Post by nizrahel on OpC UA server on Raspberry Pi 64 SL runtime ^{CODESYS Forge talk (Post)}
Hi all! I'm working on an home project using a Raspberry Pi 3 device with Codesys for Raspberry Pi 64 SL runtime. I would like to create the HMI interface with Siemens WinCC Unified (or Advanced) configuring the Raspberry as OPC UA server. I tryed everything, but I didn't find the way to let the OPC UA connection works using UaExpert. I tryed to use anonymous connection, authenticated connection and the ip address instead of the server name in the path connection. There is no way to connect to the OPC UA server and I was asking myself if this feature is really supported for the runtime version used. Another strange thing I noted, is that is not possible to quickly create an OPC UA certificate in the Security Screen, as show in any tutorials. I have correctly created the Symbol Configuration enabling the OPC UA feature. I attach to this topic some printscreen of the actual configuration (sorry for the italian language interface, but I didn't find the way to switch to english). Thank you very much in advance for your support and advices!
Last updated: 2023-12-03

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 dkugler on Toggling Visualizations using HMI Physical Buttons ^{CODESYS Forge talk (Post)}
the magic option is named "Use CurrentVisu variable" activate this option in the Visualization Manager an have a look: https://help.codesys.com/webapp/_visu_obj_manager;product=core_visualization;version=3.5.14.0 if your button is pressed, "feed" the string varable VisuElems.CurrentVisu := 'visu1'; with the correct name of the depending visu. alternative: place a frame element at a empty main visu, konfigure all visus to be shown by this frame. With setting the switching variable of the frame to the index value of the depending visu, it will switch to it. Advantage: the visu names are not hardcoded as string in the ladder lodgic. Good luck! Hint: If you have multiple VisuClients(Target, WebVisu,...) all will show the same visu. Independent switching is much more difficult, but there is a example from codesys.
Last updated: 2024-02-13

Post by davidbo on Why does SysTimeRtcSet not set the clock on a Pi 4 ^{CODESYS Forge talk (Post)}
temp:=DT_TO_DWORD(newTD); result:=SysTimeRtcSet(ulTimestamp:=DWORD_TO_WORD(temp)); the result=0 which mean ok but the clock is not set
Last updated: 2025-06-27

Post by phoward131 on Text List Fallback Value ^{CODESYS Forge talk (Post)}
I am relatively new to Codesys and I'm trying to develop an HMI that displays what mode a particular device is in based on an integer value. I am currently using dynamic texts with a text list which works fine but I am looking for a way to display a particular string (ie 'Unknown') when the index doesn't match any of of the indices in the text list. I can enter 'Unknown' in the text property of the text field element which works as expected but it displays the single quotes on the visualization. How can I escape these quotes to simply display the word Unknown? Thanks!
Last updated: 2024-03-22

Post by struccc on The future and proper use of CAA.BOLT, CAA.SEMA,.. ^{CODESYS Forge talk (Post)}
Dear All, Dear CODESYS, I'm curiously following CODESYS transitioning away from the CAA libraries, and I'm mostly in favor of these major changes. Naturally, I'd like to align my current (not end-user) developments accordingly. I'm tracking , reading release notes, ... And want to figure out the future :) Is it possible to hear / read more about the reasons, objectives and scope of these changes? One important element is CAA Types - CAA Types Extern. What is the plan with that? What's the future of CAA.SEMA, CAA.BOLT ? I have never used them (always relied on SysLib*), but they are tempting... Would be useful to have a platform independent "Macro" for this functionality... Is there something in existing or planned ? Are they suitable to be used in low level libraries... For Example IO-Drivers, Components, "to-become system libraries"? CAA.TaskLock, CAA.TaskUnlock ? Well, they don't claim platform independency, so I can't rely on those.... Any up-to-date advise, standard, pattern to follow in new libraries for task and resource locking? Practical set of conditional defines to be used? If this information is not publicly available, can you please send a private message about the proper way to achieve this? I have support agreement, just couldn't get trough with these questions... P.
Last updated: 2025-03-14

