Jump to content

kratmel

MVP 2023
 View Profile  See their activity

  • Posts

    1,148

  • Joined

  • Last visited

  • Days Won

    52

 Content Type 

Posts posted by kratmel

  1. RS485 communication with Mayekawa CP IV with V1210

    in Best Programming Practices

    Posted

    Hi, i do not find full manual, but as i know - you must use correct wiring (four wire half duplex used) for MODBUS communication and set correct communication channel in panel setup menu.

    I find modbus manual for new type of panels

    https://mayekawa.com/americas/mna/downloads/pdf/CP Integration/MYPRO Touchplus/DEVICELISTMYPROTOUCHAREA.pdf

    https://mayekawa.com/americas/mna/downloads/pdf/CP Integration/MYPRO Touch/MYPROTOUCHDeviceListMYPROTouchAreaManual.pdf

    but you must use appropriate for your panel. 

     

    • Like 1

  2. V130-33-TA24 analog output cold start problem

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Thanks for the tips.

    I tried different solutions and eventually found the easiest in my opinion.

    second_restart.jpg.ec1d8dcd7decb2318b27acb8793b8e73.jpg

    The only problem that arose was the pause (best tested = 3s) I had to add to ensure that the analog outputs could be restarted.

    During this pause, I load on the screen text "Program is loading...".

     

    P.S. I studied the hardware of a faulty PLC. I found that during the cold start there is no CLK signal coming directly from the PLC processor to the DAC.

    Only a reboot with some delay causes the desired signal to appear. That is, the PLC must be replaced with a new one.

  6. V130-33-TA24 analog output cold start problem

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    I pointed out that after turning on the power PLC does not activate the analog outputs.

    Second restarting the PLC by turning the power off and on is also a cold start, but it helps to get the PLC back to work.

    The time works here - if i turn it off and wait 2-5 minutes - the analog output will not start again.

    Actually, I tried to restart the PLC through the info mode and through Visilogic - it help to activate analog outputs.

    Therefore, the main question is how to evaluate first cold start and second hot restart. 

    That is, to find a sign by which to limit the number of hot restarts after turning on the power to one.

  7. V130-33-TA24 analog output cold start problem

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi,

    In one of metal bending machine V130-33-TA24 PLC used for control backgauge positioning.

    Machine work without problem 2020-2022. One of two present analog output used for 0-10V vfd speed control.

    Now I found problem with both analog output after machine cold start. No output = 0V present when machine started and operator try to do homing proces (no speed setpoint present on VFD analog input). All digital input, output and encoder HSI work without problem.

    After reload firmware, reset&init, blank project download and reload machine aplication project - no succes. Visilogic V9.8.65 and firmware used for progaming application in 2020. Power supply is changed to new one.

    I was able to investigate that a hot restart of the PLC (power off and on or reset via Visilogic) returns the operation to normal and the machine can work. If PLC (or machine) is disabled for 5min analog output not start, restart needed.

    I turned to support and received an answer about a hardware problem in the PLC. Unfortunately, in the current situation in Ukraine, I can not replace the PLC with a new one. I had to make a operator power switch for the PLC so that the machine could work.  However, I think this is dangerous because the operator may accidentally turn off the PLC while the machine is running.

    Now I have an idea to implement a software restart of the PLC using SB300. However, after experimenting with different options for software restarts, I usually get either a generator that constantly restarts the PLC or a restart does not occur.

    I ask users of the forum for tips on how to restart the PLC after turning on the power, but only once without the use of external circuits. I feel that there is a simple solution, but have not yet found it :)

  8. SAMBA 43 J R20 CANbus not initializing

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi,

    Two tips for you about NOx not start.

    1. Average current on NOx =1.5A.  Peak current can be above 10A (typical 6-10A) for internal PWM in cold condition. Than you must use above 10A PS or battery for sensor power. 

    2. In ManualNox on the last page present Start Code. Maybe it must be programmed in Request tab of J1939 FB.

    If it possible, please post all pages of sensor manual.

  9. PLC Unitronics communication with another company's frequency converter

    in UniLogic Software

    Posted

    1 hour ago, Patko said:

    2 will be in drive 2650 but I will only send number 2 from the PLC to the drive

    Yes, this is exactly the option I was talking about. In practice, the position number can be selected by inputs or by communication network.

    As I mentioned above, the signals that need to be transmitted from the frequency converter to the PLC are "movement completed in the desired position", "frequency converter in good condition", if necessary, you can transmit more errors of the frequency converter.

    • Like 1

  12. PLC Unitronics communication with another company's frequency converter

    in UniLogic Software

    Posted

    I try to find info about your absolute encoder with embedded CANopen.

    https://www.nord.com/media/documents/bw/ag_0100_en_3216_screen.pdf

    In this manual present CANopen encoder feedback commisioning and on p.69 present info about possible preprogrammed fixed position (63 for 530E VFD).

    I think best way to control this application is operate with preprogrammed in VFD fixed positions. Then in PLC you can use 4 bit binary coding for 16 absolute  position changover. In this case no modbus connection needed. One problem - find way (parameters on VFD)  for fixed position program and switch via VFD logic input and program logic VFD outputs - in position, VFD ready (OK).

    P.S Yes you can program and change current positions via fieldbus (CANopen, MODBUS). But it is not easy way.

    p.p.s Second VFD positioning must be controled with two proximity sensors?

  14. PLC Unitronics communication with another company's frequency converter

    in UniLogic Software

    Posted

    Unistream side not support Profibus.

    You can use one of embedded to Unisream protocol, please find all possible on Unitronics site

    https://www.unitronicsplc.com/unistream-series-unistream7/#1449515771593-63d974b6-05ac1451602511853

    Or try to find some protocol converter

    But i think change inverter to the upper model needed.

    I do not know about your application. Maybe use Unitronics Servo product is the best way.

  21. Specific functions on unitronics servo drive

    in UniLogic UDFBs

    Posted

    As far as I know - a rotary knife can not be implemented using the capabilities of the Unistream+Servo platform. This application requires high-speed positioning circuit processing with two encoders - material speed and knife motor speed.

    Such applications require specialized processing modules and appropriate technological software. I am familiar with solutions from Siemens, Nidec (Control Techniques) and Koolmorgen.

    The only case where this application could be built yourself with free software sample code - is a hardware kit from Control Techniques (Unidrive SP +  SMEZmotion with  Power tools Pro software) but Unidrive SP is out of production. All other solutions require additional costs for both  hardware and software.

    You can contact support@unitronics.com for information.

    • Like 1
×
×
  • Create New...