Post by gatto on variables between two applications ^{CODESYS Forge talk (Post)}
Hello, I'm experimenting with two applications. I was able to start stop applications with the CmpApp library. Currently in my test the variables declared in the first application are not visible and writable in the second. I ask if there is the possibility of having variables that are visible both in the first application and in the second.
Last updated: 2024-06-22

Post by talhaali on Persistent variables not working for Control Win ^{CODESYS Forge talk (Post)}
Hi everyone, I am facing issues with persistent retain variables. It was working fine. I added a few new Persistent variables and it stopped working. If I do cold reset it holds persistent variable values. But when I close control win gracefully, and opens it again then it does not. Even, it is not saving ret file in application.
Last updated: 2024-09-10

Post by pietrobalint on Persistent variables are not read after initialization ^{CODESYS Forge talk (Post)}
Hi, I realized that if I replug the power supply the persistent variables lost their value with the new software too. Cold reset do not affect the variables value but hardware reboot still reset the values. Application Composer can't be activated. What is the solution?
Last updated: 2024-10-11

Post by danieldiaz on Problem with FB execution ^{CODESYS Forge talk (Post)}
Problem Solved, I was overwriting the variables somewhere else
Last updated: 2024-04-05

Post by eschwellinger on Persistent variables are not read after initialization ^{CODESYS Forge talk (Post)}
which version of the runtime do you use?
Last updated: 2024-09-02

Post by hambergg on Retain Variables on fRAM ^{CODESYS Forge talk (Post)}
Hi regarding NVRAM with SPI or I2C I expected reference too!
Last updated: 2024-09-03

Post by pascaljt on Function block for Ethernet/IP ^{CODESYS Forge talk (Post)}
Hello, I program a function for an Ethernet/IP controller. I made a structure with input and output corresponding with the map of my controller for the function block. My problem is that I don't know how to do the link between the controller and my PLC (CC 100 from Wago). The addresses declare in Codesys are illogic, The first addresses are 12 and 13 then 7 then 4. How to do corresponding the addresses of the controller and the input / output structure ? IP adress ? Does I must create the all variables of controller with the controller adresses to use with the function block ? Thanks for your help. (I hope I'm clear, I'm not english)
Last updated: 2023-10-26

Post by nathant on Saving variable values on power cycle (RevPi Connect) ^{CODESYS Forge talk (Post)}
Hello, this seems to be a known issue, but persistent/retain variables don't seem to work properly on RevPi devices. Is there a workaround to this? All I need is for a few configuration variables to be remembered through power cycle.
Last updated: 2023-12-03

Can a table be used as an input to date and time variables on a function block diagram? ^{CODESYS Forge talk (Thread)}
Can a table be used as an input to date and time variables on a function block diagram?
Last updated: 2022-09-15

Can a table be used as an input to date and time variables on a function block diagram? ^{CODESYS Forge talk (Thread)}
Can a table be used as an input to date and time variables on a function block diagram?
Last updated: 2022-09-15

Post by damian177 on Persistence variables PFC200 ^{CODESYS Forge talk (Post)}
Hi, I using persistence variables like below: VAR_GLOBAL PERSISTENT RETAIN id_worker1: ARRAY [0..3] OF INT := [231,234,176,222]; id_worker2: ARRAY [0..3] OF INT := [211,129,125,221]; Initial values can cause some problems?
Last updated: 2023-12-08

Post by alex-wall on Network Variables not updating ^{CODESYS Forge talk (Post)}
This worked for me. I had four identical PLC's. Three of them worked just fine with 255.255.255.255 as the broadcasting address but the 4th would not update the variables. Changed it to 192.168.x.255 and everything worked.
Last updated: 2024-05-07

Post by fless on Help with __SYSTEM.VAR_INFO ^{CODESYS Forge talk (Post)}
to get the address just use ADR( ) variables defined in a VAR_IN_OUT block are references pointing to the passed variables. VAR_IN_OUT MyVar: bool; END_VAR VAR adrMyVar: __XWORD; END_VAR adrMyVar := ADR(MyVar);
Last updated: 2025-01-26

