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stembera

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stembera last won the day on December 31 2016

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About stembera

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  1. Hello world, connected to a remote PLC via Remote Operator, the object "trend" is often not displayed correctly. Only a part of the curves on the right side of the object are visible. Left part is invisible and can be displayed only by clicking the "M" button. Did you observe similar behavior of the trend object? Is it possible to get rid of this phenomenon? Thanks, Michal.
  2. Dear Juan, unfortunately the answer is no; Prepare PLC Side modem and Initialize PC side modem are different things. "Prepare PLC side modem" is intended for modem which will be located on the remote site via OPLC serial port. Initialize PC side modem is a AT command batch intended for modem which will be connected to PC for remote connection via peer-to-peer modem connection. Almost obsolete today. The first error could come from the three pipe signs before the command. Try to delete them and start initialization again. The next errors come from GPRS related commands, maybe your SIM card or your operator does not support GPRS. If you want to send/receive SMS only, erase all the GPRS-related commands and try to init modem again.
  3. stembera

    Visilogic to Save connection type/details

    This feature is not only annoying but it can also bring a fun to our lives. A year ago I finished work on some project connected through TCP/IP and I opened another one. Unfortunately, I forgot that the connection is not saved with project so when I started to watch process online, I saw very strange things. I was connected to the PLC which was not located in my office but in another country .
  4. stembera

    Remote over 4g

    Hello Steve, as Ausman said, cameras often have its own cloud technology which is bridging your router NAT (like Skype or TeamViewer). Maybe it is your case because there is not NAT record for camera system on your router screenshot. Are you sure your router has an public IPv4 address? Check this on WAN status page of your router. It should have true public WAN address (it must not be like 10.x.y.z or 192.168.y.z or 172.x.y.z). If on doubt, try to ping to your router WAN address from somewhere outside of your LAN. Does Ping work? If not, run tracert command from your LAN to some well known public address in the internet. (e.g. Google DNS 8.8.8.8). The tracert record should show only one jump from LAN to WAN and it must go through your router as the only gateway between LAN and WAN. 3g / 4g routers have very often only LAN address as they are part of the wireless LAN of the nearest BTS. In that case you will need to ask your provider for public WAN address or you will have to use another service (TeamViewer). regards, Michal.
  5. stembera

    Remote over 4g

    Hi Steve, maybe firewall problem? Michal.
  6. stembera

    Remote over 4g

    Dear Sas, if you have two machines connected to one gateway, things are getting little more complicated. Because your router does not know which PLC you like to connect to, you must distinct them by using different TCP ports. You can use port 20256 for the first PLC and 20257 for the second one. Be sure these ports are properly initialized by Socket Init FB on appropriate PLCs. Next task, make your router to divert call from WAN on port 20256 to the first PLC and call from WAN on port 20257 to the second PLC. You can use next screenshot from my router as an idea (Private IP should be replaced with your LAN address of the first PLC; then do the same for 20257 and second PLC LAN address as well). If you have these jobs done, you can use your Remote Operator from the smartphone. Use the public WAN address of the router on port 20256 for the first PLC and the same WAN address on port 20257 for the second one.
  7. stembera

