (MI3)), Pr.04.06(Multi-function Input Terminal (MI4)), Pr. 04.07(Multi-function
Input Terminal (MI5)) and Pr.04.08(Multi-function Input Terminal (MI6))
NOTE
The digital keypad is optional. Please refer to Appendix B for details. When using without this optional
keypad, the FAULT LED will be ON once there is error messages or warning messages from the
external terminals.