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We got a V280 controller, had to change the code inside. I made a RJ11 RS232 cable according to a manual. Successfully connected and uploaded the code. Changed the code (just a linear regression values). Then downloaded the modified code to the controller. Modified program is worked supposedly. After that, I am no longer able to connect to controller again. Although nothing has changed, I checked all the configurations. Cable pins, RS232 settings, USB converter. Everything is same.

 

I've entered Info Mode by pressing down "i" button for 4 seconds. Got password screen. Entered 1111, but it doesn't work. I have seen there was a code 7455 somewhere in PLC code. Entered, it worked. But there is no anything related to "Erase". There are variables screen, system settings (serial port configuration, firmware, plc state...)

 

While controller is in info mode, I display serial port configuration screen. Let's say 57600 baud rate is selected. I select different baud in VisiLogic PC software and hit to connection button. I see baud rate on Vision controller changes to what I selected on PC. Whatever I do, I still get the error below (screen shot is also added);

Communication	23/08/2013 14:49:15	Close port 
Communication	23/08/2013 14:49:13	"Open port 1 57600,N,8,1"
Communication	23/08/2013 14:49:13	Unable to Synchronize  - PLC Communication Parameters cannot be set
Communication	23/08/2013 14:49:11	"Open port 1 9600,N,8,1"
Communication	23/08/2013 14:49:10	Send break signal 
Communication	23/08/2013 14:49:10	"Open port 1 57600,N,8,1"
Communication	23/08/2013 14:49:09	Close port 
Communication	23/08/2013 14:49:09	"Open port 1 57600,N,8,1"

I've got the original source code. If I could wipe the controller out, I can program it from the beginning. Do you know how can I reset it?

 

P.S.: tried different versions of VisiLogic, searched the old forum, read the manual... nothing solved the issue yet.

post-17878-0-73207800-1377495185_thumb.jpg

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Hi,

What are PLC system files versions (from Info mode)?

What VisiLogic version did you used?

 

Power-off PLC, keep I button pressed and power-on. PLC will start in OS Stop mode. Check communication.

 

Enter Info mode, enter System, scroll to select Erase. This will erase mostly all.

After erasing, PLC stay in Bootstrap mode.

You have to use COM 1 of PLC to communicate and download OS, and then application.

 

I hope this helps.

BR.

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Hi,

What are PLC system files versions (from Info mode)?

What VisiLogic version did you used?

 

Power-off PLC, keep I button pressed and power-on. PLC will start in OS Stop mode. Check communication.

 

Enter Info mode, enter System, scroll to select Erase. This will erase mostly all.

After erasing, PLC stay in Bootstrap mode.

You have to use COM 1 of PLC to communicate and download OS, and then application.

 

I hope this helps.

BR.

 

Thanks for quick suggestion. Still have no luck. The steps I took;

  • 1-InfoMode.jpg

    I pressed the "i" button while powering on the unit. System started in "O/S Mode"

  • Unit files are version 4.7 (as seen in the screen above)

    VisiLogic on my computer is also 4.7.0 build 0

  • I tried communication settings in this menu, nothing worked.
  • Pressed "i" button for 4 seconds, got into "info mode".
  • Used password "1111".
  • 2-system-0.jpg

    Scrolled to system menu.

  • Cycled in system menu but nothing related to "Erase" found.

    2-system-1.jpg, 2-system-2.jpg, 2-system-3.jpg

  • System was in stopped mod as you described

    3-system-stopped.jpg

 

Is there anything wrong in this setup?

post-17878-0-63457700-1377501706_thumb.jpg

post-17878-0-94650400-1377501711_thumb.jpg

post-17878-0-00298200-1377501717_thumb.jpg

post-17878-0-18059900-1377501722_thumb.jpg

post-17878-0-62777500-1377501771_thumb.jpg

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Forgot to tell you that I used "Port 1" RS232 on controller, "Com 1" on my PC. Tried to "OPC information" in O/S Mode. Tested baud rate are 57600 and 115200. Still got error. The error screen is here.

 

gqda.jpg

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This embedded image cannot be opened.

imageshack site is blocked in our company.

 

Did you tested COM port 2?

 

Do it sequentially 3-5 times. Change Timeout and Retries.

 

If you continue to face this problem - send support request to support@unitronics.com

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This embedded image cannot be opened.

imageshack site is blocked in our company.

 

Did you tested COM port 2?

 

Do it sequentially 3-5 times. Change Timeout and Retries.

 

If you continue to face this problem - send support request to support@unitronics.com

 

I tried every combination several times. Com2, baud rates, different USB ports, different PC com port numbers, retry counts...

 

I'll send support ticket now. Thanks anyway.

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I have the same problem.

Uploaded the original program, modified and downloaded it fine for once. After that, download, upload, verify and anything related to Flash memory fail to work no matter what combination of setting change. However, all on-line test functions work though.

Anyone has any idea how to get out of it?

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