Micro-increments

• Works with and without distributed clocks, but in the EL515x this is only meaningful in conjunction with one of the DC modes
• By setting the counter value only the integer component can be modified.
• The principle:

Fig.150: Principle of frequency measurement

The highly constant query cycles (accuracy: 100 ns) of the distributed clocks system permit the EL515x to interpolate interpolated axis positions between the counted encoder increments above a certain speed. The interpolation resolution is 8 bit, corresponding to 256 values. A standard encoder with 1,024 bars with 4-way evaluation and micro-increments thus becomes a high-resolution axis encoder with 4096 * 256 = 1,048,567 bars.
If the speed falls below the minimum speed, this is displayed by the object “Extrapolation stall” (index 0x60n0:08) in the process data.