Q2: The PC cannot communicate with the terminal. Why?

Q3: The system fail to communicate by using USB.

Q4: How many pictures can DWIN HMI terminal store?

Q5: What is the download speed of DWIN HMI products? How to communicate with PC?

Q6: My terminal cannot communicate with my RS232 device though the connection is right and the oscillate graph can display the wave form.

Q7: The touch screen is not accurate or unable to operate.

Q8: Blank screen or no display on the terminal.

Q9: Abnormal display of the terminal module.

Q10: The Terminal Assistant software of DWIN terminal cannot be used.

Q11: High-speed download function of DWIN Terminal Assistant fails always

Q12: Failed to download by HDL661 high-speed download device

Q13: Unable to display the text correctly, display unrecognizable or no text displayed.

Q14: How to display in horizontal direction rather than vertical direction?

Q15: Overlapping on the displayed text.

Q16: Why does DWIN Terminal Assistant cannot work?

Case 1: The level of terminal and MCU do not match with each other.

Solution: the MCU level is TTL, so it needs to be converted to a level of 232; or the level of the terminal could be converted to TTL. On the back of the terminal where near the 8 Pin connecter, there are signs of ON/TTL and OFF/232. When short-circuit, it will be the level of TTL.

Case 2: The baud rate of the terminal and that of the MCU are not in accordance.

Solution: to set the baud rate of the terminal and that of the MCU the same figure, the factory default baud rate of the terminal is 115200bps. Please reference Q1.

Case 3: The pins of the terminal and that of the MCU are mismatched.

Solution: There are always mismatching between input and output, the output DOUT of the terminal should be connected to the input (normally RX) of the control equipment; the input DIN of the terminal should be connected to the output (normally TX) of the control equipment

Case 4: The fail connection way between MCU and HMI module.

Due  to  the  forward  direction  of  RS232  TXD/RXD  between  MCU  and  HMI/PC,  it  is  necessary  for  MCU-HMI connection to cross connect the 2 and 3 Pin.

Case  5:  115200bps  is  resulted  from  25MHz  crystal  oscillator  by  users’   MCU  operation  that  lead  to communication failure.

Possible Case 6: Test whether 202 output-pin have signals or not, if possible

Q2: The PC cannot communicate with the terminal. Why?

There are 4 possibilities for this condition:

Case 1: The baud rate of the computer software does not match the one of the terminal.

Solution: The default baud rate of the terminal is 115200, the baud rate of the computer should also be set to

115200, or, the communication fails. If a customer changes the baud rate of the terminal and does not know the figure he changes to, he could search it by using the ‘serial port adjust assistant”(SSCOM32 are recommended). Here below is the specific operating method.

1.       Tick the ‘HEX send’ option;

2.       Input handshake order AA 00 CC 33 C3 3C to the ‘character input frame’;

3.       Set the timed sending at 100ms/ per time, tick the ‘timed sending’; Now, the software should be sending the order through the serial port continually.

4.       Choose  the  baud  rate;  use  the  mouse  to  choose  a  random  baud  rate  and  roll  the  pulley.  If  the communication is successful, there should be a return value on the main window, and then the baud rate on the window would be the present baud rate of the terminal.

Case 2: The serial port of the PC is being occupied.

Solution: Shutting down all the other programs and software running on the PC which are occupying the serial port.

Case 3: The cable between the terminal and the serial port of the PC is disconnected.

Solution: Check if the cable is well connected, especially on the connecting point between the flat wire and the

serial port DB9. If it’s disconnected, you need to reconnect them by jointing or by changing to another cable.

Case 4: Short circuit of the jumper wire which is used for setting the baud rate.

Solution: After the short circuit operation, the baud rate should be 921600, disconnect the short circuit and the baud rate should be the one set by the customer, which is the factory default value 115200bps.

Case 1: There is no USB driver in the PC.

Solution: To set up a CP210X driver or xr21v141x_driverr by downloading from internet or by obtaining from a CD.

Case 2: The chosen communicating port is incorrect.

Solution: After setting up the driver, the PC will automatically create a new port, please search for it under the

‘device manager’ folder which is under ‘my computer’ folder. You should be able to communicate through this port.

Case 3: The chosen baud rate is incorrect.

Solution: There is a bridle wire on the back of the terminal which is for setting the baud rate, you will need to short-circuit it and use the baud rate of 921600bps.

Q4: How many pictures can DWIN HMI terminal store?

With different LCD resolutions and modules, M100, M600 and K600 have a 96MB memory (upgrade to 1GB

maximum optional) of which 32MB memory space for fonts and 32MB memory space for user data. H600 has a

282MB memory (upgrade to 3GB maximum).

The charts below show the amount of pictures that can be saved in different resolutions with different kernels. Modules with M100, M600, K600 kernels

Module with H600 kernel

Q5: What is the download speed of DWIN HMI products? How to communicate with PC?

On the backside of the terminal there are two pads with ON=921600 OFF=USER SET on it. The baud rate will be set  to  9216000 if you short out the two pads. Please take out the jumper cap if you want your terminal to communicate in other baud rate.

Q6: My terminal cannot communicate with my RS232 device though the connection is right and the oscillate graph can display the wave form.

Overturn the terminal and see if the two pads with ON=3.3VTTL/CMOS OFF=RS232 on them connect together. Cut the connection between them to achieve RS232 communication.

Q7: The touch screen is not accurate or unable to operate on

Case 1: Infrequent adjustment lead to the low accuracy.

Solution: To use the ‘adjust the touch screen’ function under the ‘peripheral’ option of the Terminal Assistant

software. After the adjustment, you could test the touch screen.

Case 2: The poor contact between the connecting line of the touch screen and the PCB board.

