Post by dat422 on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
Hi, I am also interested to know on how to use the Codesys OPCUA Client to call methods from e.g. a python opcua server.
Last updated: 2025-03-28

Post by nonstop-cat on Problem of assigning physical addresses to variables of type ARRAY OF ARRAY as MW and QW ^{CODESYS Forge talk (Post)}
Array writing method error,,,<arrayname>: ARRAY [<ll1>..<ul1>, <ll2>..<ul2>, <ll3>..<ul3>]</ul3></ll3></ul2></ll2></ul1></ll1> OF <basedatatype></basedatatype></arrayname>
Last updated: 2025-03-31

Post by nonstop-cat on Problem of assigning physical addresses to variables of type ARRAY OF ARRAY as MW and QW ^{CODESYS Forge talk (Post)}
Array writing method error,,,<arrayname>: ARRAY [<ll1>..<ul1>, <ll2>..<ul2>, <ll3>..<ul3>]</ul3></ll3></ul2></ll2></ul1></ll1> OF <basedatatype></basedatatype></arrayname>
Last updated: 2025-03-31

Post by mondinmr on Unexpected behavior in cyclic encoder read method during INT overflow (wrap-around) ^{CODESYS Forge talk (Post)}
Hi everyone, I’m investigating a potential issue with a cyclic method we use for reading incremental encoders in our libraries. I’ve come across two implementations that, at first glance, appear to perform the same operation: motionUnit.vlPositionActualValue is UINT due strange encoder type. Version A METHOD PROTECTED cyclicReadField VAR_INST actPosFieldOld: INT; rI: INT; delta: INT; END_VAR rI := TO_INT(motionUnit.vlPositionActualValue); delta := rI - actPosFieldOld; m_actPosRaw := m_actPosRaw + TO_LREAL(delta); actPosFieldOld := rI; IF settings.velocityFeebackMapped THEN m_actVelRaw := TO_LREAL(motionUnit.velocityActualValue); END_IF Version B METHOD PROTECTED cyclicReadField VAR_INST actPosFieldOld: INT; END_VAR m_actPosRaw := m_actPosRaw + TO_LREAL(TO_INT(motionUnit.vlPositionActualValue) - actPosFieldOld); actPosFieldOld := TO_INT(motionUnit.vlPositionActualValue); IF settings.velocityFeebackMapped THEN m_actVelRaw := TO_LREAL(motionUnit.velocityActualValue); END_IF Both use INT and the same delta logic, so they seem equivalent. However, when an overflow (wrap-around) occurs, version A continues correctly as expected, while version B unexpectedly resets to -32768 without a clear reason. Has anyone experienced similar behavior or can shed light on what might be happening here? It almost seems as if the cast to LREAL is being applied before the calculation — but that would be illogical and potentially very dangerous in many situations! Thanks!
Last updated: 2025-05-13

Post by jschu on Switch visualization style at runtime ^{CODESYS Forge talk (Post)}
Hello , will this be changed in an upcooming version? The current method is to use all the color Variables for buttons and object as changeable variables but the amount of work for this results in a bad cost-benefi ratio.
Last updated: 2025-05-15

Post by durallymax on Making a Visu Element normally invisible and visible if variable is true ^{CODESYS Forge talk (Post)}
You can write any expression that evaluates to TRUE/FALSE in that property, you can also call a method from the property.
Last updated: 2025-06-06

Post by ken-san-sg on Function Block Method call from OPC UA Client ^{CODESYS Forge talk (Post)}
Hello, Is it possible to call mathod which is implemented in Function Block POU from OPC UA client?
Last updated: 2025-07-18

Post by arwie on Use MC_Home without enabling the drive for homing method 35 ^{CODESYS Forge talk (Post)}
So we pay 380€ for SoftMotion licenses for each robot, but have to implement such an obvious use case manually without any hint in the official documentation how to achieve this. This is crazy...
Last updated: 2025-07-31

