Post by trusty-squire on Confused by dwIpoTime input for SMC_Interpolator ^{CODESYS Forge talk (Post)}
OK, that makes sense. Because the FB is provided a specific interval period, it would change the target position accordingly based on the time it "thought" elapsed. If it has the wrong interval provided, it updates the target positions every cycle incorrectly so the axes will end up moving faster or slower. Thanks!
Last updated: 2024-07-22

Post by daqe102 on HTTP CLIENT (MAX SIZE) ^{CODESYS Forge talk (Post)}
Hi everybody I'm Paul and I need your knowledge, I am trying to send a huge Json (about 60,000 characters) through http client FB from codesys, however I saw that Maximum size of the http request in btyes are 16000, So, is there any way to resolve this situation? is it posible or there's a another opction to do it?
Last updated: 2024-08-21

Post by timvh on FB string and naming ^{CODESYS Forge talk (Post)}
Really not clear what you are trying to do, but isn't a Struct enough? So add an object of the type DUT to the Application. Then create a structure TYPE ST_Sensor : STRUCT sName : STRING; uiNumber : UINT; END_STRUCT END_TYPE Then in you application add an instance of this Structure stSensor1 : ST_Sensor := (sName := 'my sensor', uiNumber := 1); or use it like this stSensor1.sName := 'my sensor';
Last updated: 2024-09-28

Post by jarnok on How to know if output if function block is used ^{CODESYS Forge talk (Post)}
Hi, Is it possible to know of an output of a function block is used? I've found there is a way to find unused inputs of a fb, through the attribute: is_connected. But I'm wondering if the same can be done for an output. Thanks in advance!
Last updated: 2024-10-15

Post by pascaljt on Warning code C0373 ^{CODESYS Forge talk (Post)}
Hello, I wrote a function block for a controller but I have a warning code C0373 "expression or part of it has no effect" and the sub routine which contain my function block is underlined in blue. Despite, the FB works perfectly. Do you know why I have this warning ? Thanks. Pascal.
Last updated: 2024-10-30

Post by trusty-squire on Strange problem with the ‘MC_SetPosition’ function ^{CODESYS Forge talk (Post)}
Just a stab in the dark, but you might want to check the Dynamic Limits (accel, decel, velocity, jerk) in the Codesys SoftMotion device configuration, as well as checking similar limits on your servo drive? Are you seeing any errors, or does the MC_SetPosition FB get marked as complete?
Last updated: 2025-01-09

Post by kevinm on Attaching Trace variable to Frame Configuration Variable ^{CODESYS Forge talk (Post)}
Is it possible to show a variable from a Frame Configuration in a Trace on that Visualization? I want to pass the FB for an AXIS_REF_ETC_SoE_Standard to the visualization and display live axis data in the visualization. However, I cannot find a way to use a Frame Configuration variable in the Trace Configuration dialog.
Last updated: 2025-04-04

Post by ustad41 on Cam Blending ^{CODESYS Forge talk (Post)}
Hi everybody, I want to execute more than once cam fb simultaneously so blending cam and thus blending velocity without stop motion. But as far I know codesys dont support directly cam blending. But I beleeive there is a some solving. I request your support. But there is important thing is I want to change cam table cam on the fly. For example FlyingSaw application change cutting lenght.
Last updated: 2025-08-01

Post by r0udy on Adress problem ^{CODESYS Forge talk (Post)}
Hi, I 've just started a new project. Translating SoMachine (SCHNEIDER) to CODESYS 3.5.18//DEMO (EATON XC303) I succeed (I think so) to copy FB, STRUCT,... and I also integrated old library. When I build F11, I have a first problem : - Adress out of rang - Overlay It's strange, usually %ML100 > %MB800 Here ONLINE: %ML100 > %MB100 !! I don't understand why ? And idea ? Thanks
Last updated: 2025-08-06

Post by gseidel on Dynamic target position tracking ^{CODESYS Forge talk (Post)}
Hi kporter, a more direct way would be to use SMC_FollowPosition to write the set positions directly to the servo drive. This FB has reacts on changes of the fSetPosition on each call, without a need for a rising edge on Execute. See https://content.helpme-codesys.com/en/libs/SM3_Basic/Current/SM3_Basic/POUs/Movement/Direct/SMC_FollowPosition.html. Best regards, Georg
Last updated: 2025-09-08

Post by aniket-b on How to protect library project? ^{CODESYS Forge talk (Post)}
I have library projects which has few function blocks. I have assigned security to each FB. I want to protect them and user can only be able to use it without viewing the code inside. What kind of file I should send to user? Is it compiled library file?
Last updated: 2024-01-22

Post by rmaas on Direct Pointers in IOMapping for EtherCAT with IoDrvEthercatLib.ETCSlave_Dia ^{CODESYS Forge talk (Post)}
Hi, Im not sure if this is what you mean, but i do succesfully use the IoDrvEthercatLib.ETCSlave.InputData and IoDrvEthercatLib.ETCSlave.OutputData to read from and write to beckhoff DI and DO cards. Very convenient as you can make an FB with an VAR_IN_OUT of type IoDrvEthercatLib.ETCSlave and only have to pass the slave reference... So i am not using .ETCSlave_Diag but .ETCSlave...
Last updated: 2024-02-13

