Delta VFD-EL-W Series User Manual

Chapter 4 Parameters｜VFD-EL-W
141
seconds, then the deviation is 0.2 kg (4 kg × 5% = 0.2 kg). It means when the feedback value is
higher than 3.8 kg for a time exceeding 15 seconds, the AC motor drive decelerates to stop, this
deceleration time acts according to Pr.01.12.
Case 1: Assume that when the AC motor drive does not run and is in a constant pressure status,
the variation of the feedback value is less than 0.12 kg (4 kg × 3% = 0.12 kg) within 0.5 second.
When the feedback value continues to decrease to make the deviation of the set point be less
than 1 kg (4 kg × 25% = 1 kg), that is, when the feedback value is less than 3 kg, the AC motor
drive starts to run.
Case 2: When the AC motor drive is in constant pressure status, it does not operate until the
feedback change value exceeds 0.12 bar within 0.5 seconds, which means the AC motor drive
starts operating when the feedback value is less than 3.88 bar within 0.5 seconds.
10.27
Reserved
10.28
Reserved
10.29
Reserved
10.30
Reserved
10.31
Reserved
10.32
Reserved
10.33
Reserved
10.35
Multi-Pump Operation Mode
Default: 0
Settings
0–2
00: Disable
01: Fixed time circulation (alternative operation)
02: Fixed quantity control (multi-pump operating at constant pressure)
 When using the multi-pump control mode, you must set Pr.10.35 for each pump to the same
value.
10.36
Multi-Pump ID
Default: 0
Settings
0–4
0: Disable multi-pump function
1: Master
2–4: Slave
 When using the multi-pump control mode, the settings of each pump for Pr.10.36 cannot be the
same.

10.37
Multi-Pump Fixed Time Circulation Period
Default: 60
Settings
1–65535 min.
 Fixed time circulation mode (alternative operation): Assume that when pump #1’s operating time
is longer than the setting for Pr.10.37, pump #1 stops, and then pump #2 activates, and so on.

Delta VFD-EL-W Series Specifications

General

Brand	Delta
Model	VFD-EL-W Series
Category	DC Drives
Language	English