Touch Calibration: Mcgs Hmi

If the system has a password set for the system configuration or if the "Blank Hold" method fails, use the .

For technicians integrating new MCGS screens with PLCs, remember that calibration lives on the HMI hardware, not the .mcgspro project file.

Are you using or the Kunlun Tongtai software version?

: Once you have tapped the screen, wait approximately 30 seconds . The system will automatically enter the touch screen calibration utility. 2. Executing the Calibration

Use a blunt, non-abrasive tool (like a standard stylus or your finger) to precisely press the center of the crosshairs or dots as they appear. They will usually appear in all four corners and the center of the screen. mcgs hmi touch calibration

The goal of calibration is to find a transformation matrix that converts Physical Coordinates $(X_p, Y_p)$ into Logical Coordinates $(X_l, Y_l)$.

: Tap the screen one last time anywhere to save the data and exit to the main operation interface. Alternative Calibration Methods

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Apply power while holding your finger down on any part of the screen. If the system has a password set for

| Symptom | Likely Cause | Fix | |---------|--------------|-----| | Drift returns after power cycle | Dead backup battery (on older units) | Replace CR2032 battery on mainboard | | Crosshairs jump during calibration | Dirty screen or debris under bezel | Clean edges with compressed air | | One axis works, other is inverted | Corrupted touch driver | Re-flash MCGS firmware via USB |

However, even the most robust resistive touch screens can experience inaccuracies over time due to environmental factors, heavy use, or physical changes. is the essential process of aligning the screen’s physical touch point with the logical input detected by the system.

Once inside the TPC System Settings interface, look for the tab labeled "Touch" . Uncheck the "Show Mouse Pointer" option if it interferes, and click the button that says "Touch Screen Calibration" . (Note: If the system is password-protected, you will need the system engineer's credentials to proceed).

If your touchscreen continues to have issues after calibration, you may want to check if the panel itself needs a or if there is a hardware defect , such as a faulty overlay, that requires professional repair. : Once you have tapped the screen, wait

To ensure your MCGS HMI functions perfectly after calibration:

Large VFDs (Variable Frequency Drives) or welding equipment near the panel can induce noise on the resistive touch film.

Where $A, B, C, D, E, F$ are calibration coefficients calculated during the calibration process. Because there are six unknowns, a minimum of three calibration points (non-collinear) is required to solve the system of equations. MCGS typically uses a method to average out errors and improve accuracy.

Most older or budget-friendly MCGS models use (pressure-sensitive). Unlike your phone’s capacitive screen, these rely on precise voltage alignment between the LCD and the touch film.