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AlexUT

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Posts posted by AlexUT

  2. Low-pass filter

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi,

    Low-pass filter in Ladder is more like to DSP (Digital Signal Processing), which require special hardware module, or lot of resources.

    Some PLCs have a Filter option in Hardware Configuration, and other PLCs can use Filter option from FB's Menu.

    Please look an next link from Control Engineering:

    Ladder logic 402: Data manipulation and filtering. Frank Lamb.

    http://www.controleng.com/single-article/ladder-logic-402-data-manipulation-and-filtering/e589114a10276058909584cea125cbcf.html

    Please remember, that conversion time for analog inputs will be number of system scans.

    B.R.

     

    • Upvote 1

  3. NTP amd DST

    in UniLogic Software

    Posted

    Hi hotwires,

    There are 2 examples of time synchronization, for V570 and V700.

    Both are located in Examples directory":

    C:\Program Files (x86)\Unitronics\Unitronics VisiLogic_C\Examples\Version 900\Project examples\Communications\Ethernet

    Daylight Savings Time cannot be automatic updated, as it changed from time to time.

    You have to take care to decide, when to change DST. Rest is done by RFC-305  FB and some logic.

    The same is for sync intervals. You have to select applicable for your project sync intervals.

    If you have a specific requirements for your project, please send us project potential evaluation with detailed requirements description, and we will pass your requirements for evaluation.

     

    B.R.

     

  4. GSM modem + Unistream = VNC+SMS+EMAIL...

    in UniStream: Hardware

    Posted

    Hi REGEX,

    Adapter, you use, based on FTDI chip.

    :Chipset: FTDI"

    This chip is supported by Windows, but not supported by UniStream.

    To connect and use Cinterion EHS6T modem with UniStream, you have to use USB-to-Serial converter, based on Prolific chip.

    Unitronics supply such converters - Sunix USB to RS232 adapter model UTS1009B.

    This cable has been tested by us and clients and it works.

    Please see following link: http://www.sunix.com/en/product_detail.php?cid=1&kid=4&gid=14&pid=1136

    You can use similar , Prolific chip based converter.

     

  5. HSC Interrupt with PTO problem

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi Nicolche,

    Yes, VisiLogic does not allow to use PTO in an Interrupt Routine.

    What are requirements for servo (do you mean stepper control by PTO?):

    -Is a knife movement one direction, or both directions?

    -Does knife, one time activated, cut and return to initial position, or it should be returned by opposite direction movement?

    -How long knife may stay at end position?

    -Can you use "High Speed Outputs (Stepper Control)" from Hardware Communication settings?

    You can send all details to support@unitronics.com.

    B.R.

  16. V570 PID autotune issue

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hello Vidmas,

    After 6 year some elements of PID loop will have degradation.

    PID FB is a piece of software, keeping all PID parameters in linked MIs and MBs, and in block of 32 MIs.

    Once you run PID Autotune for the first time and satisfied how it works, you have to save PID parameters for feature reference.

    If PID cannot work stable, in most of cases you have to check other PID loop elements.

    I recommend you to check all equipment in PID loop - sensor, actuator, etc.

    Do you use Analog, Digital, or Relay output for PID output (CV, or Control Value)?

    You can completely clean  POD parameters by cleaning linked MIs, MBs, and block of 32 MIs.

    Than you have to run PID Autotune again.

    I hope this helps.

     

     

  18. EXF-RC15 and HSC

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi,

    It will be due to different internal impedance.

    There are different V130 models with different input impedance.

    V130 -TRA22 have an input impedance 4.5 kohm for I 0 - I 1.

    V130-T38 have an input impedance 3 kohm.

    EXF-RC15 have an input impedance 4.5 kohm for I 0 - I 5.

    So it is dependent of V130 model you tested.

     

     

    For sensor with NPN output you have to use pull-up resistor.

    B.R.

  21. EXF-RC15 and HSC

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    As I see from Quick Start Guide, outputs are PNP or NPN. So you have to use pull-up/pulll-down resistor.

    http://info.bannerengineering.com/cs/groups/public/documents/literature/177900.pdf

    Additional to this, you have to connect input terminal 10 (n/p) to either  0V or +24V - configure inputs as PNP or NPN, in accordance to used encoder.

    This will eliminate disturbance if one input to other.

    B.R.

    • Upvote 1

  24. How Do I Load a Project with the SD Card?

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi all!

    I found 2 critical problems with SD cards, when SD card is not detected at all, or detection take long time - more than 1 minute.

    1.When SD card include non 8.3 named files. Such files will be created by some PC applications. I found one of such application is automatic disk defragmenters.

    Such software cteate hidden long name files on each SD/Disk on key, etc. devices, connected to PC USB port.

    Solution  - use PC which have no such software installed, or uninstall it. Format of SD card is recommended to restore its normal condition.

    2.SD card lost its capacity.Solution - download Panasonic SD card formatter from  site and re-format SD card with RESTORE CAPACITY key.

    I restored number of SD cards by this software.

    3.Do not use cheap SD cards of unknown manufacturers. I failed with such 8 GB card of unknown manufacturer in Saturn store, Germany. Bought it to have SD/Mini SD/Micro SD adapters. But SD card is not working from the box.

    4.Use Safely Remove Media icon to remove SD card from PC.

    I hope this helps.

  25. Need Help with RTD Setup

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Hi,

    For better help please provide more information, like RTD nominal resistance, link to RTD specification, full RTD model number (see p. 4 of document). etc.

    It seems, that you are talking about next RTD:

    http://ultra-nspi.com/product_groups/nuclear/nuclear_pdf/Models_601.pdf

    Current parameters you mentioned are for maximum RTD load, which in most cases is not reached.

    From this document follows, that there are 4 models of RTD sensors, 2x100 ohm, and 2x200 ohm.

    Unitronics PLCs supports 100 ohm RTD.

    You are not referring to PLC model. You can read V350 RA22 settings for RTD at following link:

    http://www.unitronics.com/Downloads/Support/Technical Library/Vision Hardware/Vision350 Installation Guides/V350-35-RA22_J_DOC13005-A3_06-13.pdf

    You have to configure Analog Input by jumpers, see page 4 and 6 for details, then configure it in VisiLogic Hardware Configuration as PT100 with corresponding "alpha" coefficient.

    Then in linked to this Analog Input MI you will have temperature in 0.1 C. having 235, you have to read it as 23.5 C.

    I hope this helps you to set it up.

    B.R.

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