Some time you may need to recalibrate the HMI touch screen of your SAMBA or Vision PLC.
Try to perform a calibration according to the below instructions:
1- Verify that the PLC is standalone (No I/O) on your desk and without any protective cover on the touchscreen.
2- Check that the PLC is clean and also when it's OFF try to search any object (Dirt, Dust ) between the behind the touchscreen.
3- Power ON, Touch the display and check the values SI40,SI41 - When the touch screen is not pressed, SI40 and SI41 equals to -1:
If the values are not equals to -1, please clean the screen and remove the screen protector (if there is any).
4- SB74 takes care to save calibration points to the EPROM.
Please Try to calibrate the touchscreen using a stylus pen as follows:
· When the PLC is connected, go to on-line mode (F9)
· Go to SB74 and press on "set", SB74 will rise to 1
· Now, go to SB73 and press on "set", calibration cursor will appear in the PLC's display.
Please calibrate the HMI touch screen.