JX Quick Start Guide 23
PROGRAMMING JX
3.13 Electronic thermal function
This function electronically protects the motor from overheating.
• Causes an overload trip (E05) 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 a standard motor cooling capabil-
ity at a low speed.
• To set a value over the rated current of the motor, be careful of any temperature rise of the motor.
* To switch to the 2nd control, allocate 08 (SET) to the multi-function input terminal and then turn it on.
Electronic thermal level (motor protection level)
(Example) 3G3JX-AB007, rated current: 4.0 A, setting range: 0.8 to 4.0 A.
Electronic thermal characteristics
Frequency characteristics are multiplied by the b012/212 set value above. The lower the output frequency is, the lower the cool-
ing capability of the standard motor’s self-cooling fan.
• Reduced torque characteristics 1 - Multiplied by the time limit characteristics set in b012/212 for each frequency.
• 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 limit characteristics set in b012/212 for each frequency.
Parameter Parameter name Description
b012 Electronic thermal level 0.2 x Rated current to 1.0 x Rated current
b212* 2nd electronic thermal level
b013 Electronic thermal characteristics selection 00: Reduced torque characteristics 1
01: Constant torque characteristics
02: Reduced torque characteristics 2
b213* 2nd electronic thermal characteristics
selection
Related parameters C021
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