Post by micik on False Notification Application Error with raspberry pi 4 ^{CODESYS Forge talk (Post)}
Hello, I have just went through all steps shown on Codesys YT channel https://www.youtube.com/watch?v=RPoPscbo3Kc And it works, I have installed PI OS 32 bit and choose Single Core. However, immediattely when I create standard project with Raspberrz pi device, "Application" is underlined, like there is an error, but in reality there are no errors, and I cannot see what are these 3 messages like shown in attachment. Aside for this red underline, everything seems to work fine. How to correct this? Thank you! Update: I have found what errors are, but not sure how to correct them: Identifier 'IoDrvGPIO' not defined Function block 'IoDrvGPIO' must be instantiated to be accessed 'IoDrvGPIO' is no component of 'IoDrvGPIO'
Last updated: 2024-09-03

Post by riccardo on Error while processing the visualization: Client id not present or no longer valid ^{CODESYS Forge talk (Post)}
Hallo goodmorning, I am using codesys 3.5 sp19 with Weidmueller PLC. I created a page with several checkbox to manage an array of bool. When I build the project the system doesn't signal any error, when I go in simulation mode everything works until I click on checkbox to toggle the variables. Other visu elements works proprerly (e.g. bottons, lights, ect, ect) but the check boxes cause a crash giving the following error: Error while processing the visualization: Client id not present or no longer valid I serched to figure the problem out and to search a solution on the web but nothing. Can someone help? Thanks and Regards, Scanu
Last updated: 2024-01-23

Post by lucaver89 on Raspberry pi 3 and runtime 4.9.0.0 ^{CODESYS Forge talk (Post)}
Good morning, I'm using a raspberry pi3 as plc with the runtime 4.9.0.0. My program has many of retrain variables but when an update is performed the retrain variables comes back to default values. Is the a way to backups the retrain variables n a csv file? Is still the way to restore them from the csv? Thank you for helping Luca
Last updated: 2023-09-23

Post by peter-skokanek on Rpi install runtime licence on SP13 ^{CODESYS Forge talk (Post)}
Hi, I have an older project which has been running for years. Unfortunately I have to replace current Raspberry. I repplaced it by new rpi 3 with newest 32 bit Raspberry OS. I oredered a new runtime licence. When I try to activate it, the connection to target is interrupted immediatelly after press next button in the last step of instalation.
Last updated: 2024-01-08

Post by evanclegg on Digital Clock ^{CODESYS Forge talk (Post)}
To display the current time, you’ll need to retrieve it from the system clock. In CODESYS, you can use the built-in function SysTime to get the current system time. Here’s an example of how you can use it: VAR dtCurrentTime: DATE_AND_TIME; sTime: STRING(8); END_VAR dtCurrentTime := SysTime(); sTime := TIME_TO_STRING(dtCurrentTime.t); The sTime variable now contains the current time in the format “HH:MM:SSuno online".
Last updated: 2024-02-28

Post by eschwellinger on Creating, using an external Function. ^{CODESYS Forge talk (Post)}
you need the check the plclog if the the component have been loaded on startup of th plc.
Last updated: 2025-04-19

Post by eschwellinger on SM Drive license error ^{CODESYS Forge talk (Post)}
goto the licensing metrix tab in CODESYS an check which license ...or send us a screenshot of it here
Last updated: 2024-01-10

Post by gilbertamine on Comparing Arrays of structure ^{CODESYS Forge talk (Post)}
Hi Everybody, I'm looking for a simple way of comparing two array of a structure. My structure is define like this : TYPE Positions_T : STRUCT PosX: DINT; PosY: DINT; PosZ: DINT; END_STRUCT END_TYPE I have multiples Var : ARRAY [0..220] OF Positions_T, that I need to compare quickly. I don't really want to do a Loop that goes by every 220 points and compare each one of them so I was wondering if there is another way. I came accross the MEM.Compare function, but it require to know the size in Bytes of the memory, and I don't know how to do that... Has anybody an idea on how to do the comparing easily ? Thanks in advance
Last updated: 2024-08-22

Post by jegerjon on Find index based on values ^{CODESYS Forge talk (Post)}
Hi, I need to figure out witch indexes of an Array containing the highest and lowest values. Typically search for the 5 lowest values and result the indexnumbers containing the 5 lovest values. is there a library for this, or codeexample?
Last updated: 2023-08-20

Post by jegerjon on Find index based on values ^{CODESYS Forge talk (Post)}
Hi, I need to figure out witch indexes of an Array containing the highest and lowest values. Typically search for the 5 lowest values and result the indexnumbers containing the 5 lovest values. is there a library for this, or codeexample?
Last updated: 2023-08-20

