Calculating proportional band from PI gain on a Xenta 121

Issue

Calculate proportional band from Control > PI > gain values

Product Line

TAC Vista

Environment

  • Xenta 121
  • ZBuilder

Cause

The gain value in ZBuilder is a unitless value representing the inverse of the proportional band in °C. The maximum value for gain is 32.7675.

Resolution

100/gain = proportional band °C

If the gain is set to 25, then the proportional band is 4°C (7.2°F, diff).

Because the maximum gain value is 32.7675, the smallest possible proportional band is 3.05°C (5.49°F, diff).