Advantech Automation1 XC4, Hardware Manual

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2.3.1.3. Sine Wave Encoder [-MX1 Option]
The Sine Wave Encoder option provides higher positioning resolution by subdividing the fundamental
output period of the encoder into smaller increments. The amount of subdivision is specified by the
PrimaryEncoderMultiplicationFactor [A3200: EncoderMultiplicationFactor] parameter. Use Encoder
Tuning [A3200: Feedback Tuning] to adjust the value of the gain, offset, and phase balance controller
parameters to get the best performance. For more information, refer to the Help file.
High resolution or high-speed encoders can require increased bandwidth for correct operation. Use the
High Speed Mode of the PrimaryEncoderMultiplierSetup [A3200: EncoderMultiplierSetup] parameter to
enable the high bandwidth mode. Because this mode increases sensitivity to system noise, use it only if
necessary.
You cannot use a sine wave encoder with the -MX1 multiplier option as an input to the PSO. The -MX1
option does not generate emulated quadrature signals.
For the highest performance, use twisted pair double-shielded cable with the inner shield connected to
signal common and the outer shield connected to frame ground. Do not join the inner and outer shields
in the cable.
Table 2-18: Sine Wave Encoder Specifications
Specification Value
Input Frequency (max) 450 kHz, 2 MHz
Input Amplitude (1)
0.6 to 1.75 Vpk-pk
Interpolation Factor (max) 16,384
Input Common Mode 1.5 to 3.5 VDC
(1) Measured as SIN(+) - SIN(-) or COS(+) - COS(-)
Figure 2-21: Sine Wave Encoder Phasing Reference Diagram
2.3.1. Primary Encoder Inputs XC4 Hardware Manual
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