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Questions tagged [codesys]

CODESYS is an IDE for application development on programmable logic controllers (PLCs) distributed by the CODESYS Group in Germany. Use this tag only for questions about CODESYS installation and usage as well as related CODESYS software like CODESYS Control Runtime System and CODESYS Automation Server. Use the tags [structured-text], [ladder-logic], and [sfc], for (ide-agnostic) questions about [plc] or [servo] programming.

240 questions
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How to place an instance of a custom Function Block in CoDeSys?

I'm learning CoDeSys (using V3.5 SP2) and I'm stuck with a rather beginner-level problem that I can't seem to find any resources for. I have defined a simple Function Block (by going to Add Object -> POU -> Function Block and using the FBD…
Theodoros Chatzigiannakis
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Pointers and online change in TwinCAT and CoDeSys

Are pointers safe against online change of running PLC program in TwinCAT 2.10 and in CoDeSys 2.3 on which the first one is based? What happens if memory block gets reallocated as part of online program change and there are pointers pointing to that…
Taras Boyko
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Unexpected Functionality in Codesys REAL_TO_STRING

On an IFM CR1203: For most 3-decimal REAL values, REAL_TO_STRING outputs the expected value. For others, it outputs the expected value with '0001' at the end. Why is this happening, and what is a good workaround?
Tyler Braun
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How does IO-Link handle compatibility between different sensor brands and models

I am starting to study the application of IO-Link Sensors in a machine, in this case I will apply several types, such as inductive, optical, flow and pressure, this technology will help me to standardize the types of connections... but well... Once…
dwpessoa
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R_TRIG, F_TRIG and TOF not working correctly

I have VARs declared trigger_pos_sensor_left : BOOL; trigger_ticks : INT := 0; trigger_sensor_rtrig : R_TRIG; trigger_sensor_ftrig : F_TRIG; delay_timer …
user3742046
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Callbacks using methods in CODESYS v3

** TLDR; Is it possible to create pointers to methods, store them and then call them? ** This question is related to this question: how to create pointer to function in codesys v3, but my question is about methods, and, since the referenced question…
Cédric Moers
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REAL / LREAL to String with Scientific Notation Structured Text

I am looking for a way to convert a floating-point value to scientific notaiton string in Beckhoff TwinCAT or codesys. The documentation for their FB_FormatString says this is not currently supported. Does anyone have a "goto" approach for this?
Mark Lazarides
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How to determine the type of a pointer indexed member

How to determine the type of a pointer indexed member. I intend to use： TYPE DUT_DemoStruct : STRUCT Member_1: BOOL; Member_2: INT; END_STRUCT END_TYPE PROGRAM Prg_Main VAR DemoStructPointer: Obj_DemoStruct1:…
Alex Samrt
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TwinCAT Pointer to Pointer of undefined type?

I'm trying to build a function that sums a single dimension array of any type in TwinCAT. I'm relatively inexperienced with pointers so the answer may be obvious, but I could not find any solutions. I read through all these and they helped a…
Gene Parmesan
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Accessing OPC UA ExtensionObject (Struct, Dict and Array) in Codesys

I'm using a Python OPC UA-server (asyncua) to provide data to a CODESYS (V3.5.17.10) program. In CODESYS I'm able to add 'Data Source Manager' and then a 'Data Source' which is the Python OPC UA-server. Now CODESYS connects as client to the server,…
Nando
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Codesys 3 : Return variable address and size from string containing symbol name of said variable?

I want to take a string that contains the symbol name of a variable and somehow get the address and size of the variable with that symbol name. MyDINT:= 5; MySymbolName:= `MyDINT`; VariableInfo:=…
CapinWinky
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How can define enumerator in Methods?

There is a problem when u define an enum in a method. I was trying to do this: VAR enumA:(A,B,C); END_VAR and there is the compiler reaction when I used this in TwinCAT3 Shell (TcXaeShell). any help would be appreciated.
asys
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OPCua Subscribe to specific item / index of array

I have a OPCua server that consists of an array[1000] of objects (4 x reals, 2 x int, 2 x Enumerators). I am trying to subscribe to Object[104].real2 I can subscribe currently to object and receive all 1000 objects every time there is an update. But…
Canadian Wire
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TwinCat3 how to efficiently setup the EventLogger in an OOP?

I'm still very new to OOP and TwinCat so please bear with me. I'm currently developing the software for a small machine that will be used combined with the TF2000 HMI. Because the Event Grid takes away a lot of work I want to set up the TC3…
faultvault
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Trying to get Codesys to run a batch file from the HMI

So currently, I am trying to pick up this code that an intern left off for this project. I have a batch file that is run when clicked, and will execute a powershell script that will convert a generated CSV file from collected data to an Excel file.…
QueenLexi13
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