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Found 156 results

  1. Hi, I'm trying to build a log for my system using the Store DTI to File function. This runs after the struct containing the date is inserted into row 0 of a table, which should be appended immediately to the log file. The writes are sufficiently spaced (~30 minutes) that the SD write interval isn't an issue. I've found that when using option 2 "Only CSV" for the "Create CSV" input (F), the file is simply overwritten, and only ever contains 1 row. Option 1 "Create CSV File (All - udtf,csv,csv.zip)" does append correctly. In both cases "Append to File" (E) is set to 1 "Data will be appended to the file". This looks like a bug to me, and combined with the missing documentation for those options, I've wasted a little more time than I'd like trying to figure that out. Option 1 is an acceptable workaround, so I don't need further support, but this should be fixed. Sandy
  2. Hi there, I'm guessing that the FB that you're talking about is in Visilogic rather than Unilogic? I'm having big problems with this in unilogic. I'm trying to concatenate a bunch of strings and I just can't get anything to work reliably. Is this function synchronous or asynchronous? Any ideas why I'm having problems?
  3. What is the most efficient way to store date and time in an excel table so that it is easily view able in Excel? I converted it to a string, but the strings take up too much PLC memory. Excel can't natively interpret Unix time, so that won't work either. Is there something else Excel can interpret that I can store it as?
  4. Hello all, I am using IO remote analogue card URA0400T (16 Bit) and IFM pressure transmitter 4-20mA 0-10Bar. Attached you will find the linearisation but the output value is wrong. What am I doing wrong ?
  5. Dear All, I am doing as follow: import a CSV file (copied from USB stick in the "data folder") with a single row of 23 Strings (each String is 25 lenght); create a UDTF file from this CSV; upload the UDTF to a DTI; read the DTI row. each of these action is done in a specific ladder rung; each rung check if the previously action was perfomed without problem...then at the end my CSV is converted; the DTI il filled with right values but when I read the DTI row I don't have any error (exist status "0") but the struct variables is not filled (all single field is empty)...I tried to write the DTI with the same struct and all works...the DTI take the new value...I forced the action (cvs->udtf->dti->read) then the DTI take the value of the CSV file but nothing change...the struct fields still have the previusly values. what can be wrong?
  6. Hello, I noticed that the Unilogic software doesn't provide counters like other software's do. I am having trouble getting out of a loop pulse timer. I am trying to get out after it loops 5 times through. Any ideas?
  7. Hi. Hope someone can help. I've got 2 analog input cards in my system. All configured the same. The one card my temp is stable but the 2nd card the reading fluctuates a lot. from 1 to 35 to 17 and so on. Connected pt100 connected to convertor to 4-20ma directly in panel to see is cable fault. Still the same. Any ideas please. Thanks.
  8. Hi Everyone I am a bit of a newb and using a US57/ -B10-TR22 PLC with the current version of unilogic The short version of my question is: when there is a power off/ on when the PLC reboots does it start the scan from the top of the ladder or does it continue from where it was when the power went off? Is there a way to make it default back to the top of the ladder? My Long explanation / issue is I have a bit that activates a compressor - even though the bit is supposed to default to 0 on startup and i have a initial cycle set bit to 0 condition if i turn the power off when the compressor is running for about one second as the PLC is intialising the compressor will come on for a second I can only assume this is the time it takes the PLC to scan from where it was on power off to the condition that resets the compressor bit... It's for an aerospace application Any help greatly appreciated Kind Regards Tyler White
  9. Hello, I have an Unistream panel and EX-RC1+ D16A3-RO16 + LC3 units hooked to it via CAN bus. I have to read position from an encoder (with A, B and Zero inputs) and wonder if someone here would give me an suggestion regarding hardware for the job? Should I just add an IO unit (and which one) or could I replace the D16A3 unit with another which also supports encoder readings? Thanks, Bjarni
  10. So Im now getting my head around unistream, many thanks flex727 for the point to the examples. I have successfully got comms between uni stream and vision and have got most of my control under way and working. Took a while to get used to the new layout and working but im getting there. Question.... How do i send a set time to vision? In the vision plc there is a time entry function that communicates to other vision over modbus. I can't seem to read and write a set time both ways. uni-vis/vis-uni. Temperature settings are fine as i just use a numeric input. Just need hours and mins, is there an input for this. Many thanks, Steve
  11. Why it is not possible to insert P and N contacts inside a function?
  12. I can find no information on the string function usage. This seems to be not included in the manual. I need to do string manipulation. Sifting thru all of the internet for answers is making me not happy again. Time is money. If someone out there has this information could you please post it. Thank you in advance.
