Delta Electronics VFD-EL manual Combination of the First and Second Master Frequency Command

Chapter 4 Parameters

02.10Combination of the First and Second Master Frequency Command

		Factory Setting: 0
Settings	0	First Master Frequency Command Only
	1	First Master Frequency + Second Master Frequency
	2	First Master Frequency - Second Master Frequency

02.02Stop Method

			Factory Setting: 0
Settings	0	STOP: ramp to stop	E.F.: coast to stop
	1	STOP: coast to stop	E.F.: coast to stop
	2	STOP: ramp to stop	E.F.: ramp to stop
	3	STOP: coast to stop	E.F.: ramp to stop

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 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.

4-38 Revision August 2008, 2ELE, V1.02