Operating Instruction - Frequency Inverter 230V / 400V ... - opis.cz

Via parameter time constant positioning contr. 479, the time constant for controllingthe positional error can be set. The value of the time constant should be increased ifoscillations of the drive around the reference orientation occur during the positioning.ParameterSettingsNo. Description Min. Max. Fact. sett.time constant positioning479controller1.00 ms 9999.99 ms 20.00 msTo make sure that the set position is maintained if a load torque is applied, a stoppingbehavior should be selected for parameter Operation Mode 630 which impresses astarting current either permanently when the drive is at a standstill or for the stoppingtime.The status message „60-Arrived at desired Position“ which is displayed when the referenceorientation is reached can be assigned to a digital output. The message isoutput on the following conditions:− Operation mode 2 (axis positioning) for parameter Operation Mode 458 is selected.− The controller release signal at digital input S1IND is switched on.− Start Positioning of Axle 37 is activated.− The speed sensor monitoring is activated, i.e. operation mode 2 (error message)for parameter Operation Mode 760 of the speed sensor monitoring is selected.− Operation mode 1004 or 1104 (quadruple evaluation with reference impulse) isselected for the speed sensor input.− The Actual Frequency 241 is lower than 1 Hz.− The deviation of the current position from the reference orientation is lower thanthe Max positional error 472.The current position after Start Positioning of Axle 37 is recognized by the frequencyinverter as follows:− During commissioning, after switching on the frequency inverter, a search mode isperformed for 3 rotations at a rotational frequency of 1 Hz in order to detect thereference signal. As soon as the reference signal was recognized twice, the driveis positioned to the Reference orientation 469.− If the motor was already rotating before axis positioning was enabled, the positioningto the Reference orientation 469 is performed without search mode becausethe position of the reference point was already detected by the frequencyinverter.If the positioning is carried out, after controller enabling and start command, whenthe motor is at a standstill:− The motor is positioned clockwise to the reference orientation if the value for thereference orientation is higher than the value adjusted before.− The motor is positioned anticlockwise to the reference orientation if the value forthe reference orientation is lower than the value adjusted before.The sense of rotation during the positioning is independent of whether Start Clockwiseor Start Anticlockwise was activated.The time required until the reference orientation is reached depends on:− Actual Frequency− Frequency ramp for deceleration− Rotational angle to reference orientation− Max positional error− time constant positioning controller96 02/06