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Characteristics
10
Specifications
10.1
Characteristics
10.1.1
Load diagram
An electronic thermal relay is built into the servo amplifier to protect the servo motor and servo
amplifier from overloads. The working diagrams for load monitoring are presented in the
following figures. Overload 1 alarm (50) occurs if overload operation performed is above the
electronic thermal relay protection curve. Overload 2 alarm (51) occurs if the maximum current
flowed continuously for several seconds due to machine collision, etc. In the diagrams the area
underneath the solid or dotted lines represents the normal working range. The dotted line
represents the load curve when the servo motor has stopped. In a machine like the one for
vertical lift application where unbalanced torque will be produced, it is recommended to use the
machine so that the unbalanced torque is 70% or less of the rated torque.
HC-KFS
HC-MFS
HC-SFS
Fig. 10-1: Load diagrams MR-J2S-10B to MR-J2S-100B, MR-J2S-60B4 and MR-J2S-100B4
HC-SFS
HC-RFS
Fig. 10-2: Load diagrams MR-J2S-200B, MR-J2S-350B, MR-J2S-200B4 and MR-J2S-350B4
MELSERVO J2-Super
100 0
100
10
Servo lock
1
0,1
0
50
100
150
Load ratio [%]
100 0
100
Servo lock
10
1
0,1
0
50
100
150
Load ratio [%]
Specifications
Rotation
200
250
30
Rotation
200
250
30
S000932C
S000933C
10 - 1
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