Post by timvh on VisuElems.CurrentUserGroupId is not stable ^{CODESYS Forge talk (Post)}
I'm not sure what you are trying to do, but getting the CurrentUserGroupID like this will not work, because there could be multiple Visualization Clients and each can have a different user that is logged in. Also when you go online with CODESYS and open an Visualization, this is counted as a client. Probably this is the reason you see it changing. What you can to is "iterate" over all clients and then see which user is logged in on which visualization Client. For this you need to add the Visu Utils library to the project and call the FbIterateClients. See https://content.helpme-codesys.com/en/libs/Visu%20Utils/4.4.0.0/VisuUtils/VisuActionUtilities/Function-Blocks/FbIterateClients.html fbClientIteration( xExecute := x_Execute, itfClientFilter := VU.Globals.AllClients, itfIterationCallback := fbIterator, xDone => x_Done, xBusy => x_Busy, xError => x_Error, eError => e_Error); The fbIterator, in the example above, should be an instance of an FB which you have created yourself and this must implement VU.IVisualizationClientIteration. For example: FUNCTION_BLOCK FB_ITERATOR IMPLEMENTS VU.IVisualizationClientIteration Then automatically the corresponding methods will be called. In the HandleClient Method, you will get an interface to the client(s) and then you can get the current user through this interface: itfClient.UserGroupId You can also get the UserName: itfClient.UserName
Last updated: 2023-11-14

Post by mp9876 on Problem using MeasureFrequence FB ^{CODESYS Forge talk (Post)}
Hi everyone, new at Codesys and PLC programming in general. I am using Codesys Win V3.5 SP20 I would like to measure an encoder's frequency output (obtaining that pulse train from Factory IO) and intended to use the MeasureFrequence FB (Intern/CAA/Utilities/CAA Mathematics/3.5.19.0). As mentioned in the title what I need to measure is low frequency, such as lower than 40hz (a cycle every 25mS) or so; I could even go lower frequency if required as this is for test purposes) therefore I am not expecting problem measuring a low frequency with that FB The library in question appears to be installed as I can retrieve it from the Library Repository. I can also see it from the Device's Library Manager. Problem arises when I am trying to instantiate this particular FB. I go like this: VAR MeasF:MeasureFrequence; END_VAR Please note that as soon as I start typing the "MeasureFrequence", the MeasureFrequence comes out as a viable option in auto-typing; seems to indicate that the FB is recognized somehow. But there is no way I can compile this as it comes back with the following: C0046: Identifier 'MeasureFrequence' not defined. Tried to rename that to ABC instead of MeasF; same issue. Possibly that the library is not properly installed ? Placeholder ? I would greatly appreciate a bit of guidance if possible. Thank you and regards, Mike
Last updated: 2024-06-24

Post by jari-koivuluoma on JSON_Utilities_SL JSONFileWriter error NULL_POINTER ^{CODESYS Forge talk (Post)}
FB jsonFileWriter gives a NULL_POINTER error, why? JSONByteArrayWriter works fine so the JSONData FB should be fine. The device is CODESYS Control Win V3 x64 in simulation mode. Codesys version is V3.5 SP16 Patch 5 JSON_Utilities_SL version is 1.3.0.0 Src: ST_TestStruct1a; TXT: WSTRING(10000); MakeJSON : BOOL := TRUE; SrcJSONData: JSON.JSONData; jsonFileWriter : JSON.JSONFileWriter; IF MakeJSON THEN MakeJSON := FALSE; // Struct data to JSONData FB F_TestStructToJSON(ADR(Src),ADR(SrcJSONData)); // Writing to file jsonFileWriter( xExecute := TRUE, sFileName := 'c:\JSONTEST\JSON.txt', eEncoding := JSON.Encoding.UTF_16, xAsyncMode := TRUE, jsonData := SrcJSONData ); // Waiting to finish WHILE jsonFileWriter.xBusy DO ; END_WHILE // To text jsonArrayWriter( xExecute := TRUE, pwData := ADR(TXT), udiSize := SIZEOF(TXT), jsonData := SrcJSONData, xAsyncMode := FALSE, ); END_IF
Last updated: 2023-09-08