[Bug report] Issue with Importing XML Files Containing "POINTER TO" Variables in Codesys Platform Plugins Versions 2.7 and 2.8 ^{CODESYS Forge talk (Thread)}
[Bug report] Issue with Importing XML Files Containing "POINTER TO" Variables in Codesys Platform Plugins Versions 2.7 and 2.8
Last updated: 2025-03-26

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 abrarsk on SysCom Library Usage ^{CODESYS Forge talk (Post)}
Update: I was able to successfully use the SysCom.lib. I had to install SysTypes2Interface library as well and wrote following code. Declaration hCom : RTS_IEC_HANDLE; pResult : POINTER TO RTS_IEC_RESULT; Implementation hCom := SysComOpen(ComSettings.sPort, ADR(pResult));
Last updated: 2024-08-10

Post by reinier-geers on Pointer Axis ^{CODESYS Forge talk (Post)}
I want to make a FB of MC. But i need a variable for Axis. How do i have to declare that ? ptAxe : AXIS_Ref_SM3; //:= SM_Drive_ETC_Delta_ASDA_A2 ; this is somehowe a problem
Last updated: 2024-01-12

Post by reinier-geers on Axis declare ^{CODESYS Forge talk (Post)}
In motioncontrol every block start with Axis. How can i make a variable to make my own FB ? Somthink like : _Axe : pointer to Axis_Ref_MC := Axis_1 ;
Last updated: 2024-02-13

Post by dtamm on How to read string from CharBufferPtr? ^{CODESYS Forge talk (Post)}
Solved it! The simple answer was to declare a variable as POINTER TO STRING and assign the GetMessage result to that variable. Then, the ^ operator can be used to extract the message as string.
Last updated: 2024-02-21

Post by kaithyamy on Auto Declare window disappears by itself in the Ladder editor ^{CODESYS Forge talk (Post)}
There are many genres that you have played five nights at freddy's, but you might have overlooked one. Let's test it out right away!
Last updated: 2025-03-14

Post by andrax on Variable Length Array - Cannot mix variable and fixed length dimensions? ^{CODESYS Forge talk (Post)}
Arrays with variable lengths are a bad idea. This makes your system unstable and can lead to crashes. Declare your array large enough to reserve enough memory
Last updated: 2025-05-24

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 stuartjr on POU Private variables ^{CODESYS Forge talk (Post)}
Pretty sure I know the answer, but thought I would ask just in case. Is there a way to set variables declared in a POU to private so that they can not be accessed from other POUs. I tried using the library pragma, but that just stops the variables being displayed in the selection tree. My compiler version is 2.3.9.62 if that's relevant, and I'm using an ABB AC500 V2 PLC. Cheers
Last updated: 2024-07-31

Post by pernockham on Is there a pragma for init/instantiation of local variables in FB (like in Methods) ^{CODESYS Forge talk (Post)}
Im using a pointer as input for a FB and for convenience I like to use 'referenced' variable internally. I use this setup in methods which works because internal variables are instantiated for each call. In a FB these variables are instantiated and initiated for the first call only. Is there a pragma/attribute available that changes this behaviour to mirror a 'method'-call?
Last updated: 2024-10-31

Post by stribor on Passing properties as VAR_IN_OUT variables. ^{CODESYS Forge talk (Post)}
I am designing a custom slider object and i ran into a problem when i want to use properties with it. I can update the basic variables if i have a slider variable defined as VAR_IN_OUT, but it does not work with properties. How can i achieve same functionality that some basic objects have (for example basic Slider that comes withing the codesys libraries) such that i can pass both variables and properties to it and they can be modified within the object? I am using Codesys V3.5 SP20 Patch 5.
Last updated: 2025-03-01

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