LS ELECTRIC LSLV-H100 Series, User Manual

Page: 335 / 618

Learning Protection Features
322
Speed Command Loss Setting Details
Code Description
PRT-11 Lost KPD
Mode
Set the operation command source to keypad. If there is a communication
error with the keypad or connection problem between the keypad and the
inverter, select the inverter’s operation.
Setting Function
0 None
The speed command immediately becomes the
operation frequency without any protection function.
1 Warning
Select 24: Lost keypad from OUT-31
–36, one of the
multi function terminal blocks, outputs a relevant
warning signal when abnormal operating conditions
arise.
2 Free-Run
The inverter blocks output. The motor performs in
free-run condition.
3 Dec
The motor decelerates and then stops at the time
set at PRT-07 (Trip Dec Time).
PRT-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 PRT-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 PRT-
14 (Lost Preset F).
PRT-15 AI Lost
Level,
PRT-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, a
protective operation starts when the input signal is
reduced to half of the initial value of the analog input
set using the speed command (DRV-01) and it
continues for the time (speed loss decision time) set
at PRT-13 (Lost Cmd Time). For example, set the
speed command to ‘2 (V1)’ at DRV-07, and set IN-