Post by matthew on New Ladder Diagram conversion does not work due to missing features ^{CODESYS Forge talk (Post)}
Hi It looks like in the new ladder there is no way to remove unused FB call parameters or update the function block? It's quite often where you have a function block with multiple uses and not all the parameters are required. Need the ability to leave an input/output blank without getting an compile error Expression expected instead of '' Also double clicking on the FB no longer opens the underlying FB code and view what it was doing online. Dragging and dropping a variable does not work, only using the selection works. Will these be available in the V1.0 release or just best to stick to the old ladder until it's available? Thanks
Last updated: 2024-01-28

Post by alexgooi on Function Blocks and arrays of function blocks ^{CODESYS Forge talk (Post)}
Hi Jack, I think you have to look at a FB in a different way. A Function block (Class) can contain its own data. In other words don't define loose data in your GVL, but define a instance of a FB (Object) in your GVL: Example: Function_Block Basic_Class VAR_INPUT Open_Command: BOOL; END_VAR VAR_OUTPUT Opened: BOOL; END_VAR if Open_Command then Opened := TRUE; ELSE Opened := FALSE; END_IF Global Variables Objects: ARRAY[1..100] OF Basic_Class; //Here you ar defining you objects END_VAR In your code you can directly acces the data and couple it to the IO: GVL.Objects[1].Open_Command := %IX0.0; %QX0.0 := GVL.Objects[1].Opened; //To call the code itself use: GVL.Objects[1](); If you want to take this a step further you are also able to add methods and properties to the FB/Class end thereby creating a OOIP program
Last updated: 2024-02-15

Post by timvh on No source code available for this object ^{CODESYS Forge talk (Post)}
The message means that you (CODESYS) tries to open the function block, but this is not possible because the library which contains the FB is compiled. You either get this when you try to manually open the function block (while editing the application), but it could also happen that an exception occurs in the running application and CODESYS tries to show the location where it occured. If it happened in an FB of the compiled library, it cannot show this and you could get this message too.
Last updated: 2024-07-16

Post by mubeta on Some 'pathetic' errors in SoftMotion program ^{CODESYS Forge talk (Post)}
Yes, this point is part of my misunderstanding. Why, after the execution ot the motion FBs is set to FALSE and exsecuted at lest one time, it must be continuosly called, even if the motion control it's take from another subsequent instruction. This is what I really don't undertand, but what in fact it's happening. For example, in case of stopping a MoveVelocity FB, then Halting the motion by the related FB, the axis at spot goes into error. If there was bad trigger management, the various instructions would NEVER work.
Last updated: 2024-07-18

Post by mikek10 on Some 'pathetic' errors in SoftMotion program ^{CODESYS Forge talk (Post)}
I was answering your last paragraph Meanwhile, I would like to understand why the motion FB instances must still be called even after the Execute is set to FALSE, especially in view of the fact that the next instruction is programmed to abort the previous one, with BufferMode set to 'Aborting'. All these unnecessary FB calls are an unnecessary overhead on the CPU anyway. Is there any precise rule about when to cease calling the various instances? (It should precisely be the 'done' status that says this one has finished its work).
Last updated: 2024-07-18

Post by andrebrandt on FB string and naming ^{CODESYS Forge talk (Post)}
Hi all. I have a FB written in ST. FUNCTION_BLOCK NTC10k VAR_INPUT Syst:STRING; In:REAL; END_VAR VAR_OUTPUT Out:REAL; OTag:STRING; Out_St:Struct_NTC10K; END_VAR VAR Tag:STRING; InstanceName: STRING; Structure:Struct_NTC10K; END_VAR What i'm trying to do, is to pass data to structure. In structure i want to add a tag with systemnumber and sensorname. '320.001-RT401' In pou i use this RT401: NTC10k;, and tried this RT401: NTC10k(Tag:='RT401'); Anyone done this?
Last updated: 2024-09-26

Post by ph0010421 on Task time too fast? ^{CODESYS Forge talk (Post)}
Hello I've made an FB which is a TCP server. It uses the excellent CAA NetServices library. If I have the FB in a task <4ms, then the RT crashes immediately at boot up. If the task >=4ms, it starts and runs perfectly. This is even if the block is not doing anything; just instantiated. Am I missing something silly? Why would a low task time cause this? 4ms is perfectly adequate, but I'm just interested why... thanks PH
Last updated: 2024-11-27