  13. Hello, I'm just starting my first project with UniStream/UniLogic and I have the PLC hooked to a PC via Modbus, PLC as Slave. I haven't found a way to sync the clock in PLC with the PC clock. Is there a way to set the PLC clock via the Modbus ? Thanks, Bjarni
  14. Hello! I am tracking some values in my application thru MQTT and would like to trigger a publish event if for example a value changes for a fixed amount or percentage. What I am using right now is periodic transfer but would like to save some bandwidth if data isn't changing much. Also, I need some kind of general solution to implement it on 50 values. Let me give you an example: we are monitoring an outside temperature. The sensor is quite unstable and changes in tenths every few seconds. It's value table at 10am might look like this: 10:00:01 102 = 10,2 degrees C 10:00:02 102 10:00:03 103 10:00:04 104 10:00:05 104 10:00:06 103 10:00:06 103 ... You get the idea. Now, I do not need to transfer these minor changes to my broker every second or on every change. I would like to detect a change of 5 tenths and only then send the data to my server. And periodically every hour for example to have records with timestamps. What are the possible solutions with UniLogic to achieve this kind of reaction with hysteresis? Regards, Ales
  15. Dear, I'm trying to copy a file from a DOK to the SD; the status stay always at 1 and never change (and the file is not copied). The function is "called" by a HMI button that set a bit...in the same ladder rung this bit is reset...then is called just one time. If something in the UDFB was not set properly I should had a negative value...but this doesn't happens. What can be? thnaks
  16. Hello, I am a beginner and am having trouble completing this task. I am trying to turn outputs on from a push button for about 30 seconds, then off for 2 minutes, then on again for 30 seconds. Repeat 5 times. After the 5th time, I would like to increase the off to 4 hours. This happens until someone manually presses the reset button on the HMI. Any help would be appreciated. Thanks
  17. Hi all, It is possible to change screen on web server from ladder? I tried do it by action function but I can choose there only HMI screen. I need it to inform remote user about alarms. User often have web page minimilized on windows try and he want to be inform about alarms by web page icon blinking, maximalize web page or some alarm sound on his computer. How I can solve this issue?
  18. Not much to add to the title. When using a timer.out bit to trigger a digital alarm, UniStream is not detecting it. I had to set a bit with the positive transition of the timer, and then reset it after the alarm state has been activated.
  19. Hello, my PLC has been working for the last 3-4 weeks. One day I come in and it starts to give me this error. The firmware is up to date (unless there was an update within the last month or so). Any help would be appreciated.
  20. I decided to use Internal Control Bit Arrays 2 x(255) on this large project to keep the global tag list manageable. I need to reset all these bits with an HMI button. Is there a way to reset an entire bit array? I get compile errors when attempting to use the reset coil. I really really don't want to have to put reset coils in for 500+ bits Thanks in advance
  21. Hey, Each day we want to start writing data to a new file. Our file name string is updating fine using the rtc to ascii UDFB, but our store DTI to File status turns 1 when the filename is updated with the new date. Then after another full "day" it becomes -35. However if we never change the filename the data recording continues to work fine. I apologize if this is already explained in another forum but I wasn't able to find one. Thanks for any help your willing to give.
  22. Hello, We are able to log sensor data to the data table, we record it once every 5 seconds. However, after 10 recordings we are trying to write the 10 lines to a csv file. (Ideally appending it) Firstly, appending just doesn't work (when we put the 1), the file doesn't update at all. When we put 0 to override, the values go in but only one and a half rows. Any ideas? Thanks!
  23. Hi everyone, We were given a lot of calculations to perform based off of the input values from our sensors. These calculations include square roots, arc tans, etc. as well as decimal constants such as 0.3874638 for example. We've tried to scale all our numbers so we can work with everything in integers but the function on the screen is getting very large and complicated. Performing these calculations in coding languages like python would be very straightforward. I'm wondering if there is a simpler way in unilogic to perform these large calculations or any tips to keep our screen from becoming so full that it will be impossible to debug errors. Thanks!
  24. Hey, For some reason my UIA-0800N is getting readings without my CT being plugged in its a fluctuating number and its happening with all inputs. Also does anyone know how to scale a CT(current transducer) and why when i put a constant voltage source in as an input it still fluctuates? Thanks
  25. Hi all, I have button on the screen. When touched, one out of many actions is to set certain bit high in logic to enable rung (if button is not touched, the rung does not perform anything). The rung works nice and perform everything as expected, except for the enable bit stays 'set'. The function 'reset bit' is only for integers. I do not want to use entire integer to enable/disable rung. If used integer to enable rung, the action from HMI can be increment/decrement only, therefore I would have to put there two conditions :equal-less 0 then store 0 and equal-greater 1 as conditions then store 1, to actually stay in 0-1 range. Or is it possible to access integers that are used for data types 'bit', then I could use the premade function reset bit (in integer) like mask byte in assembler. Does anyone have any better idea how to do it, please? Thanks
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