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sgull last won the day on July 1 2017

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About sgull

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  1. Master and Slave at same time...

    I also have that error- Do NOT place "COM: MODBUS" Ladder elements on the bus bar, or anywhere it will be continuously activated. Use a delay of 10-50 msec between requests. Click on "Find All Elements" to locate all of the instances where it is used in the program Also the command is not being called continuously (with a positive transition contact). The program appears to work OK,but I still get this error at each download. Any help would be appreciated
  2. Hi Hasse Give a look at the following link. It should help you solve your problem. Regards Denis
  3. UL Type Environmental Rating

    Hi Jared UL type 12 is close to IP55 so the Samba rated at IP66 is a higher standard. Attached document may help. Regards Denis IP65 NEMA compare.pdf
  4. How many PID's?

    Hi Selli If you go to the PLC page for specific PLC (the following for the JAZZ) https://unitronicsplc.com/jazz-series-jazz/ If you scroll down to overview it gives you an idea of what the capabilities are. Regards Denis
  5. Thanks for that. I could not find it before and the help file did not mention it. I use the data table method to save information in VisiLogic, but a screenshot would be easier for a customer to send and debug. Regards, Denis
  6. Hi Folks, Is there any way to trigger a screenshot within the ladder? I think it would be a good feature to to have a screenshot that is triggered in the event of an alarm or other event. In this way we can put a lot of data on a hidden screen that would be captured to help in diagnosis of a fault. Regards, Denis
  7. Hi Marko Normally the decimal portion is the result of a divide function. You probably do all of your math with MI whole numbers and then divide to get the decimal portion. when you divide an MI the portion after the decimal point gets stored into SL4. You can then use a simple compare to determine if this value is big enough to be rounded up or not. You must use SL4 directly after each math function as it will be updated with each divide function. Hope this helps. Regards Denis
  8. Juan As Flex says the positive transition should only be for one cycle. As the name suggests it activates when the bit goes from low to high. You should be able to keep your finger on the button indefinitely and it should not activate a second time as now it is a closed contact regardless of the number of scans or the scan order. Check for other instances of F1 in your program in case you have a normal contact instead of a positive transition or in case you have a reset coil somewhere on F1.
  9. Hi Flex This is strange. If he is using the jump condition on the displays then they are already positive transition contacts. If you look at Visilogic where it says jump condition, the symbol for positive condition is shown. I assume that it is done this way to prevent this from happening. A look at the program would help.
  10. Hi Juan What you have done is probably ok. but just check that you are using a positive transition contact of F1 and not just a normal contact. A normal contact will switch several times during the scan time of the PLC whereas the positive transition will pulse once each time it is pressed. Regards Denis
  11. Hi Streamer Try downloading the latest version of visilogic. When I tried to open your program it said it was made with an older version. If the Samba is new the operating system installed may be newer than your visilogic version, This may cause problems with compatibility. Regards Denis
  12. The alarm function in the UniStream is really good and easy to configure. We currently use the vision series to control refrigeration compressors. When we get an alarm or a fault we save a large number of integers and bits to a data table to indicate temperatures, pressures and status at the exact time of the alarm. Of course we can still do this with the current UniStream and use ladder to trigger the store of data at the time of each alarm. However I think it would be a nice future feature to have a button on the current alarm history screen that would bring up a configured data table (or an automatic screen shot at the time of the alarm) whenever a particular alarm is viewed. Regards Denis
  13. USB stick (DOK) is not recognized by PLC

    Hi Aus I have always been led to believe that size doesn't matter. Always something new to be learnt on these forums. Regards Denis
  14. UIA-0402N Flow Meter Wiring

    Hi Sanyc From the document it says that the output can be passive or active. If it is passive the output is 4-20ma and you should connect the positive of your 24v supply to the + of the instrument (terminal 26) and the - of the instrument (terminal 27) should go to the input of you analog input card. If you select active than the - of the transmitter (terminal 27) is wired to the 0 common of the analog input and the + of the instrument (terminal 26) is wired to the input of the analog card. in this case you can select 0-20 or 4-20ma. Regards Denis
  15. UIA-0402N Flow Meter Wiring

    Hi Sanyc If it is an active transmitter then the transmitter has a separate power input. Make sure the 0v of the transmitter power supply is linked to 0v of the unitronics input. you should not put a resistor across the wires. If you still have trouble please post a sketch of your wiring and the transmitter details. Regards Denis