Delta Electronics AC Motor Drive VFD-E - Manual (Page 101)

Chapter 4 Parameters|
4-48 Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
01.20 Delay Time at 0Hz for Simple Position Unit: 0.01
01.21 Delay Time at 10Hz for Simple Position Unit: 0.01
01.22 Delay Time at 20Hz for Simple Position Unit: 0.01
01.23 Delay Time at 30Hz for Simple Position Unit: 0.01
01.24 Delay Time at 40Hz for Simple Position Unit: 0.01
01.25 Delay Time at 50Hz for Simple Position Unit: 0.01
Settings 0.00 to 600.00 sec Factory Setting: 0.00
This simple position function is calculated by the measure of operation area. When the multi-
function input terminal is set to 25 and it is ON, it will start to decelerate after getting the delay
time from Pr.01.20 to Pr.01.25 and get the final position.
This is simple position function NOT the precision position function.
f
t
MI=25
t2 tx
( )
⎟
⎠
⎞
⎜
⎝
⎛ + +
× =
2
S 2
t t t
f x x
Assume that the radius of the 4-pole motor is r and rotation speed is n (rpm).
r
n
Example 1:
Assume that motor speed is 50Hz, the delay time at 50Hz is 2 sec (Pr.01.25=2) and the
deceleration time from 50Hz to 0Hz is 10 seconds.
The rotation speed n = 120 X 50 /4 (rpm/min) = 25 rpm/sec
The revolution numbers = (25 X (2+12))/2 = 175 (revolutions)
f
(Hz)
t
MI=25
2sec 10sec
50