4.3 Trial Operation for Servomotor without Load from Host Reference4-94 Trial Operation4.3.4 Trial Operation in Position ControlPerform the following steps for trial operation in position control. The steps are specified on the condition thatinput signal wiring for the position control has been completed according to 4.3.1 Inspecting Connection and Sta-tus of Input Signal Circuits.Step Operation Reference1 Recheck the power supply and the input signal circuits, and turn ON the controlpower supply.3.2.5 Example of I/O Sig-nal Connections in Posi-tion Control2 Set the reference pulse form with Pn200.0 according to the output pulse form of thehost pulse reference device.5.4.1 Basic Settings forPosition Control Mode3 Set the reference unit, and then set the electronic gear ratio according to the host.The electronic gear ratio is set in Pn20E and Pn210. 5.4.3 Electronic Gear4 Turn ON the main circuit power supply.5 Turn ON the servo ON (/S-ON) input signal.6Output a low-speed pulse reference for an easy-to-check number of rotations (e.g.,one rotation) from the host.7Check the number of reference pulses input to the SERVOPACK from the changes inthe input reference pulse monitor before and after the reference.The input reference pulse monitor can be checked with Un00C.8Check the actual number of motor rotations from the changes of the feedback pulsemonitor before and after the reference.The feedback pulse monitor can be checked with Un00D.9 Check that step 7 and step 8 satisfy the following formula.Un00D = Un00C × (Pn20E/Pn210)10Check that the servomotor is rotating in the direction specified by the reference.Note: To switch the motor rotation direction without changing the polarity of theanalog speed reference, refer to 5.2.2 Servomotor Rotation Direction5.2.2 Servomotor Rota-tion Direction11 Input a pulse reference for a comparatively large number of motor rotations from thehost so that the motor will rotate at a constant speed.12Check the reference pulse speed input to the SERVOPACK from the input reference pulse speed (min -1 ).The input reference pulse speed can be checked with Un007.Note: Obtain Un007 from the following formula (if the model uses a 20-bit encoder).13 Check the motor speed (min-1 ).The motor speed can be checked with Un000.14 Check that the values in step 12 and step 13 (Un007 and Un000) are equal to eachother.15 Stop the pulse reference and turn OFF the servo ON (/S_ON) signal.Note: To ensure safe, set the reference pulse speed so that the motor speed will bearound 100 min-1 .Un007 input reference pulse㨇pulses/S㨉× 60 × Pn210Pn20E 12 13107220×Reference input ppm Electronicgear ratioEncoderpulse
