Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 191

5. PARAMETERS
5.3 Software limit
The limit stop with the software limit ([Pr. PT15] to [Pr. PT18]) is the same as the motion of the stroke end.
Exceeding a setting range will stop and servo-lock the shaft. This will be enabled at power-on and will be
disabled in the velocity mode, torque mode, and homing mode. Setting a same value to "Software limit +"
and "Software limit -" will disable this function. Setting a larger value to "Software limit -" than "Software limit
+" will disable this function.
Inhibited range
Movable range
Travel
Travel possible
impossible
Current position
Software limit
5 - 70