How to solve the rotary encoder, grating and PLC controller conversion between the interface ！

In the application of PLC high-speed encoder counters are often encountered, the counter and the input pulse count pulse signal does not match the level of the rotary encoder, grating data output is TTL level, and PLC high-speed counter is required to accept 0-24v transmission A +, A-, B +, B-, Z +, Z-symmetrical counter-phase counting pulses or to provide A +, A-, B +, B-, Z +, and Z, in order to improve the reliability of the encoders. - Symmetrical reverse sinusoidal vector signal, but the PLC high-speed counter receives a single-phase pulse pulse count. The user does not select the appropriate interface and give up one of the phase (to improve the system's ability to provide anti-jamming pulse count).
Another example is the use of rotary encoders, grating ruler of the occasion of non-unidirectional uniform motion, the movement speed is fast when slow, static when moving, when the timing of the uncertainty, or in very low speed of the occasion, If the interface does not match the deal is very prone to counting error, and pulse data transmission distance slightly longer, pulse transmission process will produce a sudden change in pulse waveform.
There are many applications, although the count pulse frequency is not high, while ignoring the PLC high-speed pulse counter on the edge of the pulse count pulse rate is required (the formation of the rising pulse, falling edge response speed to be steep), especially in the application of line number comparison High encoder in the low-speed operation, due to mechanical movement is bound to produce a slight struggle or encoders before the class has a variable speed gear, it is easy to cause coding pulse front and rear mouth sawtooth mouth. There are long-term mechanical movement wear, so that the gap will lead to a larger pulse before and after the mouth appears on the serrated mouth.

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