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Posts posted by kratmel

  1. In my last project, I used Lenze 8400 with embedded CANopen .

    The capabilities of this driver make possible to prepare "hardware" PDO signal  "IN position", "0-position is known", "ACC", "DCC", ect...

    I did not use timers in the program, but only use system bits SB288, 284, 242, 292  to avoid network collisions .

    What motor driver used?

    Maybe it is  ready to transfer needed bits or they can be re-assigned manually inside the drive.

  2. Hi everyone

    I need to retrofit old high power UV lamp control system. Original PLC is broken.
    Old system Led optical filter is completely damaged (maybe by indirect UV).
    Now Jazz  PLC must be installed.
    Operator  change program on machine and switch on process from remote control.
    Question how to protect PLC from high power indirect UV light.
    Mount panel on remote position?
    Hide by door?
    Any ideas?



  3. Something with ABB modbus is wrong ....
    Since this is only software starters, their management requires a maximum of 9 outputs (on-off control)

    and 9 (alarm) or 18 inputs (alarm + normal operation-end of speed rump).

    You may need to drop modbus from the list and use the unitronics I/O expansion modules.

    By the way,  maybe you have wiring issue 

    I did not know how to check the ports momentarily stops.

    Maybe transmission is not hardware buffered and only software data flow control used (interrupted by screen change).

    Or screen change command is active for to long time.


  4. On 6/23/2018 at 5:52 AM, gongue2005 said:

    I forget to say that slaves have only 19200 bps.

    I try to find information about PSTX ABB   and see  parameter list with communication settings.

    12.09 - settings  for communication speed,

    Also find some note in


    : If there is no message passed between the PSTX softstarter and the Modbus RTU master for more than
    100ms, the PSTX softstarter will trip on fieldbus communication failure protection (P1E00) and with the default
    configuration, the motor will be stopped. If the fieldbus communication system is setup in such a way that
    commands/requests are not continuously passed between the PLC and softstarter, this protection function should
    be disabled. The parameter 19.4 (Fieldbus failure op) can then be set to "Off".



  5. I have to keep a zoo of computers with old operating systems:
    1) Siemens PG710 8086 CPU and MS-DOS 5.0 for simatic S5 cartridges.
    2) P233 + Windows 95 for the old ROM programmer.
    3) celeron 800 + win 98 for ABB robots,
    4) fujitsu siemens IPP + WinXP - for all old servo, VFD, PLC, Jazz and M91.
    5) core i5 + win10 - for the rest of the programs and drivers who can not swim.:)

    Everyone except No. 5 does not need or is not updated at all, but it is always in work condition and bring benefits to me.

    Microsoft update is small worm that must eat something for dinner.?

  6. On 5/21/2018 at 9:20 AM, Eugenio said:

    The second email, I tried to attach a light file (191.2KB) or more weight (394.4KB) the result is equal, I get both mails but for the second I get the error of "Time Out". Why?

    Is it COM  init block (visilogic like ) used for communication with modem?

    Maybe RS232 timeout error generate "Time Out " message.

    If RS232 timeout default settings is 0.5sec -  correct  long time transmission is impossible.

    In visilogic is recomended to setup above 6sec timeout reply time. But i didn't find any suggestion for UniLogic .




  7. I also tried to implement a similar system. However, it was slightly different.
    The presence
    sensor of an object in the camera zone has activated the recognition process.
    Then the camera signaled - the correct object or not.
    If we have a signal about an incorrect object - the PLC at that moment recorded how many impulses need to be calculate to the point when it is necessary to remove it from the flow.
    At this point there was a mechanism of throwing object away. That is, the PLC does not do anything until it receives a signal that you want to remove the object. The other part of the algorithm (shift register for bad object) worked like yours. 

  8. Hi, Visco

    You described the algorithm of the system with a VFD.
    I usually use the VFD internal option to control the brake.

    The brake active when the VFD reaches zero speed and there is no command to move in the forward or reverse direction.
    This eliminates the problems of controlling the VFD in different modes, for example, JOG, FIXED SPEED.

    No need to control the brakes with the PLC. This is especially useful when lifting or lowering some part of the mechanisms.

    However, the VFD must be able to control the brakes.

  9. You can increase the accuracy by increasing the number of bolts on the motor shaft.

    Use 6 bolts and you will have accuracy of approximately 10 turns per minute.
    However, make sure that the sensor has the appropriate frequency range.
    Or use an optical sensor and a perforated wheel.

    Using a 2.5ms interrupt to determine the sensor signal period will not increase the accuracy of the readings.

    It is also possible to use your sensor, diode, RC link, and send a signal to the analog input of the PLC.

    This is not very accurate, but this solution has advantages.
    A similar scheme is used in tachometers of old cars.

  10. You must build minimal Canopen configuration based on BK5110 (used  only  one of IO module).

    Please read


    page 114 about canopen configuration for this type of coupler.

    Then use  Visilogic help with CANopen sample code to build CANopen net step by step .

    Only after succesfull run CAN you  must add another exp. modules and try to read


    page 29 about memory mapping for analog input .

    In that way i tryed  to build my first CANopen with Lenze servo.  Now it looks like simple for me, but at start i had the same problem.

    Best regard


  11. Please read some rules from this two documents:


    I think that problem came with PLC power supply grounding.

    Please try to temporary separate OPLC power supply  . Power them from battery backed UPS (Disconnect grounding of PS)
    Maybe you will see where is problem - electromagnetic  noise or vibration.

    Also check the VFD  specification - is it embedded noise filter present inside the VFD.

    Generaly this type of problem is in incorrect grounding of vfd + motor + equipment chasis.


    P.S. Please check position of noise filter enable  switch inside VFD box.  It present in all VFD.

  12. Hi,

    I try to build project with new V700 panel.

    Large display make possible to use large buttons and fonts visble for  user without glasses .

    Application in V700 is disigned for users with age above 50.

    But alarm display in V700 has small font and little buttons. Stylus must be used.

    It is hard to use V700 alarm display without magnification or glasses.

    Is it possible to switch font or resize embedded to V700 alarm display buttons?


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