    V350 modem init problem

    Dear Juha, 1. Be sure if you have properly initialized your modem with the init strings which belongs to Cinterion BGS2T. These strings should match both for PC initialization (Init PLC modem) and for the Modem Init block in your Ladder logic. 2. If positive, try to remove commands from the Init FB line per line until the Init FB returns OK. In that moment you have determined which command returns ERROR response. Find the AT reference manual for that modem and check what exactly that command does. In some cases you can omit some commands without lack of functionality. Good luck! Michal.
  8. Dear Vitor, yes, the examples work, indeed. I use this scheme regurarly. If you are on doubt, it is better to break the task into steps: 1. Is your modem properly engaged in cellular network? Modem should be initialized first, MODEM INIT should return Modem status (SI80/82/84, regarding to COM port number) =2, Error code (SI81/83/85) should return 0. If you are using a Check Signal Quality block, Signal quality should be > 0. 2. Is it possible to send SMS? Create some testing event triggered e.g. from the button on display, put your cell number to appropriate field in the SMS SEND block and observe if the block returns no error. 3. Create some SMS to SCAN in the SMS Config block, put the SCAN SMS somewhere to your ladder to be called every scan. Observe if the scan bit is going high after receiving the message. Also check if Last received phone number is exactly your number. You can use the Memory tab in the Output window or just have a look to the hexadecimal numbers in the Last Received buffer (e.g. 12 will be represented as "3231 HEX". If you change your testing code, it is better to restart OPLC to make the modem to be re-initialized. My advice: It is better to use telephone numbers in the international format. If everything above works, join all the pieces together. It should work. Good Luck!
  9. Hello world! I have a problem with HMI display element "Binary text"; it has often (not always!) pink border. This flaw occurs when the element has style "3D pressed", color ON = Green, Color OFF = Gray and Toggle is enabled. It is probably some mistake of display itself because using Remote Operator that display looks normally. I saw this fenomenon on various Enhanced OPLC displays (V1040 / V1210). Do somebody has the same experience? Is there any possibility to get rid of this? Thank you, Michal.
  10. stembera

    V130 Remote Access keys HOLD DOWN

    On my first Unitronics training we were told to NEVER use long hold buttons or combinations of more buttons in one time. The reason was to ensure compatibility between displays and Remote Access / Remote Operator. Let us play with the cards we have got. If you need to avoid unwanted click, it is better to use sequential combination of two buttons. First button ("Action") is permanently visible and active. The second one ("Confirm") is visible and active only for three seconds after clicking of the first one. When operator needs the protected function, he clicks "Action" button. The "Confirm" button appears for next three seconds, the Action button goes to disabled state. The protected funcion is activated only if the Confirm button is pressed in the time when it is visible. After three seconds the Confirm button disappears again and the Action button returns to active state.
  11. Dear MTaha, I have bought one VirtualPLC license some years ago. My experience was not very good. Yes, it can simulate very easy programs. On the other side, when you start to test anything more complex, you will find that most of the Functions Blocks are not supported. And the even more annoying thing – every "download" to virtual PLC takes much more time than a download to real PLC! I had an idea to work in the hotel after returning from the site but it was almost impossible. Maybe they fixed the "unsupported FB" bugs but I keep to be very skeptical. Do anybody else some experience with that software? Regards, Michal.
  12. Dear guys, I know this is a little bit old thread but I cannot resist: Every dividing in the PLC world is very risky operation, regardless if you are dividing integers or float. For totalizers (in my case, to count generator power to kWh) I use another solution: 1. Add the value (power in kW, MI0) every second to the MI, let's say to MI100 (energy in kilowattseconds) 2. Make a test if this MI100 >= 3600 (because 3600 kWs == 1 kHh). 3. If it is not greater, do nothing. 4. If MI100 >= 3600, increment kWh counter (for example MI101) and MI100 = MI100 - 3600. 5. Go to back to step 1 .
  13. stembera

    Has anyone done this yet?

    Don, try to play with System Integers SI103...SI110. Probably you have set them to 0, i.e. OPLC will keep the dead connection for infinite time. If you put some meaningful value to Socket TCP keep alive and TCP keep connection (something between 100 and 600 is suitable), the dead connection will be closed by OPLC and Remote Operator can open them again.
  14. If I can recommend, there is a nice example of High Speed frequency meter in VisiLogic under menu: Help --> Examples --> Version 900 --> Project Examples --> HSC_HSO --> Frequency Precise meter. Program is written for V570 but it will work for V430 also (some changes in hardware config required). Good Luck!
  15. For these tasks, a reliable modbus simulator for PC is absolute priceless thing. If you are in doubts, the first task is to check the setting with simulator. It is much easier to find problems if you can change the communication parameters interactively "on the fly" without changing, compiling and reloading PLC program. When the device communicates with PC without bugs, then it is the right time to start comunicate from PLC. Good luck, Michal.
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