Post by talhaali on Adding a variable from text list into ST code ^{CODESYS Forge talk (Post)}
Hi, can I use a entry of a text list as variable in structured text? for example in attach picture, if i use want to use data of first row. I am trying to write: A : STRING := TextList.Default.0; but it is not workings
Last updated: 2023-12-07

Post by talhaali on Adding a variable from text list into ST code ^{CODESYS Forge talk (Post)}
Hi, can I use a entry of a text list as variable in structured text? for example in attach picture, if i want to use data of first row. I am trying to write: A : STRING := TextList.Default.0; but it is not workings
Last updated: 2023-12-07

Post by dkugler on Converting hex bytes to float ^{CODESYS Forge talk (Post)}
have a look at UNIONs. With a union you are able to write single bytes to the same adress area which belongs to a float variable at the same time. I like to do a lot of convertions belonging to interfaces and fieldbus in this way, f.eg. word / byte swapping etc.
Last updated: 2024-08-06

Post by timvh on Configuring a 2's compliment ^{CODESYS Forge talk (Post)}
You could create a DUT of the Type Union and add an array of 2 bytes + an Int. Then write the byte values in the array of the Union and read the Int. Or VAR iInt : INT; byHigh : BYTE := 2#1111_1111; byLow : BYTE := 2#1111_1111; END_VAR iInt := TO_INT(byHigh*16#100 + byLow);
Last updated: 2024-09-28

Post by hemuv on Open Numpad with VU.FbOpenDialogExtended ^{CODESYS Forge talk (Post)}
Hello Barton, I try to log the changes in Numpad (upon Ok button pressed) that an Element name/Element text variable is changed from so to so. How to get the Element name (or text fields Text Variable) from where the Numpad is called? Numpad is Invoked from Inputconfiguration->onMouseDown->Write a variable. Thanks
Last updated: 2024-11-07

Post by wayne-riesterer on Assignment Efficiency - Repetitive Assignment vs IF statement ^{CODESYS Forge talk (Post)}
Thanks for your responses. I like to write the leanest possible code that I can because it makes it much easier to read/maintain/debug. OR_ELSE is what I was looking for. I wasn't sure if CodeSys short-circuited evaluation and I didn't realize this operator existed. Thanks!
Last updated: 2025-03-08

Post by wbj0t on one variable signed to modbus tcp server device and modbus serial device ^{CODESYS Forge talk (Post)}
Hi. Raspberry pi 4 runtime. Runtime version 4.16, IDE version 3.5.21. Is it possible write new value for variable via modbus tcp or serial devices when both enabled? As I see - not. What can I do? It is terrible restriction.
Last updated: 2025-07-17

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 dogulas on numeric text box control ^{CODESYS Forge talk (Post)}
Ok, this is how I made a numeric text field: use a Text Field properties -> Texts -> Text := %f (or %d or whatever you need) properties -> Text variables -> Text variable := (your numeric variable) properties -> Input configuration -> OnMouseDown -> Configure: Write Variable Input type := VisuDialogs.Numpad Use another variable (your numeric variable) Min val Max val etc. Please tell me there is an easier way to do this.
Last updated: 2025-10-02

Post by snhatton on How to write a for loop in ladder? ^{CODESYS Forge talk (Post)}
Hi there, little late to the party, but you could also use the ST block for in-line ST code and implement a for loop as you normally would. ST Block is super handy if you just need a small amount of in-line structured text code without creating a new POU. Hope this helps!
Last updated: 2025-10-06

Post by nz-dave on Bool turning on in case stament in wrong state? ^{CODESYS Forge talk (Post)}
pretty sure its not. ive done a cross reference and only have one write that sets it to true. Only way i can stop it is to remove the function block call from the main pou that is running said case. its got me stumped:/
Last updated: 2023-12-16

Post by ph0010421 on TCP/IP client ^{CODESYS Forge talk (Post)}
Hello TCIS_Send needs to be longer than 4 bytes because idata is 28 bytes long. There may be other ways, but I would make a UNION with string/array of bytes. Write your STRING into the AsString part then copy the AsBytes part into TCIS_Send (Elements [3] to [30]) then 252 would be in [31] (I've assumed the idata is always the same length)
Last updated: 2023-12-19

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 reinier-geers on SysFileOpen does not work after update to V3.5 SP19 Patch 5 ^{CODESYS Forge talk (Post)}
At 19.1 the hFile_test should be RTS_IEC_HANDLE and always open-write - close in one cycle udi_handle: RTS_IEC_HANDLE; //handle-number. Is created by SysFileOpen udi_handle:=SysFileOpen(sFileName,Sysfile.AM_WRITE_PLUS, ADR(udi_ErrorCode)); udi_RetValWrite:=SysFileWrite(udi_handle, pRemBuffer, szRemBufSize, ADR(udi_ErrorCode)); //closing file IF udi_RetValWrite < szRemBufSize THEN ui_Error:=cWriteError; END_IF//error writing data udi_ErrorCode_Close:=SysFileClose(udi_handle);
Last updated: 2024-02-19

Post by timvh on Limiting Memory Access of an Array to Within its Bounds ^{CODESYS Forge talk (Post)}
Add the object "POU for Implicit Checks" to your application, then select "Bounds check". This will create a function which is automatically called each time an array is write accessed. In the function you can handle "out of bounds" situations. By default it will be limited to its lower or upper bound.
Last updated: 2024-03-06

