Overload Warning - Omron JX User Manual

4-2 Function Mode
•The Inverter monitors the motor current during acceleration or constant speed operation. If it
reaches the overload limit level, the output frequency is lowered automatically according to the
overload limit parameter.
•The overload limit level sets a current value for this function to work.
•When this function operates, the acceleration time becomes longer than the set time.
• With the overload limit parameter set too low, an overvoltage trip may occur due to regenerative
energy from the motor. This is because of automatic deceleration from this function even during
acceleration.
• Make the following adjustments if this function operates during acceleration and the frequency
doesn't reach the target level.
•Increase the acceleration time.
•Increase the torque boost.
•Increase the overload limit level.
4
•Use a higher rank Inverter.
•You can change the level setting in the overload limit source selection. With 00 selected, the set
values of b022 and b222 are applied to the overload limit level. With 01 selected, the analog
voltage input between O and L is enabled, and 10 V here corresponds to 150% of the rated current.
Note that 01 can be set only if PID is disabled and the AT terminal is not set.

Overload Warning

•If the load is too large, this function outputs an overload warning signal, allowing you to readjust
the overload level.
This helps prevent mechanical damage due to an overload in the conveyors, or an operation line
stop due to an overload trip of the Inverter.
•Allocate 03 (OL) to any of multi-function output terminal 11 or relay output terminals..
Data
03
Available output terminals
Required settings
•
Parameter No.
C041
4-34
Overload limit level
b022
Output current
Max. frequency
A004/A204
Inverter output
frequency
Symbol Function name
OL Overload warning
Function name
0.0: Does not operate.
0.1 to Rated current × 200%:
Overload warning level
Deceleration set by the overload
limit parameter
b023
Status
The Inverter output current has exceeded the
ON
C041 set value.
The Inverter output current has not reached the
OFF
C041 set value.
11-CM2, AL2-AL0 (or AL1-AL0)
C021, C026, C041
Data
Outputs OL signal when reaching the
overload warning level.
Target frequency
F001
Description
Default setting
Rated current
Unit
A