Post by dekelec on Codesys 2.3 & Peak PCAN ^{CODESYS Forge talk (Post)}
IF you have an USB interface type in "Peak_USB" for CAN card driver (Name of CAN card driver). No need to add libraries for communication via CoDeSys Gateway. For other card types contact PEAK support and they will help you. Regards,
Last updated: 2024-07-08

Post by nielscho on Saving "Input/output names" in a DCF file ^{CODESYS Forge talk (Post)}
Hello i have the same question but for Codesys 3.5. alternativley, could somebody name a Programm to create a DCF file out of an EDS? best regards
Last updated: 2025-07-02

Post by mickael on stepper motor + Raspberry pi 5 + Codesys ^{CODESYS Forge talk (Post)}
Hello, I can't figure out how to configure the DIR and STEP pins of the GPIO for an SM_Drive_RaspiStepper_Pulsdir axis. Can you send me a scan? Also, does the MC_POWER status always remain False? Thanks.
Last updated: 2025-07-06

Post by mickael on Motor stepper raspberry pi 5 Codesys ^{CODESYS Forge talk (Post)}
Hello, I can't figure out how to configure the DIR and STEP pins of the GPIO for an SM_Drive_RaspiStepper_Pulsdir axis. Can you send me a scan? Also, does the MC_POWER status always remain False? Thanks.
Last updated: 2025-07-06

Post by masmith1553 on HMI Pushbutton/Move Instruction ^{CODESYS Forge talk (Post)}
Have you cross referenced the variable to see if it is being written some where else? You could try an Execute block instead of a Move.
Last updated: 2024-01-25

Post by mondinmr on Jitter problems on imx8 ^{CODESYS Forge talk (Post)}
We are experiencing serious jitter issues on an ARM64 imx8. Until now, on rpi and beaglebone derivatives, and on Intel, we never encountered jitter issues unless they were already present on the device. In this case, as can be seen from the attached graph, we have excellent maximum latency. The cyclictest on the isolated core dedicated to IEC CODESYS tasks shows a latency of 37µs, with an average of 14µs. Usually, on all other devices, with an RT kernel, with the appropriate parameters to avoid frequency throttling, with properly managed IRQs, and with the disabling of large page sizes, the jitter measured by CODESYS is very close to the cyclictest latency. However, on this imx8, we are noticing a fluctuating value of +/- 300µs that seems to be added to this latency, as if something occasionally miscalculates the sleep times by exactly +/- 300µs. Two screenshoot attached. - Result of cyclictest - Jitter on CODESYS Tasks are assigned to isolated core!
Last updated: 2023-10-18

Post by arnog on Two drives on one axis, Gantry Robot ^{CODESYS Forge talk (Post)}
Hi TK_Jenssen did you found a solution I am setting up the samelike gantry only with two z-axes which are mounted on fix position with an X axes between the two z-axes. The movement and position of both z-axes must be very well aligned and calibrated. Maybe also to be adjusted by programming. Can you sent an example of your solution?
Last updated: 2023-08-25

Post by dhumphries on Minimum system requirements for codesys control standard S ^{CODESYS Forge talk (Post)}
I'm working on a low cost project and I'm considering installing the Codesys runtime on a PC running Linux Debian instead of buying a PLC with a pre-installed runtime. For my needs the Control Standard S license should be capable of running some IO over ethernet/ip, and a webvisu. The PC I am considering has a AMD GX-424CC 2.4GHz processor (4 core/4 thread) and 4GB RAM. This may compare to a raspberry pi4, but I know an X86 processor doesn't directly compare to an ARM processor, and a processor can have a high clock speed but other factors like L2/L3 cache can influence the overall performance. I can't find any published specs for the processor and RAM requirements to run the Codesys Control runtime, does anybody have a link to the minimum system requirements or experience using devices that are at or below the minimum system requirements. A raspberry pi with the control for raspberry pi SL runtime license would be the lowest cost option, but the license is not for commerical use. This restriction is somewhat vague, can anybody clarify if this means I can use a raspberry Pi runtime for in-house automation, what about if I am selling an integrated system that uses a raspberry Pi as a controller?
Last updated: 2023-12-25

Post by imdatatas on Problem of assigning physical addresses to variables of type ARRAY OF ARRAY as MW and QW ^{CODESYS Forge talk (Post)}
Hello, I am encountering an interesting problem as below in SP20patch5 variable definition area. I think this is a bug. As can be seen in the attached screenshot, it assigns the same %MW or %QW address to all elements of the array. I hope Codesys team can solve this problem in the next version. Best regards, Imdat
Last updated: 2025-03-17

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