Mitsubishi Electric MEsoftstart/I01 Users, Installation & Instruction Manual page 69

Parameters
Protection Class
RPM Sensor Presence
Basic Setup – Start Ramp
Parameters that specify the start-up ramp time for the motor are configured under this group:
Parameters
Start Type
Ramp Type Lin/RMS/S
69 Basic operation – Pro models
Description - with options or range
If set to "Don't care" the soft starter will allow the motor to start in the direction of the present
direction of rotation of the phases.
If the direction of rotation of the motor is important, the Phase Rotation should not be set to
"Don't care". This bypasses the built-in protection that the soft starter provides.
This parameter can take a value of 2, 5, 10, 20 and 30 and represents the tripping class for motor
overload protection.
This parameter should be set when a shaft sensor is fitted for the Soft starter to measure motor speed in
RPM.
Description - with options or range
This parameter defines the different starting types that may be configured for the motor. They are:
[Ramp-up, Pedestal, Kickstart, Constant Current]
These parameters can be configured in the Advanced Setup (refer paragraph 6.4.4).
Note that this parameter is not used when Start Type is Constant Current
This parameter specifies the Ramp type that will be used during motor start and stop. Options are
[Linear Time, Linear RMS, and S-Curve]. Default is Linear Time. The selected profile will be applied to
the motor during starting and stopping (Ramp, Kickstart or Pedestal)
Adjusting the ramp type is an advanced feature of the soft starter.
Linear RMS:
This setting implies that a linear RMS voltage will be applied to the motor during starting and stopping
(Ramp, Kickstart or Pedestal). Linear RMS is shown in the graphs (the RED line)
Linear Time:
This setting will result in the RMS voltage applied to the motor as shown in the graph (the BLUE line).
S-Curve:
A Ramp type setting of 'S-Curve' will result in the RMS voltage that is applied to the motor as shown in
the graph (the BLUE line).