Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 119

4. STARTUP
4.5.2 Motor-less operation in controller
(1) Motor-less operation
Without connecting the servo motor to the servo amplifier, output signals or status displays can be
provided in response to the controller commands as if the servo motor is actually running. This operation
may be used to check the controller sequence. Use this operation with the forced stop reset. Use this
operation with the servo amplifier connected to the controller.
To stop the motor-less operation, set "Disabled (_ _ _ 0)" of "Motor-less operation selection" in [Pr.
PC05]. The motor-less operation will be disabled from the next power-on.
(a) Load conditions
(b) Alarms
The following alarms and warning do not occur. However, the other alarms and warnings occur as
when the servo motor is connected.
Alarm and warning
[AL. 16 Encoder initial communication error 1]
[AL. 1E Encoder initial communication error 2]
[AL. 1F Encoder initial communication error 3]
[AL. 20 Encoder normal communication error 1]
[AL. 21 Encoder normal communication error 2]
[AL. 25 Absolute position erased]
[AL. 28 Linear encoder error 2]
[AL. 2A Linear encoder error 1]
[AL. 2B Encoder counter error]
[AL. 92 Battery cable disconnection warning]
[AL. 9F Battery warning]
[AL. 70 Load-side encoder error 1]
[AL. 71 Load-side encoder error 2]
POINT
Connect the controller to the servo amplifier before the motor-less operation.
The motor-less operation using a controller is available with rotary servo motors
only. It will be available with linear servo motors and direct drive motors in the
future.
Load item
Load torque
Load to motor inertia ratio
Rotary servo
motor
Same as the moment of inertia of the servo motor
Linear servo motor
4 - 16
Condition
0
Rotary servo motor in
Direct drive motor fully closed loop
system