Method and device for transmitting signals from a position measuring arrangement to an evaluation unit

A device for transmitting substantially rectangular-shaped position signals and reference pulses, as well as warning signals indicating a malfunction state, from a position measuring arrangement to an evaluation unit, the device comprising:

• a position measuring arrangement that determines a position of two elements of a machine which are movable relative to each other, said position measuring arrangement comprising:
• a scale graduation comprising an incremental graduation and reference markers, wherein scanning signals are generated from said incremental graduation;
• a logic unit which outputs substantially rectangular-shaped phase-shifted, incremental position signals from said scanning signals and which generates a substantially rectangular-shaped reference pulse from said reference markers and said position signals in such a way that, in the malfunction-free state, valid status combinations and invalid status combinations for issuing said reference pulses occur in each period;
• an evaluation unit that receives said position signals and said reference pulse from a signal transmission of said position measuring arrangement, wherein said logic unit inserts a warning signal into said signal transmission indicating a malfunction state during a status combination of said position signals and of said reference pulse which, in a malfunction-free state, is invalid for issuing said reference pulse, wherein said evaluation unit comprises a malfunction recognition unit which filters a warning signal, which was transmitted during a status combination of said position signals and said reference pulse which is invalid for an output of said reference pulse in said malfunction-free state, out of said signal transmission.