Omron VARISPEED E7 User Manual page 188

L6-01 Set Value and Digital Operator Display
The relationship between alarms displayed on the Digital Operator when overload or loss of load is detected
and the setting in L6-01 is shown in the following table.
Set
Value
0 Load detection disabled
Overload detection only at speed agree, the operation is continued, a warning is out-
1
put.
Overload detection continuously during operation, operation continues, a warning is
2
output.
Overload detection only at speed agree, motor coasts to stop, Inverter is in fault condi-
3
tion.
Overload detection continuously during operation, motor coasts to stop, Inverter is in
4
fault condition.
Loss of load detection only at speed agree, the operation is continued, a warning is
5
output.
Loss of load detection continuously during operation, operation continues, a warning
6
is output.
Loss of load detection only at speed agree, motor coasts to stop, Inverter is in fault
7
condition.
Loss of load detection continuously during operation, motor coasts to stop, Inverter is
8
in fault condition.
Setting Example
The following diagram shows the time chart for overload and loss of load detection.
• Overload Detection
Motor current (output torque)
L6-02
Load detection 1 NO
Fig 6.27 Example Operation for Overload Detection
Function
* Overload detection switch off bandwidth is approxi-
mately 10% of the Inverter rated output current.
L6-03
Machine Protection
Operator
Inverter
Overload/Under-
condition
torque Detection 1
– –
OL3 flashes Alarm
OL3 flashes Alarm
OL3 lights up Fault
OL3 lights up Fault
LL3 flashes Alarm
LL3 flashes Alarm
LL3 lights up Fault
LL3 lights up Fault
L6-03
6-31