Post by nz-dave on ethercat softmotion axis error ^{CODESYS Forge talk (Post)}
Hi all I'm having a little trouble get my axis to work. i can turn them off and on. i can run each servo manually inputting directly to the mapping address. as soon as i try to use any FB's like jog etc my servos wont move and error out. so far I've had error "SMC_ERROR.SMC_DI-POSITIONLAGERROR" and another one about not calling a fb. cheers. in the attachment I have just jogged X_Axis with the MC_JOG FB
Last updated: 2025-03-10

Post by hismoon on Inheritence of struct, ^{CODESYS Forge talk (Post)}
Using a UNION instead of a STRUCT alone should give you that flexibility and only occupy memory once. And if you want to be really elegant, you could use an FB, which only holds PUBLIC VAR. Because a POU can use "EXTENDS"/inheritance. In CODESYS V3, an FB has a lot in common with C++ classes. Using ANY or ALIAS is rarely a good idea. It neither won't be pretty, nor have good readability and requires you to create a lot of error-prone things around it.
Last updated: 2025-03-14

Post by gepert on GearInPos ^{CODESYS Forge talk (Post)}
Hello, Please give any tips regarding stopping Mc_GearInPos block. Please look at attached drawings. When fb MC_GearInPos is started, output "busy" is true - it is ok. But when i want to stop this funkction blok i deactive execute input and i use Mc_stop. Unfortunelly Mc_gearInPos is still busy. It lasts till to synchronize phase. Then i can stop it by Mc_stop. So I cannot stop fb before synchrnization. Can you give any tips how solve this problem. Sometimes I must to switch off before synchro. Best regards Lukasz
Last updated: 2025-08-07

Post by aniket-b on Multiple function blocks are not executing at the same time in ladder logic ^{CODESYS Forge talk (Post)}
I have two ethernet Ip drives and created Function Blocks for different motions tasks. I am using same FB for both the drives. When I try to execute the relative move start command on FB for both the drives it is not working. However, if I add 1ms second delay between the execution of each drive it is working. Also when I change the rung order it is working for the first drive in the rung. what could be the wrong here?
Last updated: 2024-03-12

Post by hoatran on Use third party actuator with IO-Link Master (IFM) ^{CODESYS Forge talk (Post)}
The generic sensor FB is for controlling the sensor via its cyclic input (PDI) and output (PDO). In this case, ifm raw cyclic input and output data are WORDs (16 bits total) The PDO data from the Buerkert unit are SINT (8 bits) In this case, I would use the unpackword fb from the CAA memory library to unpack the valve feed back value into the appropriate location.
Last updated: 2024-04-23

Post by fless on FB having single input but initialized with Array ^{CODESYS Forge talk (Post)}
Why will it retain the sum value from the last call? This is how PLC work. Usually variables only get initialized after a download or a reset (i.e. power loss). RETAIN variables are saved in a special kind of RAM and keep their value after a power loss. To initialize variables on every call of your FB use the VAR TEMP block. VAR_TEMP sum : INT; END_VAR
Last updated: 2024-05-07

Post by kenth1973 on MC_Phasing state explenation ^{CODESYS Forge talk (Post)}
My MC_Phasing FB was stuck in iPhasingState=1 and error output HIGH on one axis. I could manually overwrite the state to 0 in the instance data. During normal run I see the state change from 0 to 10 to 100 back to 0 (maybe more states that I couldnt catch with the naked eye) But - what are the states numbers and their different explenations? This is not explained in the FB guide on codesys. (the pictures show state = 0 after I reset)
Last updated: 5 days ago

Post by jeroenaero on Targetvisualisation full screen with CmpTargetVisu settings ^{CODESYS Forge talk (Post)}
Hi, How can i display targetvisualization in full screen on the target device? I installed Targetvisu For Linux SL 4.16.0.0 on target device which contains Raspberry PI 64bit PIXEL desktop. When i connect my PLC program to the remote targetvisu, the targetvisu displays for 60% horizontally. We contacted CODESYS and they said it is a bug. they had a workaround, and with the settings below added to the file /etc/codesysvisualization/CODESYSVisualizationTV.cfg, the targetvisualization display for 100%, but with the taskbar at the top. VisuClient.BestFit=1 ;VisuClient.ScaleTypeIsotropic=0 VisuClient.FillWholeBackground=1 [CmpTargetVisu] WindowPositionX=0 WindowPositionY=0 WindowSizeWidth=1280 WindowSizeHeight=800 WindowType=2 How can we let it display fullscreen without taskbar?
Last updated: 2025-07-24

