Speed Command Loss - Larsen & Toubro C*2000 Series User Manual

Chapter 10 Protective Functions

10.7 Speed command loss

Group Code
I/O Group
I16
I62
I63
I55
Select the Drive mode when frequency reference set via Analog (V, I) input te

rminal or communication option is lost.
 I16 Select criteria for analog speed command loss
I16 Select criteria for a
nalog speed
command loss
Ex 1) The inverter determines the freq reference is lost when DRV- Frq is
set to 3 (Analog V input), I 16 to 1 and analog input signal is less
than half the value set in I 7.
Ex 2) The inverter determines the freq reference is lost when DRV- Frq is
set to 5 (V2+I), I16 to 2 and V2 input signal is either below the value
set in I2 or I input value is less than the I 12 value.
 I62: When no frequency command is given for the time set in I63, set the drive
mode as the table below.
I62 Drive mode select
after loss of
frequency command
 I55: Multi-function relay is used to output information on loss of frequency
 command to external sequence.
Ex) when I16 is set to 2, I62 to 2, I63 to 5.0 sec and I55 to 11, respectively
10-7
Parameter
Select criteria for analog
speed command loss
Drive mode select at loss
of speed command
Wait time after loss of
speed Command
Multi-function relay select
0
1
2
Continuous operation with the frequ
0
ency before command loss occurs
1 Free run stop (output cut off)
2 Decel to stop
Set Value Range
0 0 ~ 2
- 0 ~ 2
- 0.1 ~ 120.0 1.0
11 0 ~ 19
Not used
When half the value set in I2, I7, I12
is Entered
When less than the value set in I2,
I7, I12 is entered
Initial Unit
0
0
Sec
17
Cx2000 AC Drive