FAQ & Solutions

       No.

Phenomenon

Reason analysis

Solution

Display

Black Screen

Black screen once powered on

Power problems

1、Check the power supply connection; 2、Check the power type; change the type if it is not independent 24VDC（±20%）.

There is something wrong with the configuration project, such as wrong application of macro, including applying null pointer, wild pointer, off-normal array, and divisor of 0.

Dial the Dial switch 2 to ON and re-download configuration project to test simply; if macro runs improperly, debug it and apply correct macro programming methods.

Main engine trouble: Flat cable corrosion of LCD, crystal oscillator problem, etc.

Contact to the after-sale service for depot repair.

Sudden black screen during normal operation; or sometimes black screen, crash

Power problem

Check whether the power wire and the power are fine.

Main engine trouble

Contact to the after-sale service for depot repair.

Lines on the screen, vertical or horizontal line

LCD failure

Contact to the after-sale service for depot repair if each screen has the line phenomenon.

Touch

Slow touch response and difficulty to touch controls

Installation problem

1. Check whether the open whole is so small that it squeezes HMI and if so install it according to right hole size; 2. Check whether setscrews are too tight and ensure the stress of four corners as consistent as possible.

Improper configuration project

Too much configuration project message, background macros and over range screen variables and controls; modify the configuration program, add or reduce controls and screens reasonably.

Touch failure

Coordinate adjustment or touch panel damage

1. Dial the dial switch on 1 to execute coordinate adjustment;

2. Contact to the after-sale service for depot repair if the former doesn’t work.

Jump wire（In Keyboard, press A but display X or others）

Touch panel failure

Contact to the after-sale service for depot repair.

Communication failure

Communication outage between HMI and controller

Communication is unavailable all the time

Failure of communication devices  （PLC, SCM, etc.）

Ensure fine sate of communication port and rematch communication parameters.

Communication port failure of HMI

Contact to the after-sale service for depot repair.

Disconnection of communication cable

Employ specific cable of Samkoon as far as possible.

Communication interrupt after a period time of normal operation

Communication wire connection appears corrosion and oxidation due to long-time operation.

Change communication wire or re-weld it.

Environment interference

Shied interference source reasonably; employ shielded wire; proper ground connection

Main engine trouble of HMI（due to strong magnet and current or lightning at scene）

Contact to the after-sale service for depot repair.

HMI cannot connect PC and downloading is unavailable.

Wrong installation of PC USB driver

Select corresponding system driver and reinstall USB driver.

Size and model of HMI are inconsistent with the actual ones.

Modify and match the right model of HMI in configuration software.

Damage of HMI downloading port

Contact to the after-sale service for depot repair. (check method: Connect another HMI with the same USB cable and PC to see whether downloading is available; if so, fault point locates on the USB communication port of HMI）

Application

Unavailable configuration

Illegal control or macro in configuration

Modify the configuration

Unsuccessful macro compilation

Installation directory of SK in environmental variables

Bring forward the installation directory of SKTOOL in environmental variables.

Off-line and On-line simulation cannot function in the meantime.

Run without administrator rights

Run SKTOOL as administrator

Downloading the wrong software causes the HMI to crash, and at the same time cannot continue to communicate and download other configurations.

Faulty logic causes the communication port to be occupied and cannot communicate normally.

Prepare a USB flash drive, write a file named "SKSys.bin", unplug all connected communication cables. Plug in the USB flash drive and re-power on the system, then the configuration will be cleared and factory settings will be restored.After that, the download operation can be carried out normally.