Parker EME Compax3 Accessories192-120114 N5 C3I22T11 June 2008 3479.1.1.1 Feedback systems for direct drivesThe Feedback option F12 makes it possible to operate linear motors as well astorque motors. Compax3 supports the following feedback systems:Special encoder systems fordirect drives Option F12Analog hall sensors Sine - cosine signal (max. 5Vss; typical 1Vss)90° offset U-V Signal (max. 5Vss; typical 1Vss) 120° offset.Encoder(linear or rotatory) Sine-cosine (max. 5Vss; typical 1Vss) (max.400kHz) or TTL (RS422) (max. 5MHz)with the following modes of commutation: automatic commutation (see page 347) or Digital hall sensors (e.g. DiCoder ©)Digital, bidirectional interface All EnDat 2.1 or EnDat 2.2 feedback systemswith incremental track (sine-cosine track) linear or rotary max. 400kHz Sine-CosineDistance coded feedback sy-stems Distance coding with 1VSS - Interface Distance coding with RS422 - Interface (Enco-der)The motor performs automatic commutation after: Power on, A configuration download or An IEC program downloadThe time duration (typically 5-10 sec) of automatic commutation can be optimizedwith the start current (see in the optimization display of the C3 ServoManager;given as a percentage of the reference current). Note that values that are too highwill cause Error 0x73A6 to be triggered.Typically the motor moves by 4% of the pitch length or, with rotary direct drives 4%of 360°/number of pole pairs - maximum 50%.Note the following conditions for automatic commutation During automatic commutation the end limits are not monitored. Actively working load torques are not permitted during automatic commutation. Static friction deteriorates the effect of automatic commutation. With the exception of missing commutation information, the controller/motor com-bination is configured and ready for operation (parameters correctly assigned forthe linear motor/drive). The feedback and the direction of the field of rotation ineffect must match. The auto-commutating function must be adapted to fit the mechanics if necessaryduring commissioning.
