Options for calibrating an absolute value encoderThe frequency converter ZETADYN 3C has two different methods of calibrating the absolute valueencoder:• load-free calibration of theabsolutevalue encoder• calibration of the absolute value encoder with brake closedGeneral conditions required for an encoder alignment without load:• The installation and motor data must be configured• Load-free operation (ropes must be removed from the traction sheave)• Brake monitoring must be activated corresponding to the number and type of brakes in use (Monitoring/BR menu)• Contactor monitoring must be configured according to the type of contact for monitoring (Monitor-ing/CO menu)•General conditions required for an encoder alignment closed brake:• The installation and motor data must be configured• It must be ensured that the brake does not open during the calibration (disconnect brake)• Brake monitoring must be activated corresponding to the number and type of brakes in use (Monitoring/BR menu)• Contactor monitoring must be configured according to the type of contact for monitoring (Monitor-ing/CO menu)15.2.1 Load-free alignment SSI-EncoderWhen aligning the SSI encoder, the frequency inverter supplies the motor with direct current. Duringthis, the rotor jumps to the middle of the nearest magnetic poles. In this rotor position, the absoluterotary encoder must be manually aligned to its zero point. To ease installation, it is recommended toconnect the encoder to the frequency inverter before installation and to align the offset value "0"(value in Encoder-adjust./ENC_POS menu). After that, mount the encoder into position - shifting aslittle as possible – into the position in which the terminal screw is easily accessible.InformationThe calibration should always be done twice. Any inaccuracy in the 1st calibration is detected by the2nd calibration and can be corrected.If the encoder terminal screw is not accessible in the "ENC_POS = 0" position, the encoder can beadjusted to the value of any pole pair (see table).Pole pair ZAtop driveSM 160 / SM200 / SM225 / SM250ZAsyn driveSM700 / SM8601 0 02 819 5463 1638 10924 2458 16385 3277 21856 4096 27317 4915 32778 5734 38239 6554 436910 7373 491511 - 546112 - 600713 - 655414 - 710015 - 7646Original operating instructionsZETADYN 3C Special functionsR-TBA08_03-GB 1619 Part.-No. 00163322-GB156/204
