Omron JX

4-33
4-2 Function Mode
4
Functions
Constant Torque Characteristics
•Do not skip this setting when using a constant torque motor.
•Multiplied by the time limit characteristics set in b012/212 for each frequency.
Reduced Torque Characteristics 2
•Multiplied by the time limit characteristics set in b012/212 for each frequency.
Overload Limit/Overload Warning
This function helps prevent an overcurrent trip due to rapid load fluctuation in acceleration or
constant speed operation.
* To switch to the 2nd control, allocate 08 (SET) to the multi-function input terminal and then turn it on.
Electronic thermal level
X1.0
X0.667
0
560
Inverter output
frequency (Hz)
(Example) JX-AB007 (Rated current: 4.0 A), b012 = 4.00 (A),
Output frequency = 2.5 Hz
Trip time (s)
Motor current (A)
(Ratio to the rated current of the Inverter)
60
4
0
3.1
(77.4%)
4.0
(100%)
5.32
(133%)
Electronic thermal level
X1.0
X0.8
0
20 60
Inverter output
frequency (Hz)
(Example) JX-AB007 (Rated current: 4.0 A), b012 = 4.00 (A),
Output frequency = 40 Hz
Time before trip (s)
Motor current (A)
(Ratio to the rated current of the Inverter)
60
4
0
4.16
(104%)
5.4
(135%)
7.2
(180%)
Parameter No. Function name Data Default setting Unit
b021 Overload limit selection
00: Disabled
01: Enable in acceleration/constant
speed operation
02: Enabled in constant speed
operation
01 ⎯
*
b221
2nd overload limit
selection
01 ⎯
b022 Overload limit level
0.1 × Rated current to 1.5 × Rated
current
1.5 × Rated
current
A
*
b222 2nd overload limit level
1.5 × Rated
current
A
b023 Overload limit parameter
0.1 to 3000.0
(Deceleration time while this function
is in operation)
1.0 s
*
b223
2nd overload limit
parameter
1.0 s
b028
Overload limit source
selection
00: b022, b222 set values
01: Input terminal O
00 ⎯
*
b228
2nd overload limit source
selection
00 ⎯
C041 Overload warning level
0.0: Does not operate.
0.1 × Rated current to 2.0 × Rated
current (Outputs OL signal when the
overload warning level is reached.)
Rated current
A
*
C241 2nd overload warning level Rated current
Related parameters C021, C026