Electronic Thermal Function - Omron SYSDRIVE MX SERIES User Manual

4-2 Function Mode

Electronic Thermal Function

•This function electronically protects the motor from overheating.
Parameter No.
b012
b212
b013
b213
4
Related functions
* To switch to the 2nd control, allocate 08 (SET) to the multi-function input and then turn it on.
•Causes an overload trip (E06) to protect the motor from overheating by setting according to the
motor rated current.
•Provides the most appropriate protection characteristics, taking into account the decline of the
motor cooling capability at a low speed.
•To set a value over the rated current of the motor, be careful of any temperature rise of the motor.
Electronic Thermal Level (Motor Protection Level)
(Example) 3G3MX-A2007
•The following figure shows the time limit characteristics with the electronic thermal level (b012) set
to 5.0 A.
Electronic Thermal Characteristics
•Frequency characteristics are multiplied by the b012/212 set value shown above.
•The lower the output frequency is, the lower the cooling capability of the standard motor's self-
cooling fan.
4-27
Function name
Electronic thermal level
0.2 × Rated current to 1.2 × Rated
* 2nd electronic thermal
current
level
Electronic thermal
00: Reduced torque characteristics 1
characteristics selection
01: Constant torque characteristics
* 2nd electronic thermal
02: Reduced torque characteristics 2
characteristics selection
Rated current: 5.0 A
Setting range: 1.0 to 6.0 A
Trip time (s)
60
4
0
5.8 7.5
(116%)
(150%)
Data
C021 to C022, C026
Motor current (A)
(Ratio to the rated current of the Inverter)
10.0
(200%)
Default setting Unit
Rated current A
Rated current A

00