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Absolute encoders provide information about position, angle, and rotation counts in type-specific angle steps. For this, a unique code pattern is assigned to each angle increment. The number of code patterns available per revolution determines the resolution. Each code pattern forms a unique reference, and is therefore an absolute position. There is therefore no need for a reference run after switching on. A singleturn encoder measures the absolute position within one revolution. A multiturn encoder not only provides the position within a single revolution but also the number of revolutions.