Solution: To check whether the connection between the connecting wire of the touch screen and the pin on the

back is loosen; if it’s loosen, adjust it and make it perfectly connected.

Case 3: The touch screen has not been set to the switch mode.

Solution: When finished the process of setting the touch screen interface, you need to use 0xEO order or by clicking the ‘system parameter setting’ icon under the ‘developing and demonstrative assistant’ option of Dwin’s terminal, and to set the touch screen to the corresponding switch mode. For further explanation please refer to ‘instruction set’ 0xEO.

Q8: Blank screen or no display on the terminal.

Case 1: The voltage input is too low.

Solution: Refer to the product data manual and choose the typical voltage input;

Case 2: The background light is turned off because the receiving of a background light turned-off order.

Solution: To check if you have sent an order to turn off the background light. If you have done that, you just need to restart the terminal again and it will be recovered. The setting of the background light volume would not be saved automatically.

Q9: Abnormal display of the terminal module.

Case 1: the configuration parameter error of the terminal’s display caused by the incorrect operation.

Solution: This problem will only occur when using the program version under V5.3. Since for program V5.3 and programs above it, the customer cannot change the configuration parameter of the display. When this happened, you have to refer to part of the TFT_ID parameter diagram in the ‘working mode configuration’ of the ‘instruction set’ and to find the corresponding TFT_ID, then to change it by using EO order of the ‘system parameter setting’ icon under the ‘developing and demonstrative assistant’ option.

Case 2: Poor contact between the linking module set and the white cable of the wire board.

Solution: check the cable and make sure it’s well connected.

Case 3: Dazzling monitor occurs when issuing the picture.

Solution:   Choose   the   right   resolution   (in   the   drop   down   list   of   control   panel   on   the   left   side   of TerminalAssistant.exe).

Q10: The Terminal Assistant software of DWIN terminal cannot be used.

Case 1: There’s an alert showed initialization failed when staring up the application.

Solution: When you download the program from our website, please make sure that you download and set up the

Framework2.0 software as well (or other program which is compatible).

If not, please visit our website: www.dwin.com.cn, clicking ‘Download’-‘Software’-‘Framework 2.0’

In addition, please notice that exe. files and config files shoud be decompressed in a same folder.

Case 2: There is no option buttons when opening the drop down list of resolution settings on the left side. Solution: when you move an application, make sure you move the files of config at the same time; that is putting both files in the same folder. The reason is that all configuration files in the program are under the folder of config.

Q11: High-speed download function of DWIN Terminal Assistant fails always.

DWIN high-speed download function” is a special function to increase the speed of picture downloading. The function must be supported by software and hardware. Because normal PC cannot achieve 115200 and higher baud rate, users cannot use the function if they connect PC and DWIN terminal together directly. There are two ways to use the function. The first one is to use DWIN high-speed download device (with xr21v141x chip in it). The second one is to use DWIN HMI terminal with high-speed download port (onboard USB port and xr21v141x chip). At the mean time, users must install xr21v141x driver to stimulate serial port to achieve high-speed download. And the speed of  high-speed download is 6.25MBPS with the support of hardware. 921600 of CP2102 doesn’t need to select this item.

Q12: Failed to download by HDL661 high-speed download device.

Please operate step by step according to the instructions. There must be one terminal connected to the interface marked MUST PLACE on the top left corner, otherwise there will be no backtrack-command frame.

Attachment: Usage method of HDL661 high-speed download device.

1.         Set the terminal baud rate: Set the wire jumper to 621600bps. (Prompt on the terminal PCB: ON=921600, OFF=User Set, default set is off). Short out the bridle wire to set the baud rate at 921600.

2.         Directly use bi-8PIN cable to connect the DWIN terminal and HDL661 download board.

3.         Connect the PC and the download board USB interface with USB cable.

4.         Connect HDL661 to power supply.

5.         With DWIN terminal assistant, users can download pictures in 921600bps without hand-shaking.

Case 1: When using the 98 order, the definition is incorrect.

Solution: Refer to the specific definition of 98 orders in the ‘instruction set’, or consult with technical support.

Case 2: When testing with the software, the display is unrecognizable.

Solution: The coding pattern of the transferred word stock should be in accordance with and lattice size of it.

Q14: How to display in horizontal direction rather than vertical direction?

Case 1: Rotate the picture for 90 degrees in either way.

Solution: Download the picture after spinning 90 degrees in either way.

Case 2: To rotate the text for 90 degrees.

Solution: For the terminals using module program V5.3, you will only need to set the program by using working mode configuration order (E0); For the terminals using module program lower than V5.3, you will need to update certain programs.

Case 1: When you use the command of 98 to display the text, the background color will cover the original text when you turned it on; but if you turned off the background color to realize the transparent display, there would be overlapping occurs.

Solution: Using the textbox with solid-color background; in this way, you will not only achieve the effect of display with the same theme, but also avoid the possibility of overlapping.

Q16: Why does AMP Terminal Assistant not work?

Windows Framework 2.0 is essential to run DWIN Terminal Assistant. It’s normally intrinsic in Windows XP. Users can also download it at http://www.ampdisplay.com/download.html Please unzip the exe documents and config  documents into the same folder. Pay more attention to DWIN website: www.ampdisplay.com to get the latest version of this software.

DWIN HMI products run the kernel-system that developed by DWIN independently. Different with other common operating system (Windows XP, Windows 2000 etc.) and embedded system (uSOS-II, Windows CE etc.), DWIN kernel-system has its own DWIN HMI command set that can hardly be infected by various system viruses. Users don’t  have  to  worry  about its  stability  and  security  performance. The  contents  (touch-screen  and  interface documents  etc.) saved in DWIN HMI are read-only and cannot be transferred to another memory. This can guarantee its security performance with no possibility that the product could be cribbed.