Search the Community
Showing results for tags 'ladder'.
-
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
-
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.
-
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!
-
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!
-
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
-
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
-
Hi all, If I get the infinity in real data type, what could be the reason, please? (I have checked if I div by zero.) I also have tried to store the same exact value through the program into that variable. Still "infinity" in the last rung/DTI table when I am online. Thanks for any help.
-
Hi All, I'm new to this and desperately require your help. I give up.....i'm trying to create a program to activate two timers when a button is pressed. I've created the Ladder and can get my green icon to show for 3 seconds when I push the corresponding button but I just can't get the relay to energies for the set amount of time. When the relevant button is pressed the output energies for as long as the button is pressed and completely disregards the output timer. Could anyone look at the attached to see what i'm doing wrong please? Thanks Justin EID Speed Lanes_ modified1.ulpr
-
Hi all, Would you mind to show me some example how to treat INT16 as a power in W and its scale factor INT16 received via Modbus, please? Should I firstly convert them into Real, then multiply them? Thanks
-
Hi all, I realise that I can reboot from UniApps but is it possible to do a reboot from Ladder/HMI. Reason being, my Modbus IP comms (over 3G) seems to get 'bogged down' after a few weeks/months and stops communicating. My golf course customer then angrily complains when his lake overfills because the fill pumps haven't stopped as comms is lost, I then log on and reset it manually from UniApps and away it goes again until next time. Id like to routinely reboot the PLC to prevent this scenario and also have a button on the HMI for the end user to press if needed rather than calling me.
-
I'm trying to use a for loop to go through each index of an array and get averages for the total array. I need to do with on 8 arrays so I need to also use a global array to store the averaged values. How do i use global variables in C functions or declare them in C Functions?
-
Why can not I change the arguments of function C. When I put the cursor on the line with the name of the function, do not enter any characters from the keyboard?
-
Hi, I need to generate a random number (integer) values between 1 and 10 (or 100) in UniLogic. Is there a special FB? If not, could you pls. share UDFB?
-
Hi everyone! I need advice what is the right way to load from an array? Below is picture of my ladder, where is also shown previously stored data in the same array that I want to load from. Rung 6 - data is saved from C (TalkKgIzmereno) into B ( Array Talk[Array Talk_0] ) Rung 7 - I want to load result from B ( Array Talk[Array Talk_0] ) into C (proba) Storing in Array woks perfect, but didn't have success to load... Thanks in advance! Petar
-
dears All, I will have to modify an old project where I used a lot of retained tags (was my first project and I was not very skilled...for sure worst than now 😁 )...I want to replace the retained tags with a struct referred at a DTI...then save this on the SD. my question is...if I will upload a new project , the same but with more UDFB-tags etc, the retained tags that are used at the moment still contain the same value or will be reset? just to know if I can do this without problem, because I will also update the PLC version, or if I have to think something to save the retained tags and upload these later. thanks
-
Hello! I am a senior at UNew Haven in CT, currently building a machine that should mix gravel and water. I am a mechanical engineer so I have no idea what to do or where to begin! I am using the Unitronics tutorials but they are long and my time is limited We are using a VFD and V570 with PLC and HMI. I need the PLC to: 1. Move a linear actuator up and down 2. Using the VFD, to control the speed of the mixer 3. Control the duration of mixing (Created a preset keypad timer but not sure how to make number buttons and how to embed them to the keypad.) Any help or guidance would be very much appreciated Best -
Hi all and thanks in advance, I have a program running un a Uni stream USP-070-B10. Using software version 1.25.61 UniLogic studio. I am trying to find a bit that will tell me if any Alarm is active, I have looked thru the help file, system variables, and searched this forum. I did find a comment from Saragani posted July 1, 2015 stating: " On the next version (1.15), it is planned to have a tag that contains: * An array of 32 bits (one per group * An array of 1025 Bits ( 1 spare bit + 1 bit per alarm) * A bit that indicates that 1 or more alarms are active * An interger with the total number of active alarms" Am I just blind and missing something? or did it not get added? The reason I am looking for this is I have a client with a remote cabinet with the PLC in it (no network connection or outside connection but power), they want a light added to the top of the cabinet and turne don if any alarm is active so they can see they need to go out there... Thank you for any assistance you may be able to provide, Bob
-
Hello, I have a rain bucket to monitor every 0.1mm of rainfall. I would like to display how much rain there has been within the last 24 hours, 7 days and month. I thought the best way might be to use a data table and 'insert row' which would push out old values, but to then acquire the sum of the data table is a convoluted process. Any suggestions on how I could achieve my goal?
-
Hi engineers! We can't implement this kind of contacts in the UDFB´s, so could u tell me how can i simulate type of contacts inside my UDFB?? Regards.
-
I am trying to make a running totalizer in unistream. Trying to figure what best way to that. I am kinda new at the unistream line, but it has been pleasant experience. I attached what I had. Any advice on how should go about this. Trying to calculate GPS on flow. Thanks
-
This may seem trivial but is there a way to define the zoom setting in ladder editor so when you open it it starts at say 70% instead of 100%? I did not find anything in the Project-Options but was hoping it's somewhere else? I have 18 "modules" that I need to open and close regularly and when I re-open it, boom Gigantic. Additionally, to the mods: How many posts do you need before your comments and posts need to be approved?
-
Hi everybody, We have UniStream controller running application and modem for sending SMS alarm messages. Each alarm has it's own bit, that enables SMS send routine (from example library with operator string, now we have 3 operator's phone numbers). Now after some time we noticed that sometimes messages are not sent. Seems like there is problem when several alarms occur at same time. Maybe someone has suggestion how we could sort this issue? Thank you.
-
Is there a way to re-order regions? in the ladder?
-
Hi I have a 7" UniSTream with a WCB-1 adapter. I am using this PLC for a very simple task of monitoring contents in a tank and then controling some relay outputs depending on the tank contents level. I have a pressure transmitter connected to a analogue input 0 and this was working correctly whilst setting up - I was seeing the correct output from the transmitter on the PLC. I also had a type K thermocouple connected to RT2 input - again during setup this was giving me a correct reading at ambient (approx 20 Celsius). Now, during some updating of the logic, my transducer input is showing over range constantly (16689 units when the adapter is scaled to give 16383 maximum output) and my thermocouple is showing a tempoerature reading of +4359 Celsius. I have checked the various status' of the WCB-1 and this is the outcome: IO - Status 00000000 Analogue Input Status Input 1 (transmitter connected) - 2 Analogue Input Status Input 1 (transmitter disconnected) - 16 Internal Info - 363 I have uploaded a blank project to the PLC, and I am still getting the same problem. Does anyone have any idea why I have run into this problem? Thanks in advance
-
Hello Gents and Ladies, I am new to the unistream line. Haven't had chance to take the seminar for it. It definitely little bit different then Visilogic line as for programming. Just trying to figure the math out. Some of it turning out to be zero. Just can't figure out what I am doing wrong. If you care for some points. Would like to see math examples. Thanks PICC1.ulpr
