Delta Electronics VFD-E manual 10.16

Chapter 4 Parameters

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.

4-136 Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11