LSIS LSLV-S100 - Timer Settings

216
Learning Protection Features
6.2.4 Speed Command Loss
When setting operation speed using an analog input at the terminal block, communication
options, or the keypad, speed command loss setting can be used to select the inverter operation
for situations when the speed command is lost due to the disconnection of signal cables.
Group
Code
Name
LCD Display
Parameter Setting
Setting range
Unit
Pr
12
Speed command loss
operation mode
Lost Cmd Mode
1
Free-Run
-
-
13
Time to determine
speed command loss
Lost Cmd Time
1.0
0.1-120
s
14
Operation frequency
at speed command
loss
Lost Preset F
0.00
Start
frequency–
Max. frequency
Hz
15
Analog input loss
decision level
AI Lost Level
0
Half of x1
-
OU
31
Multi-function Relay 1
Relay 1
13
Lost
Command
-
-
33
Multi-function output
1
Q1 Define
Speed Command Loss Setting Details
Code
Description
Pr.12 Lost Cmd Mode
In situations when speed commands are lost, the inverter can be configured to
operate in a specific mode:
Setting
Function
0
None
The speed command immediately becomes the
operation frequency without any protection
function.
1
Free-Run
The inverter blocks output. The motor performs in
free-run condition.
2
Dec
The motor decelerates and then stops at the time
set at Pr.07 (Trip Dec Time).
3
Hold Input
The inverter calculates the average input value for
10 seconds before the loss of the speed command
and uses it as the speed reference.
4
Hold Output
The inverter calculates the average output value for
10 seconds before the loss of the speed command
and uses it as the speed reference.
5
Lost Preset
The inverter operates at the frequency set at Pr. 14
(Lost Preset F).
Pr.15 AI Lost Level,
Pr.13 Lst Cmd Time
Configure the voltage and decision time for speed command loss when using
analog input.
Setting
Function
0
Half of x1
Based on the values set at In.08 and In.12,