Post by stuartjr on Disabling forcing of specific variables ^{CODESYS Forge talk (Post)}
I also thought that if I had logic writing a value to this variable, then it would override the force anyway, since I thought that the force request was only applied at the beginning and end of the PLC scan. But this doesn't seem to be the case, the force persists throughout the logic regardless of what I write to the variable with logic
Last updated: 2024-03-15

Post by riku on Download CODESYS Scripting package ^{CODESYS Forge talk (Post)}
Hey there! Is it possible to download the "CODESYS Scripting" package outside of the "CODESYS Installer"? Or is there a alternative way to download the python files for the scripting engine? I want to setup a test environment to write test scripts and therefore want to have those python scripts for e.g. autocompletion. Thanks in advance!
Last updated: 2024-03-16

Post by talhaali on Data logging from codesys to Microsoft Access ^{CODESYS Forge talk (Post)}
Hi, I want to write data from Codesys to Microsoft access and want to save it as mdb file. There is a way to store data in excel(CSV) file but instead of this, I want to save data in access (mdb) file. Does anyone have a solution? Thanks
Last updated: 2024-04-04

Post by talhaali on Data logging from codesys to Microsoft Access ^{CODESYS Forge talk (Post)}
Hi, I want to write data from Codesys to Microsoft access and want to save it as mdb file. There is a way to store data in excel(CSV) file but instead of this, I want to save data in access (mdb) file. Does anyone have a solution? Thanks
Last updated: 2024-04-04

Post by fabmorlino on Codesys v3.5 SP11 and Python scripts ^{CODESYS Forge talk (Post)}
Hi, I'm using codesys from a while, but I 'm not able to write phyton scripts. I whould like generate a PC txt file with the content of specific GVL codesys table, or better for my scope: a txt file from a STRUCT defined in CODESYS project. Any kind man could help me with some clue? Thanks Fabrizio
Last updated: 2024-04-05

Post by mgengler on Recipe Manager - Not Creating Recipe Files ^{CODESYS Forge talk (Post)}
Thanks for info... However, I changed the directory to: C:\ProgramData\CODESYS\CODESYSControlWinV3x64\58719825\PlcLogic\Recipes It still displays the content of this folder OK, however still will not write or read files. Is this the PLCLogic area you speak of? I also tried adding this path the the CodesysControl.cfg file. But still can't get it to work. Any additional direction would be appreciated!
Last updated: 2024-05-20

Post by gatto on variables between two applications ^{CODESYS Forge talk (Post)}
No. As you can see in the uploaded image, in my test project, I have a variable list GVL_1 which is located in appication_1. But if I write in POU_2, which is instead found in application 2, I cannot find the variables of GVL_1. it seems that the GVLs are children of each app
Last updated: 2024-06-24

Post by kalmeyer on STEPPER CODESYS SOFTMOTION_DRIVE ^{CODESYS Forge talk (Post)}
Hello everyone I have been trying to solve this problem for a long time. Please help me..... I have browsed: https://forge.codesys.com/drv/sm3raspistepper/home/Home/ and it says under "IMPLIMENTATION" that I have to create a POU with the text to be able to use: MC_Power or MC_MoveVelocity How do I write it into the CODESYS program? Thanks in advance /Klaus Kalmeyer
Last updated: 2025-11-17

Post by brell on Automatic xExecute NBS.TCP_write ^{CODESYS Forge talk (Post)}
I've recently started experimenting with CODESYS for a project and am fairly new to it. I'm currently working with Function Block Diagrams (FBD) to set up TCP communication between a server and a client, where the client is implemented as a Python script. Once the communication is established, my connection status changes to True, which is the expected behavior. My challenge arises with the TCP write module, which requires the xEnable_write flag to toggle between True and False. If xEnable_write remains True, the module only performs a single write operation. To address this, I introduced a falling edge trigger (F_TRIG), expecting it to help in toggling xEnable_write and it does, However, I've encountered an issue where in the beginning after connxion established I need to manually set xEnable_write to True for the system to work as intended. I'm looking for a way to automate this process so that xEnable_write becomes True automatically upon establishing a connection . Initially, I tried setting xEnable_write to True from the start, but this approach didn't work well since it left the flag permanently True, preventing further toggling. I also experimented with using a TON timer, but I faced similar issues. I am seeking a solution that automatically toggles xEnable_write between True and False after a connection is established, ensuring continuous write operations without manual intervention. Any advice or guidance on how to achieve this would be greatly appreciated."
Last updated: 2024-03-05

Post by leafy on Use third party actuator with IO-Link Master (IFM) ^{CODESYS Forge talk (Post)}
Hey there! I am currently doing a little automation project for uni. I am trying to integrate a control-valve-system (Buerkert AirLINE Field) in my IO-Link environment. With IFM sensors, I used their pre-built function blocks, but with this third-party device, i need to write my own function block. Thankfully, IFM provides a generic sensor-fb so I can write my own FB with "extends" and "super". So far, so good. I found the IODD and some other documentation and I thought I get how it works, but somehow can't really get it to work at all. From my understanding, i need to write data into the PDO-Array. But i get confused with the indices and subindices of IO-Link. I'll append the IODD and some screenshots of my project. There is an AOI for LogicXDesigner, but I can't use that in Codesys. I hope someone has integrated a IOL-device in Codesys before and can help me with this. Cheers leafy
Last updated: 2024-04-16

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