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Posts posted by kratmel

  1. Please post your modbus setup. Motor and drive nameplate and how modbus wires is connected to V700.  Sometimes A & B RS485 wire is swaped.

    If you use USB connection to V700 - com port 1 is not work with modbus - it is connected to USB and Visilogic.

    If it possible please use PC Modbus software and USB to R485 connection for test drive communication.

    Please note - In drive parameter - you must configure communication settings drive ID  and enable Modbus communication.

  2. Please print and post to topic foto of  test page on this printer but not windows test page - you must print via printer button combination.

    On this test page you can see communication settings and default communication cnannel. 

    You can also test printer RS232 COM port via vindows (you must use USB to RS232 cnverter with driver for test).

    I found several zebra termal printer with RS232 but some of them has defect com port (printer do not print via Com port in windows).

    This maybe useful


  3. You post message in Projects seeking Programmers...

    Than you must have some system setup based on Unitronics PLC (Jazz, Vision or Unistream).

    If you post present hardware and PLC setup - someone can offer help with program.


    If you do not have any PLC  - please post  present machine configuration in this topic and moderators place your quastions to 

    ...I have a project...what hardware do I need?


  4. Please post - what message is recieved via PC from instrument (terminal printscreen).

    Please post instrument model or link to user manual with communication option.


    In protocol  FB you post  used 22 byte scan string(0to21)+2byte start+ 1byte end=25byte message scan  - it is not parsed by FB protocol.

    As Ausman recommend please try to scan string with 24 bytes length without ETX and STX.


  5. Please post your RS232 communication configuration.

    If you use FB Protocol than you must (tips from manual):

    ---- A Protocol Scan FB, which enables the controller to receive data response messages from the device. Note that in order to receive new messages, you must clear the communication buffer after each message by using the Reset Buffer FB.

    Maybe no resetted buffer cleared via com port timeout is main problem.

    You can also use port 1 for testing (Ethernet connection to Visilogic must be used).

  6. Checklist:

    - swap welder power supply;

    - use two separate control V570 system (you can make the same distance condition to the WS);

    - check - is it possible that separate welding only WS1 or only WS2 work without lost communication.  I have issue on two TIG welders working simultaneously on the one big machine part    - one of welder - sometimes lost settings parameter.   

    - all system powered from the same power line, Than you can temporary power V570 from the isolated UPS or battery. Than RF spike can't go to the V570 power line.

    - I do not know how to test it.... - is it possible that motion conroller lost communication and it is  not V570 problem?

    - is it some addon wire used near or in weldind gun ( home sensor, collision detector, arc voltage supervision, ect) - what circuit used for filtering or isolating  for this cirquit?

    TIG torch uses a burst of RF to establish the arc - generate above 8000V - then standard isolation -like stadard transformer or optical isolator is not enough.


  7. Sorry i can't find foto of board inside TIG box. Maybe i can make new one on next week.

    This manual maybe useful. Also please see correct grounding on p.21-22



    If it possible please post your TIG connection setup. I have some diagram from different TIG welders maybe we can find solution.



    I have some trouble with Ethernet connection to the V700 panel installed near properly grounded VFD in metal control box. If VFD start - connection is lost.

    Issue is solved by connection -24V (GND) of V700 Power supply to the control box common ground point. Ethernet run stable after this.

    Many machines provide this connection (-24VDC to ground) by default.     

  8. Based on what you said - the cause of all the problems was the replacement of standard welding on TIG with high-frequency ignition.

    In my experience, the main problem with this improvement is the lack of complete filtering of the interference signal from the TIG torch to the rest of the system equipment. I have repeatedly encountered various methods of combating radio frequency interference, which did not work because insufficient or no filtering on one of the wires of the system - turned this wire into an antenna, creating radio frequency chaos.

    The main idea you need to implement is described in the figure.


    None of the wires installed in the welding system should pass without measures that implement filtration and high-voltage galvanic isolation.


    The figure describes the equipment mounted on the Panasonic robot to switch its operation to TIG mode. You can see how the control signals to the manipulator are implemented. No other measures to protect against interference from the robot itself and network cables to the computer that sends it the task is not applied.

    In short, you are trying to eliminate the effects of interference - instead of reducing and limiting them in the welding circuit.

    You must find ready to use standard TIG filtering system used in automatic TIG welding. Or use it diagram for build self made filering station for all TIG tourch.

    Than you can return to first not optical variant of your system without any problem.



  9. Hi, is it possible that 20SMS is limited by mobile operator for this SIM card? Like spam filter - generally user do not get a lot of message from  one number.

    Or sometimes only 20 (or more)  SMS is possible to send free of charge.... (in some operator this number of free SMS is possible for 24hour).

    I that case (no money) my operator allow to push new message only after send payment to account  and modem restart.





  10. 5 hours ago, Shahid said:

    Do I need to convert stored value to ASCII first then link in Scan FB Protocol?

    Scan FB Protocol used for "read-in" not standard messages. Main problem is to find correct message format. 

    If i can not find correct check sum method - i try to read-in message without it.  It works....  Sended by another device message do not need to be scanned

    directly as it appear in manual. Only start of message must be correct (for separate message) and message length must not be longer then scanned variable - message can be written to buffer and it can be parsed by byte operation.

    But in this method some Silent period must be prepeared. (without  it FB Protocol sometimes react on checksum as message start).

    Check sum needed only if you must 100% correct  data scan.  For testing it is not needed.

    • Like 1
  11. 15 hours ago, Shahid said:

    some suggestions/ inputs before testing

    You can use info mode for test what PLC send to sensor and what sensor send to PLC.

    It is possible to find com port settings and see RX and TX buffer.

    Please try to load program and check this useful option.

    I use it for configure communication with not standard protocol device.

    If tx buffer is the same as on PC than RX from device must be the same

    • Like 1
  12. 1 hour ago, Joe Tauser said:

    I often wonder how many people get their hardware on eBay and then come here for tech support....

    I would like to add a few remarks to this ...

    Positive consequences:

    - in most cases, despite the respectable age of obsolete models of PLC Unitronics purchased on ebay  they are in working condition (+++++ to Unitronics brand);

    - also in most cases it is possible to significantly upgrade the controller - sometimes even to a fairly modern version of the software;

    - the ability to purchase a screen or keyboard of the controller as part of the used cheap PLC,  sometimes it is necessary to repair older production machines;

    - the price that allows you to buy a controller or expansion module for experiments or training when its sale is not expected.


    Negative consequences:

    - modern documentation does not correspond to outdated models despite the same name (this case);

    - there are incompatibilities of hardware and software versions (recently we studied on the forum why the new network card does not see by the outdated PLC);

    - the absence of any guarantees that everything in the PLC is in working order, so it is clear that to build new machines on such old  PLCs is not recommended.

  13. 10 hours ago, Patrick said:

    secret to call the keypad

    I do not know this secret... But i make some screen with + - buttons for change numbers. (increment decrement rate changed if button pressed for long time).

    If it must be fast for operator - then + -button used for all for 5 numbers separately.  Enter and Esc also present.  

    +++++    ESC

    00000    Enter

    - -  - -  -  

    Operator like this screen :) big numbers and buttons.

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