Input values at X9 are limited

What does P19 mean?

The function block DFIN is limiting the input values at X9, which causes a loss of increments. This suggests an issue with the digital frequency connection or a mismatch in master/slave settings, affecting precise control.

• Digital frequency input (DFIN) parameters (e.g., P1-60 to P1-63) are configured to limit the input frequency or pulse count received at X9.
• The frequency signal applied to X9 exceeds the maximum permissible input frequency defined by DFIN scaling parameters.
• Mismatch between the master encoder output frequency and the slave device's DFIN input scaling, causing saturation or clipping.
• Noise or signal integrity issues on the digital frequency input lines at X9, leading to misinterpretation of high frequency pulses.
• Incorrectly set filter parameters (e.g., P1-64) for the DFIN input at X9, causing signal attenuation at higher frequencies.

Click steps to track your progress.

1. 1

   Review parameters P1-60 (DFIN scaling) and P1-61 (DFIN maximum input frequency) to ensure they match the expected input signal range.

2. 2

   Using an oscilloscope, measure the actual frequency and amplitude of the signal applied to X9 to ensure it's within expected limits.

3. 3

   Adjust the master device's output frequency or the slave device's DFIN scaling parameters (P1-60 to P1-63) to prevent exceeding limits.

4. 4

   Verify the integrity of the cabling to X9 for proper shielding and termination to minimize noise, especially for high-frequency signals.

5. 5

   Temporarily disable or adjust any active filters (e.g., P1-64) on the DFIN input to see if they are causing unintended signal limitation.

6. 6

   Check for any internal function block logic (e.g., via diagnostic software) that might be imposing additional limits on the DFIN value after scaling.