Omron VARISPEED L7 User Manual

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Adjusting the Torque Limit Integral Time (L7-06)
In Open Loop Vector control, during constant speed the limit function works with an integral control part (dur-
ing acceleration and deceleration just a P-control is used). Normally there is no need to change this setting.
• Increase the setting if vibrations or short cycle oscillations occur when the motor is running at the set
torque limit
• Decrease the setting if long cycle oscillations occur when the motor is running at the set torque limit.
 Enabling the Torque Limit Integral Operation during Accel./Decel. (L7-07)
In Open Loop Vector control an integral operation can be applied to the torque limit function (P-control is
standard). This improves the torque limit responsiveness and smoothes the torque limit operation. To enable
the integral operation set parameter L7-07 to 1. The integral time set in parameter L7-07 is used.
Setting Precautions
• When the output torque reaches the torque limit, control and compensation of the motor speed is disabled
to prevent the output torque from exceeding the torque limit. The torque limit has the priority.
• The torque limit accuracy is ±5% at an output frequency of 10 Hz or above. When output frequency is
lower than 10 Hz, the accuracy is lower.
 Motor Overload Protection
The motor can be protected from overload using the built-in electronic thermal overload relay function.
Related Parameters
Multi-Function Outputs (H2-01 to H2-03)
Setting the Motor Rated Current (E2-01, E4-01 or E5-02))
Set the rated current value on the motor nameplate in parameters E2-01 (for motor 1), E4-01 (for motor 2) or
E5-02 (PM motor). This set value is the base current for the internal thermal overload calculation.
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
E2-01 Motor 1 rated current
7.00 A
*1
*1. Factory settings depend on Inverter capacity. (The given value is for a 400 V Class Inverter with 3.7 kW.)
No Q Q Q -
E4-01 Motor 2 rated current
7.00 A
*1
No Q Q Q -
E5-02 PM Motor rated current
7.31 A
*1
No Q Q Q -
L1-01 Motor protection selection 1 No Q Q Q A
L1-02 Motor protection time constant 1.0 min No A A A -
Set
Value
Function
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
Closed
Loop
Vector
(PM)
1F Motor overload (OL1, including OH3) pre-alarm (ON: 90% or more of the detection level) Yes Yes Yes Yes

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English