AKD™ Installation Manual - TG Drives

AKD Installation | 6 Technical description and data6.16 Stop-/Emergency Stop- FunctionWith the personnel safe, approved restart lock STO (see page 54) the drive canbe secured on standstill (torque-free) using its internal electronics so that evenwhen power is being supplied, the drive shaft is protected against unintentionalrestart (IEC 61508 SIL 2).If the “Safety” option card is integrated, it provides safe drive functions inaccordance with IEC 61800-5-2 (in process)6.16.1 Stop: StandardsThe stop function shuts down the machine in normal operation. The following stop functions are defined byIEC 60204:• Category 0:Shut-down by immediate switching-off the energy supply to the drive machinery (this is an uncontrolledshut-down).• Category 1:A controlled shut-down, whereby the energy supply to the drive machinery is maintained to perform theshut-down, and the energy supply is only interrupted when the shut-down has been completed.• Category 2:A controlled shut-down, whereby the energy supply to the drive machinery is maintained.The parameter DRV.DISMODE must be set to 2 to implement the different stopcategories. Consult the User Guide for configuring the parameter.The stop category must be determined by a risk evaluation of the machine. In addition, suitable means mustbe provided to guarantee a reliable shut-down.Category 0 and Category 1 stops must be operable independently of the operating mode, whereby a Category0 stop must have priority. Stop functions must be implemented by disconnection of the appropriate circuitryand have priority over assigned start functions.If necessary, provision must be made for the connection of protective devices and lock-outs. If applicable, thestop function must signal its status to the control logic. A reset of the stop function must not create a hazardoussituation.Kollmorgen | December 2009 49