Delta Electronics VFD-EL manual 10.16

Chapter 4 Parameters

When the actual frequency command > Pr.10.16 and the time exceeds the setting of Pr.10.14, the AC motor drive will restart.

When the AC motor drive is in sleep mode, frequency command is still calculated by PID. When frequency reaches wake up frequency, AC motor drive will accelerate from Pr.01.05 minimum frequency following the V/f curve.

The wake up frequency must be higher than sleep frequency.

Frequency

			frequency calculated by PID
10.16	The limit of
	decel. time			output
				frequency
10.15
01.05				The limit of
				accel. time
				Time
	10.14
	Fmin		lower bound	Fsleep
			of frequency
		lower bound
Fcmd=0	Fmin<Fsleep< of frequency

Fout = 0

When output frequency ≤ sleep frequency and time > detection time, it will go in sleep mode. When min. output frequency ≦ PID frequency ≦ lower bound of frequency and sleep function is enabled (output frequency ≤ sleep frequency and time > detection time), frequency will be 0 (in sleep mode). If sleep function is disabled, frequency command = lower bound frequency.

When PID frequency < min. output frequency and sleep function is enabled (output frequency

≤sleep frequency and time > detection time), output frequency =0 (in sleep mode).

If output frequency ≤ sleep frequency but time < detection time, frequency command = lower frequency. If sleep function is disabled, output frequency =0.

4-104 Revision August 2008, 2ELE, V1.02