Parameter No. Function name Data
Default
data
Unit
3004Hex-0DHex/
3009Hex-09Hex
1st Motor Electronic Thermal
Time Constant/2nd Motor Elec-
tronic Thermal T
ime Constant
*1
0.5 to 75.0 5.0 min
3003Hex-3CHex Motor Electronic Thermal Monitor 0 to 100 0 %
3008Hex-5AHex
Motor Electronic Thermal Over-
load Protection Data Retention
0: Disable
1: Enable
0 -
Related function Motor overload (alarm codes: 17, 18)
*1. To enable switching to the 1st and 2nd control, allocate “12: SET (2nd control)” to either of input terminal
[DI1] to [DI7].
Motor Electronic Thermal Level (3004Hex-0CHex/3009Hex-08Hex)
• Set the operation level of the electronic thermal for motor protection. To not use this function, set
0.00.
• Normally
, set to the motor continuous allowable current (generally, about 1.0 to 1.1 times the motor
rated current) when the motor is run at base frequency.
Motor Electronic Thermal Characteristic Selection
(3004Hex-0BHex/3009Hex-07Hex)
• Select the characteristics of the motor cooling system.
When Motor Electronic Thermal Characteristic Selection (3004Hex-0BHex/
3009Hex-07Hex) = 1: For a general-purpose motor with shaft-driven cool-
ing fan
• The figure below shows the electronic thermal operation characteristics. Characterization factors
α1 to α3 and their switching frequencies f2 and f3 differ according to the characteristics of the
motor
.
0
α
1
α2
α3
100
f2 f3 fb
Output frequency
f0(Hz)
fb = Base frequency
Actual operation level
1st Motor Electronic Thermal Level (3004Hex-0CHex)
However, fb = 60 Hz
if the base frequency is 60 Hz or higher.
(%)
• The following shows each factor that is set according to the motor characteristics selected by
motor capacity and motor type (induction motor/PM motor).
Induction motor (IM)
6 Basic Settings
6-19
M1 Series EtherCAT Type User’s Manual (I670)
6-3 Motor Parameter Settings
6
6-3-3 Motor Electronic Thermal Function
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