Post by gseidel on MC_MoveAbsolute: C0138: No matching 'FB_Init' method found for instantiation of SMC_MoveAbsRelPerformerImpl [ERROR] ^{CODESYS Forge talk (Post)}
Hi Imdat, can you please provide the exact version of CODESYS and the compiler version in the project settings? Thanks, Georg
Last updated: 2025-09-08

Post by gseidel on Use MC_Home without enabling the drive for homing method 35 ^{CODESYS Forge talk (Post)}
Hi Artur, as mentioned by imdatatas, homing when not enabled is not supported in SoftMotion. If enabling before homing is not an option, an alternative might be controller based homing using MC_SetPosition. Best regards, Georg
Last updated: 2025-09-08

Post by e13740e on Сalling the context menu from the keyboard ^{CODESYS Forge talk (Post)}
Hello, the request is no longer relevant. Thank you. Working with the Main Menu bar via the Alt key is the most effective method. It has absolutely everything there. Calling the context menu via the keyboard is not necessary.
Last updated: 2025-10-09

Post by e13740e on Сalling the context menu from the keyboard ^{CODESYS Forge talk (Post)}
Hello, the request is no longer relevant. Thank you. Working with the Main Menu bar via the Alt key is the most effective method. It has absolutely everything there. Calling the context menu via the keyboard is not necessary.
Last updated: 2025-10-09

Post by smartcoco on Function block method default arguments ^{CODESYS Forge talk (Post)}
It's not that you missed something, it's that CODESYS doesn't have this feature. I hope CODESYS can add this feature. We also hope to add function overload functionality.
Last updated: 2023-12-22

Post by joanm on Function block method default arguments ^{CODESYS Forge talk (Post)}
The new TwinCAT 4026 will add those default parameters, as TwinCAT drinks from Codesys I guess that will be implemented soon (or maybe, it already is given what tvm says in the previous post).
Last updated: 2024-01-04

Post by tim-roelant on Profinet fault with codesys control V3 - Receive packet error ^{CODESYS Forge talk (Post)}
Hello Tim, We already met via extendsmartcoding.nl, I already bought 2 licences of codesys control. I will try you method, thx for you answer.
Last updated: 2024-02-29

Post by timvh on Error: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
Maybe check: - The library manager, are you maybe missing some libraries - Tools - CODESYS installer: update the CODESYS Visualization and Visualization support - Project - Project environment: maybe you need to update the visualization profile
Last updated: 2025-11-27

Post by unusual-data on C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
you can try to disable "Visualization Manager - Settings - Support client animations and overlay of native elements " selection" It worked for me, thank you.
Last updated: 2025-12-18

Post by mr-ege on Error: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
I have tried these steps, but it still does not work. What should I do? I'm stuck on this error. I cannot design the HMI, I need help.
Last updated: 2025-11-27

Post by adaml on ScriptEngine - execute "Export -> Bootproject and firmware (SD Card)" from python ^{CODESYS Forge talk (Post)}
Hi everybody, recently I was checking how many time consuming manual tasks I can perform with python scripts through ScriptEngine. I have in the project many devices and currently I export bootprojects for them by right clicking on Application, then go Export -> Bootproject and firmware (SD Card) and then point folder where files should be exported. It's fine if project has few devices, but I have some of them with over 30 devices and manual clicking like that is very time consuming. How can I do it with python script? So far I found "create_boot_application" method from Application object (taken by projects.primary.find('Application', True)) but it only generates .app and .crc file instead of full structure to store on SD card (FIRMWARE, USERDATA, SDCARD.INI, Version, Version.txt.sig). Should I use some method to control user interface? Best regards, Adam
Last updated: 2024-07-05

