5.5 Operating Using Force Control with Analog Voltage Reference5-455 OperationUse the following steps to manually adjust the force reference offset.5.5.3 Speed Limit in Force ControlThis function limits the speed of the servomotor to protect the machine.The reference force is used to control the servomotor but not the motor speed. If the reference force for theload of the machine is too large, the force of the motor may be greater than the load of the machine. The motorwill move at a much greater speed. If so, use this function to limit the speed.Note: If the control speed is not within the limit, the function tries to return the speed within the limit using a negativefeedback of force in proportion to the difference from the limited speed. Therefore, the actual limit value of motorspeed depends on the load conditions of the motor.Refer to the following parameters for speed limit.Step Display afterOperation Keys Description1 Press the MODE/SET Key to select the utility functionmode.2 Press the UP or the DOWN Key to select Fn00B.3 Press the DATA/SHIFT Key for approximately one sec-ond. The display shown on the left appears.4 Turn ON the servo ON (/S-ON) signal. The display shownon the left appears.5 Press the DATA/SHIFT Key for less than one second. Theforce reference offset amount is displayed.6 Press the UP or the DOWN Key to adjust the amount ofoffset.7Press the DATA/SHIFT Key for less than one second.The display shown on the left appears.Then "donE" blinks on the display, and offset amount isset.8 Press the DATA/SHIFT Key for approximately one sec-ond. "Fn00b" is displayed again.MODE /SET DATA/MODE/SET DATA/MODE/SET DATA/MODE/SET DATA/MODE/SET DATA/MODE /SET DATA/MODE/SET DATA/With No Speed Limit With Speed LimitMotor speedMaximum speedVDanger of damage due tocritical speed. SpeedSpeed limitVSafe operation withspeed limit.