Post by xabier on No work Control Torque Codesys with Drivers M751 Control Techniques ^{CODESYS Forge talk (Post)}
I have a Control Techniques M751 driver that I'm controlling with a codesys-based PLC.... I want to implement a rate-limiting torque control. How could I do it??.. Is there any FB from codesys that allows me to do it?? Thank you
Last updated: 2024-03-13

Post by xabier on No work Control Torque Codesys with Drivers M751 Control Techniques ^{CODESYS Forge talk (Post)}
I have a Control Techniques M751 driver that I'm controlling with a codesys-based PLC.... I want to implement a rate-limiting torque control. How could I do it??.. Is there any FB from codesys that allows me to do it?? Thank you
Last updated: 2024-03-13

Post by timvh on Change the Opening Position of the Dialog using VU.FbOpenDialog ^{CODESYS Forge talk (Post)}
Probably best to call the FB continuously. So something like this could solve it: IF xOpenLatchSettingDialog THEN xOpenLatchSettingDialog := FALSE; fbOpenLatchSettingsDialog.xExecute := TRUE; END_IF IF fbOpenLatchSettingsDialog.xDone OR fbOpenLatchSettingsDialog.xError THEN fbOpenLatchSettingsDialog.xExecute := FALSE; END_IF TopLeftDialog.iX := 100; TopLeftDialog.iY := 23; fbOpenLatchSettingsDialog( itfClientFilter:= VU.Globals.OnlyTargetVisu, sDialogName:= 'visu_AlarmLatchSettings', xModal:= TRUE, pTopLeftPosition:= ADR(TopLeftDialog) );
Last updated: 2024-05-09

Post by matthew on New Ladder Diagram conversion does not work due to missing features ^{CODESYS Forge talk (Post)}
Hi @eschwellinger Just wondering if there is any update when the Expression or part of it has no effect will be fixed? Also have the ability to open an FB when online and offline. It would also be great to be able to view the ST code block when online.
Last updated: 2024-05-14

Post by osande on Trend/trace data ^{CODESYS Forge talk (Post)}
Ok, the problem is that the trend/trace system can't read function block instance data. The variables has to be stored directly under the program calling the FBs. Thus, FB variables to be trended/traced must be connected to variables declared in the program. Seems like a bug to me!
Last updated: 2026-03-13

Post by reinier-geers on API webclient ^{CODESYS Forge talk (Post)}
Fur ein jahr ein webclient lisence gekauft. Aber immer funktioniert es noch nich. Mach ik es auf internet bekomme ich daten. Aber mit codesys bekomme ich - Query fehler ... - ein switch die abschalt - oder den controller hangt mal wieder Hat eine dar erfahrung? Kan ich in den FB sehen was da pasiert ?
Last updated: 2026-04-05

Post by grant32 on RAMP_REAL FB is retaining my output value when i try to re use the FB ^{CODESYS Forge talk (Post)}
Hello, I'm relatively new to PLC programming. I am trying to creat a ramp down function, I have an example here of what I am using. I can get the function to work, the issue is that the OUT (variable3) value is being held by the FB so after I use it once it no longer works. In this example i set variable3 to 100 and the rest is as seen, over the course of a minute it ramped down to 10 (as desired). But when I deenergize TEST_START, set variable3 back to 100, and then re-energize TEST_START it immediately jumps back to the previously held value 10. The reset on this block just pauses the function and holds the last OUT. In my case I will need the function to start OUT at a set value, ramp down to the IN (variable2) value, and then accept a new OUT value to ramp down next time the block is energized. Hopefully this made sense, if anyone has any advice that would be awesome!
Last updated: 2024-07-29

Post by kunz on Profinet Device keeps abort connection with AR alarm.ind(err) ^{CODESYS Forge talk (Post)}
Can somebody explain what the error Connection aborted: AR alarm.ind(err) exactly mean? I have the same Problem and dont know how to solve the issue
Last updated: 2023-08-21

Post by eschwellinger on CSVReaderInit returns error : INVALID_HANDLE ^{CODESYS Forge talk (Post)}
this is a security issue not to read/write in the plc allowed path I would recommend to update and change the path in the application were the files are😏
Last updated: 2023-08-30

Post by roundex on CSVReaderInit returns error : INVALID_HANDLE ^{CODESYS Forge talk (Post)}
Could you please give me an example where to select new path in plc. Right now my csv files are placed into /home/user/csvfiles
Last updated: 2023-08-30

Post by totorovic on CSVReaderInit returns error : INVALID_HANDLE ^{CODESYS Forge talk (Post)}
Thank you for the return. The path targets to a CFast card. User has R/W access to it. We will try to change it.
Last updated: 2023-08-31

Post by marekxc on Error C0521 - unknow compiler ^{CODESYS Forge talk (Post)}
Select in tree "DEVICE", right-click and select "Update Device" Select "Library manager" and Change the version of the Library (down manualy). Samoetimes "Try reload Library". If you open a project version 3.5.19 in version 3.5.16, there are difficulties.
Last updated: 2023-09-02

Post by nyee on Project compiling error in Simulation mode ^{CODESYS Forge talk (Post)}
Hi, I have a similar issue - we have been using codesys V3.5.16.20 Do you have any suggestions or confirmation that this will work with a different version of codesys and Pi extension
Last updated: 2023-09-07

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