Overload Characteristics (Electronic Thermal Function) - Omron R88D-KN01L-ECT-L User Manual

3-2 Overload Characteristics
(Electronic Thermal Function)
An overload protection function (electronic thermal) is built into the Servo Drive to protect the drive and
Linear Motor from overloading.
An overload error will occur according to the timing characteristic if the feedback value for the force
command exceeds the overload level.
The overload level is dependent on the Overload Detection Level Setting (3512 hex) and the timing
characteristic on the Motor Overload Curve Selection (3929 hex), respectively. Be sure to set the
Overload Detection Level Setting according to the environment in which the Servo Drive is used.
Index Name
3512 Overload Detection
hex Level Setting
3929 Motor Overload
hex Curve Selection
The Motor Overload Curve Selection (3929 hex) will be set automatically based on the selected Motor
Coil Unit model when the Linear Motor settings are initialized.
Set value
0
1
2
3
4
5
6
7
If an overload error occurs, first eliminate the cause of the error and then wait at least 1 minute for the
motor temperature to drop sufficiently (for both the Motor Coil Unit and the Magnet Track) before turning
ON the power again.
If the error reset is repeated at short intervals, the motor may burn out.
The following graphs show the motor overload characteristic curves that can be selected in the Motor
Overload Curve Selection (3929 hex), where the horizontal axis represents the load ratio and the
vertical axis represents electronic thermal operation time.
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
Setting
Unit
range
% 0 to 500 Set the overload detection level.
– 0 to 7
Thermal time
constant
20 -
36 R88L-EC-GW-0303/-0306/-0309
72 R88L-EC-GW-0503/-0506/-0509
96 R88L-EC-GW-0703/-0706/-0709
110 R88L-EC-FW-0303/-0306
124 R88L-EC-FW-0606/-0609/-0612
126 R88L-EC-FW-1112/-1115
200 Servo Drive protection only
Description
If set to 0, the overload level will be 115%. If set to 115
or higher, this will be restricted internally to 115%.
This represents one of the overload detection
characteristic values that correspond to eight
thermal time constants.
It is set automatically according to the selected
motor model when the Linear Motor settings are
initialized. The default setting is 0.
Motor Coil Unit model
3 Specifications
Reference
P. 9-43
P. 9-70
3 - 25
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