What the 50 ms sampling means for your loop
The Fuji Electric PXF4APS2-FV1A1 is a self-tuning 1/16 DIN (48 x 48 mm) compact temperature and process controller with a 50 ms sampling speed. That sampling rate — one reading every 50 milliseconds — means the controller catches fast thermal transients in processes like injection molding barrel zones or thin-film extrusion where a slower 250 ms or 500 ms loop would let temperature overshoot settle into the product. The self-tuning algorithm adjusts PID coefficients on startup, so the first good part comes sooner than manual tuning would allow.