LG C Series - Manual (Page 70)

Chapter 9. Basic functions
9.4 Accel/Decel time and unit setting
z Accel/Decel time setting based on Max frequency
Group LED Display Parameter Name
Set
Value
Min/Max
Range
Factory
Defaults
Unit
ACC [Accel time] - 0/6000 5.0 sec
Drive
group
dEC [Decel time] - 0/6000 10.0 sec
Function
group 1
F21 [Max frequency] - 0/400 60.0 Hz
H70
[Frequency Reference
for Accel/Decel]
0 0/1 0
Function
group 2
H71
[Accel/Decel Time setting
unit]
- 0/2 1
ƒ Set the desired Accel/Decel time at ACC/dEC in Drive group.
ƒ If H70 is set to 0 {Max frequency}, Accel/Decel time is the time that takes to reach the max freq
from 0 Hz.
ƒ Desired Accel/Decel time unit is settable at the H71.

Accel/Decel time is set based on F21 – [Max frequency]. For instance, if F21 is set to 60Hz,
Accel/Decel time 5 sec, and run frequency 30Hz, time to reach 30Hz would be 2.5 sec.
Run
command
Run Freq.
30Hz
Accel time Decel time
Max. freq.
60Hz
 More precise time unit can be set corresponding to load characteristics as shown below.
Code
Parameter Name
Setting
range
Set
value
Description
0.01~600.00 0 Unit: 0.01 sec.
0.1~6000.0 1 Unit: 0.1 sec.
H71
[Accel/Decel Time
setting unit]
1~60000 2 Unit: 1 sec.
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