Post by drml on How to implement an interface (IElement)? ^{CODESYS Forge talk (Post)}
I'm struggling with the implementation of the IElement interface (in the ElementCollections library), which I will use to create a SortedList. I created a class (FB) "Device" that implements this interface and that has a "Priority" property that I want to use in order to compare the devices in my implementation of the ElementCompareTo method. Unfortunately, the IElement.ElementCompareTo method needs an IElement as an input, which doesn't know about the "Priority" property of "Device". I tried to define the input itfElement as a Device, but then it doesn't want to compile, because the type in the implementation doesn't match the interface.
Last updated: 2024-07-19

Post by struccc on Release SP20 - Changes in behaviour? ^{CODESYS Forge talk (Post)}
Dear all, I've just started to migrate some of my ancient projects to SP20. There is one strange error (?) I have noticed so far. In a method call, depending on the circumstances I would like to return reference to an object, or an invalid reference: METHOD Add_EVT_OUT : REFERENCE TO FB_MSG VAR END_VAR IF __ISVALIDREF(refMSG_Entry) THEN Add_EVT_OUT REF= MANAGER.AddMsg_EVT_OUT( refMSG_Entry, _Get_EVT_Message(MSG_EVENT.OUT), _Get_EVT_AddCode(MSG_EVENT.OUT) )^; ELSE Add_EVT_OUT := 0; END_IF So far setting a reference variable to 0, did this. But now, the expression Add_EVT_OUT := 0; gives an error: [ERROR] DB_WTP_370: Add_EVT_ACK MSG_TRIGGER_EXT: C0032: Cannot convert type 'BIT' to type 'REFERENCE TO FB_MSG' Naturally... I can write: Add_EVT_OUT := DWORD#0; But is this the correct way? Is there any constant I could use instead, like "NULL"? Or this is totally wrong and to be avoided?
Last updated: 2024-03-24

Post by mr-ege on Error: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
Hi all! I'm trying to learn PLC Programing. Today I was making a simple PLC program, as you can see. When I compile the program without the visualization, there are no errors. However, when I add the visualization and then compile it, I get this error. I don’t know how to solve the problem. I have tried the following solutions: rebooting the PC and updating the software. Error Code: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr Compile complete -- 1 errors, 0 warnings Build complete -- 1 errors, 0 warnings : No download possible Version: CODESYS V3.5 SP21 Patch 3
Last updated: 2025-11-25

Post by imdatatas on Error: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
Unfortunately, the "C0138: No matching 'FB_Init" method found" error is a nightmare for CODESYS V3.5 SP21. I'm not sure if anything has been done about this or if anything will be fixed. I've encountered the same issue many times, and it was only resolved by completely uninstalling SP21, deleting all related files and folders from my computer, and then installing SP19. So, I've given up on using SP21 and switched back to SP19patch7. Here are some previous posts regarding the "C0138: No matching 'FB_Init" on SP21 of Codesys. https://forge.codesys.com/forge/talk/Visualization/thread/0763d6ca8e/ https://forge.codesys.com/forge/talk/Motion/thread/9074005bf4/
Last updated: 2025-11-28

Post by rmaas on Responsive Design Example ^{CODESYS Forge talk (Post)}
Hi, I just tried the example project with control WIN x64 and for me this is working correct. The only difference is that it is showing 'TabletPortrait' when i hold my smartphone in portrait mode and 'Monitor' when i hold my smartphone in landscape mode. This is because smartphone resolutions have increased i guess... You could check what resoution is detected and change accordingly in IsSmartphone method.
Last updated: 2024-07-04

Post by ahuckphin on Issues with Modbus Slave with Raspberry Pi ^{CODESYS Forge talk (Post)}
codesyscontrol_user.cfg [SysCom] Linux.Devicefile.1 = /dev/ttyUSB0 portnum:=COM.SysCom.SYS_COMPORT1; **parameters are used in the python-script ** method: "rtu" port: "COM8" baudrate: 9600 stopbits: 1 bytesize: 8 parity: 'N' timeout: 1 register address for humidity: 0x000 register address for temperature: 0x001 unit ID: 1 **parameteized in the modbus-master-comport ** see attached files
Last updated: 2024-07-11

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