SYSTEM AND METHOD FOR OPERATING A SYSTEM (amended

Abstract

In a and method for operating a system, including a drive that is connectable to a supply-voltage source, especially an AC-voltage source, with the aid of an apparatus, in particular a control unit, via electric lines installed in the system, information is transmittable between the control unit and the drive, using the lines.

1 - 27 . (canceled) 
     
     
         28 . A system, comprising:
 a device connectable to an AC supply-voltage source by an apparatus, including a control unit, via electric lines installed in the system, wherein the lines are adapted to transmit information between the control unit and the device.   
     
     
         29 . The system according to  claim 28 , wherein the device is arranged as at least one of (a) a drive, (b) a counting device, (c) a gas meter, (d) an electricity meter, and (e) a household electrical device. 
     
     
         30 . The system according to  claim 29 , wherein the drive includes a measurement device adapted to measure supply voltages assigned to the lines. 
     
     
         31 . The system according to  claim 29 , wherein three lines are provided, the drive including a measurement device adapted to measure a voltage between each line and a reference potential. 
     
     
         32 . The system according to  claim 28 , wherein the apparatus includes at least one of (a) a half-wave control and (b) a half-wave control for at least one of three lines. 
     
     
         33 . The system according to  claim 28 , further comprising a difference device adapted to form a difference between two measured voltages. 
     
     
         34 . The system according to  claim 28 , further comprising at least one of (a) a curve-evaluation device and (b) an averaging device. 
     
     
         35 . The system according to  claim 34 , wherein the curve-evaluation device includes at least one of (a) an amplification device and (b) a multiplication device for multiplication by a factor, the factor selected such that amplified values are uniquely assigned to the information to be transmitted, one of (a) after averaging the amplified values and (b) after curve evaluation, at least a determination of a sign reversal being provided in the curve evaluation. 
     
     
         36 . The system according to  claim 28 , further comprising a comparator adapted for comparison with threshold values, the information including a result of the comparison. 
     
     
         37 . The system according to  claim 28 , wherein the line includes a three-phase cable. 
     
     
         38 . The system according to  claim 29 , wherein, during a time interval in which information is transmitted, the drive is fully powerable by only two of three phases. 
     
     
         39 . The system according to  claim 28 , wherein the information is transmittable on a third phase, which is shiftable by the apparatus to different states one after another in time to code the information. 
     
     
         40 . The system according to  claim 39 , wherein a first state is a blocking of negative current components, and a second state is a blocking of positive current components. 
     
     
         41 . The system according to  claim 40 , wherein a third state is not to connect a third phase, thus, to block a current, and a fourth state is to completely pass the current through. 
     
     
         42 . The system according to  claim 29 , wherein the drive includes signal electronics adapted to receive and decode the information. 
     
     
         43 . The system according to  claim 29 , wherein the drive includes an electronic circuit adapted to reverse a sense of rotation of a three-phase supply. 
     
     
         44 . The system according to  claim 29 , wherein the drive has an electronic circuit adapted to influence a rotary motion of a rotor of an electric motor, including at least one of (a) a motor switch, (b) a soft start, and (c) a converter. 
     
     
         45 . The system according to  claim 29 , wherein during a time interval in which information is transmitted, two of three phases for powering the drive change, and a third phase changes such that the two other phases are always provided to power signal electronics of the drive, and the third phase is provided for transmitting the information. 
     
     
         46 . The system according to  claim 28 , wherein the apparatus has a series connection of power switches assigned to a third phase for at least one of (a) blocking and (b) letting at least one of (a) positive and (b) negative current through. 
     
     
         47 . The system according to  claim 46 , wherein the power switches are drivable by a control. 
     
     
         48 . The system according to  claim 29 , wherein the drive includes a rectifier, fed from the lines, having at least one of (a) unipolar and (b) rectified output voltage having a negative and positive potential. 
     
     
         49 . The system according to claim  4 , wherein the negative potential is arranged as a reference potential. 
     
     
         50 . The system according to  claim 28 , wherein at least one of (a) signal electronics of the drive are provided at a negative potential and (b) a voltage between electrical contacts of components of the signal electronics and the negative potential is always lower in terms of absolute value than the voltage to a positive potential. 
     
     
         51 . A method for operating a system having a drive that is connectable to an AC supply-voltage source by an apparatus, including a control unit, via electric lines installed in the system, comprising:
 transmitting information between the control unit and the drive via the lines;   measuring assigned supply voltages to the lines;   forming a difference between at least two of the measured voltages; and   implementing a curve evaluation.   
     
     
         52 . The method according to  claim 51 , wherein at least at a beginning, one of the lines is recognized on which the information is transmitted by comparing average values of voltages. 
     
     
         53 . The method according to  claim 51 , wherein averaging is performed as the curve evaluation. 
     
     
         54 . The method according to  claim 51 , further comprising performing a comparison with threshold values, wherein the information includes a result of the comparison.