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Kikis last won the day on November 22 2018

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  1. Hi Guys, I have a customer asking to have remote access to the webserver of a Unistream PLC via internet (everything works perfectly in the local network). I'am thinking to use EWON COSY vpn router in order to achieve a secure connection. Is there anyone who used this device before? What about connection reliability and response speed? Do you know of any other similar product which can be used for such an application? Thanks and Regards, Kikis
  2. Kikis


    Thanks Aus and Kratmel for your replies. Yeah, that's exactly what i was thinking as a solution.
  3. Hi Guys, Today i made a travel of 60km to check a problem on a JAZZ PLC after getting a phone call from the customer. From his descriprion during the phone call, it was clear that O1 (relay output) was worn out, and it was indeed. So i downloaded a new program to replace O1 with O5 which was not used and installed an RC snubber accross the driven AC coil. What is the best and easiest way, in terms of programming, so that the customer would be able to replace inputs and outputs from the HMI screen?
  4. @Cara Bereck Levy Btw for such applications which require X-Y servo positioning, it would be great to have a special PTO function block to perform synchronized linear motion using the 2 axes (Linear interpolation).
  5. Hello, I'm attaching an example i made based on your description. I have set the timers for FWD and REV direction spinning to 3min, but of course you can set the values as you want. EXAMPLE_1.vlp
  6. Kikis


    There is no doubt that it's a matter of sales and money. Since all major manufacturers of "smart programmable relays" or mini PLC's have 100-230VAC models available (Schneider Zelio, Omron Zen, Siemens Logo), i suppose that there is true demand for small controllers with such specs.
  7. Kikis


    There is equipment and machinery powered by 3 phase -3 wire 415V (Neutral is not used), such as industrial water chillers and air compressors. Manufacturers usually use a transformer to get 230V secondary output and use it as the control system's voltage. Sometimes is not straightforward to switch from an existing 230VAC control system to a 24VDC PLC unit, it requires a lot of wiring changes and extra cost.
  8. Kikis


    Hi Guys, I was recently working on a small project to replace a Zelio programmable relay with a Jazz PLC. Zelio's power supply and inputs were 230VAC, so i had to install a 24VDC power supply to feed the Jazz and the inputs (limit switches, push buttons, etc.) In addition, i had to replace two 230VAC magnetic sensors attached on a pneumatic cylinder with 24VDC sensors. I was thinking that It would be great if we had some JAZZ models available with AC power supply and inputs (100-240V).
  9. Hi Sunit, Great work! I have successfully completed a similar project in the past. I'm using CAM software to extract X-Y hole center coordinates from the CAD file which i store in a data table for positioning. Could you please share how did you manage to transfer AUTOCAD DWG files to V130?
  10. No, there is no offline simulator in Visilogic software. In order to run your program, you need to be connected to a PLC.
  11. Kikis


    To be able to establish connection, you need to install USB driver. There is a button to do this within U90 ladder software as shown in the photo below (Controller / M90 OPLC SETTINGS). Make sure you use the same COM port number in U90 PC communication settings.
  12. Hello, You can use direct contact of SB15 (100mS pulse) as a condition to increment an MI from 0 to 100 (10 Sec). Then use Linearization block with the following settings: - Link this MI to the X value - Link your analog output to the Y value. - Set Y limits to the analog output range (0-4095 for 12-bit analog output) - Set X limits to 0-100 If you want to achieve ramp-down function, simply use SB15 to decrement the MI from 100 to zero. (PS) As Aus wrote, all frequency drives support ramping function. Never saw a VFD not capable of doing this, it is the acc/dec parameter for most of the drives.
  13. Hi Aus, Thanks for your great feedback. Since i'm very concerned about durability and reliability of the system, i finally decided to go with a special controller programmable in CoDeSys.
  14. Hi Guys, I have a new project to retrofit a mobile (vehicle) pile driver machine and I'm now in the process of hardware selection. The machine's decentralized control system was based on an obsolete CANopen Master controller made by IFM. It is a special controller for mobile machine applications and designed for harsh environments with excess vibration. Basically the question is: A normal PLC would be a reliable solution or should i use a controller specially designed for that purpose? What I'm thinking is to use a V570 (to be installed inside operator's cabinet) along with some third party CANopen I/O modules and sensors. Does anyone have any experience with using Unitronics PLC's for such applications? (PS) There are a lot of special controllers for mobile applications out there, most of them are based on CODESYS.