Post by hafizapik99 on Webvisu not showing Codesys V3.5 SP13 Patch 4 ^{CODESYS Forge talk (Post)}
Hello, I am using a Hitachi Micro EHV+ for a small project, and I wanted to have a Web visu, done with Codesys V3.5 SP13 Patch 2. I test the Visu screen and it works well in Codesys, but I get a blank page when i enter the web visu in a browser. Here is the setting under web visualization: Update rate (ms): 5000 (previously set to 2500 also not working) Default communication size: 100000 (previously set to 50000 also not working) Under Visu_Task tab: Priority: 3 The Visu_Task interval is set to 2500ms (previously set to 200ms also not working) I'm using Google chrome with the latest update, the Javascript is enabled with HTML5. Any advice?
Last updated: 2024-04-06

Post by hafizapik99 on Webvisu not showing Codesys V3.5 SP13 Patch 2. ^{CODESYS Forge talk (Post)}
Hello, I am using a Hitachi Micro EHV+ for a small project, and I wanted to have a Web visu, done with Codesys V3.5 SP13 Patch 2. I test the Visu screen and it works well in Codesys, but I get a blank page when i enter the web visu in a browser. Here is the setting under web visualization: Update rate (ms): 5000 Default communication size: 100000 Under Visu_Task tab: Priority: 3 The Visu_Task interval is set to 2500ms I'm using Google chrome with the latest update, the Javascript is enabled with HTML5. Any advice?
Last updated: 2024-04-06

Post by deeps on web visu on IFM ^{CODESYS Forge talk (Post)}
I have an IFM cr1077 display. I would like to show B&R mapp view on IFM visualization. I used coedsys web browser elemnt for this. I could see IFM working fine in Internet web browser but IFM device shows white screen and freezes. I think there is problem with IFM showing the web browser. Is my understanding of the web visu right? am I doing any mistake here?
Last updated: 2023-08-18

Post by jeffg on License issue with visu tags ^{CODESYS Forge talk (Post)}
I seem to be having a problem with the license on ver 3.5.19 patch 5 The runtime keeps going into demo mode but it wont tell me the reason I looked at the license software metrics and the visu doesn't appear to be working I attached screen shots of the metrics screen and the license dongle that is plugged in to the windows PC Anyone have any ideas on how to fix this
Last updated: 2024-06-28

Post by dkugler on TargetVisu Freezing ^{CODESYS Forge talk (Post)}
The only weird situation i remeber with particular or complete frozen target visu was after the rtc clock was fallen or set back to the past. It looked like after running a while the alarm history database crashed during writing entries at a date lot of years in the past. After setting the rtc clock to actual date/time and deleting the alarm db every thing worked fine. I don't know, if this is/was a problem of our PLC hardware/firmware? Maybe check date/time at your system?
Last updated: 2024-09-13

Post by jddaigle on TargetVisu controls are incorrectly positioned ^{CODESYS Forge talk (Post)}
Hello, I'm trying to run TargetVisu on my Linux IPC, and while it does work, the controls are misaligned compared to my WebVisu. Both visualizations are full-screen on a Debian 12 VM with a resolution of 1280x768. The WebVisu is running in Firefox. Are there any configuration I should adjust to ensure the controls align properly between the two? Any guidance or troubleshooting tips would be greatly appreciated! Thank you.
Last updated: 2024-11-03

Post by durallymax on Access Variable Visu Dialog ^{CODESYS Forge talk (Post)}
Is there a way to access the variable in the called dialog? Example: Text Field element with PLC_PRG.myVar as Text variable. OnMouseClick configured to write variable with keypad pop-up. OnValueChanged configured to Execute ST RND(PLC_PRG.myVar,2); Rather than change myVar with each copy of this Text Field, is there a way to access whatever the configured text variable is? Generally try to stay away from ST in visu, but was curious regardless.
Last updated: 2024-11-14

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