Post by kareem-pt on Velocity is too low even though correct value is reported ^{CODESYS Forge talk (Post)}
Hello, I'm playing around with a single axis. I've setup scaling and set the drive to move 360 degrees in the commissioning tab. The axis does move 360 degrees, but it moves much slower than the 360 degrees per second that I set for the velocity. It seems to be about 3 times slower (taking about 3 seconds instead of 1). This is despite the set and actual velocity both being displayed as 360. The acceleration, deceleration and jerk are all set to very high values. I'm just running this on my PC, using demo mode (no license purchased yet). I've attached a video showing the problem. Does anyone know what the problem could be? Thanks
Last updated: 2025-06-06

Post by levih on FbHTTPs_Get how to get data from a website and use it in codesys ^{CODESYS Forge talk (Post)}
You get an array of DWORD into your receive buffer. You need to process this into usable data, before you can fit it into your DUT. I've made it work using FbWrite_ToIEC_ByRule in stead of Fb_JSON_ParseAndModify. I've attached images of the code. You receive the data into ARRAY[0..1023] OF DWORD. Then you use that array as the input for fbWrite_ToIEC_ByRule. To get the output from this you define a rule to fit the expected data structure including nesting levels. The you feed the rule into FbWrite_ToIEC_ByRule and then you can set the output to be of your DUT type.
Last updated: 2025-06-16

Post by buczekj on About CPU Loading ^{CODESYS Forge talk (Post)}
This is a phenomenon that I have seen myself and with others. Texas instruments wrote an application note with this same issue. They noted with Codesys 3.5.19.10, that selecting CPU 1 as the EtherCAT task showed CPU spiking improvements over the performance of cores 0, 2, and 3. It appears to be linked to EtherCAT, are you configuring for use with distributed clocks? If so, I recommend choosing the 'Based on Input Reference' option. I have found it to reduce the CPU usage spike maximum slightly (see attached). See link to TI (also attached in case link breaks) https://www.ti.com/lit/an/spradh0/spradh0.pdf?ts=1723546111357
Last updated: 2025-07-01

Post by timvh on control loop library IIR filter ^{CODESYS Forge talk (Post)}
In the Control Loop Library package are multiple example projects, including one for the filters. Program containing: GVL.filterIIR( xEnable:= GVL.xEnableFilter, lrValue:= GVL.lrYOriginal, lrFilteredValue=> GVL.lrOutputIIR); GVL.filterFIR( xEnable:= GVL.xEnableFilter, lrValue:= GVL.lrYOriginal, lrFilteredValue=> GVL.lrOutputFIR); GVL.filterSOS( xEnable:= GVL.xEnableFilter, lrValue:= GVL.lrYOriginal, lrFilteredValue=> GVL.lrOutputSOS); GVL containing aCoefficientsA_IIR : ARRAY[0.. 4] OF LREAL := [1,-2.3695130071820376,2.31398841441588,-1.0546654058785676,0.18737949236818494]; aCoefficientsB_IIR : ARRAY[0.. 4] OF LREAL := [0.0048243433577162282,0.019297373430864913,0.028946060146297369,0.019297373430864913,0.0048243433577162282]; filterIIR : Ctrl.Filter_IIR := (palrCoefficientsA:= ADR(GVL.aCoefficientsA_IIR), udiSizeCoefficientsA:= SIZEOF(GVL.aCoefficientsA_IIR), palrCoefficientsB:= ADR(GVL.aCoefficientsB_IIR), udiSizeCoefficientsB:= SIZEOF(GVL.aCoefficientsB_IIR)); aCoefficientsB_FIR : ARRAY[0.. 5] OF LREAL := [0.01982722552692669,0.1325131219866022,0.34765965248647102,0.34765965248647107,0.13251312198660226,0.019827225526926694]; filterFIR : Ctrl.Filter_FIR := (palrCoefficientsB:= ADR(GVL.aCoefficientsB_FIR), udiSizeCoefficientsB:= SIZEOF(GVL.aCoefficientsB_FIR)); aCoefficientMatrix_SOS : ARRAY[0.. 1] OF Ctrl.FilterCoefficients_SOS := [(b0:= 1, b1:= 2, b2:= 1, a0:= 1, a1:= -1.048599576362609, a2:= 0.2961403575616683), (b0:= 1, b1:= 2, b2:= 1, a0:= 1, a1:= -1.320913430819428, a2:= 0.6327387928852787)]; lrG : LREAL := 0.004824343357716228; filterSOS : Ctrl.Filter_SOS := (paCoefficientMatrix:= ADR(GVL.aCoefficientMatrix_SOS), udiSizeCoefficientMatrix:= SIZEOF(GVL.aCoefficientMatrix_SOS), lrGain:= GVL.lrG); lrX : LREAL; lrYOriginal : LREAL; lrOutputFIR : LREAL; lrOutputIIR : LREAL; lrOutputSOS : LREAL; xEnableFilter : BOOL := TRUE;
Last updated: 2025-08-01

Post by micik on Changed Device of Rapberry Pi to MC SL instead of standard SL and cannot connect anymore ^{CODESYS Forge talk (Post)}
I have a test application and use Codesys Control for Rasp Pi SL. I made a mistake and updated device from MSL to MC SL, and now if I try to go online with archived version of the project I gett error message that IDs are different between project device and target device. Of course, I can go online if I changed device in the project from SL to MC SL, but I'm not sure that is correct. So I have two questions: 1. What is the actual difference between MC SL device and standard SL device when it comes to raspberry pi 4? 2. What change I need to do on raspberry pi4 side to change device back from MC SL to SL? Thank you!
Last updated: 2025-08-05

Post by timvh on Dynamically enabling/disabling Modbus slave devices in runtime (performance issue with timeouts) ^{CODESYS Forge talk (Post)}
As far as I remember, the Reconfigure functionality doesn't work for Modbus devices. But... Each Modbus device in your device tree has a name. You can set the property "Enable" of this device to FALSE to stop communicating with it. So if one of your Modbus Slave devices name is "MbSlave1" in the device tree, then in your code you can set the Enable to FALSE to let it stop communicating: MbSlave1.Enable := FALSE; Please let us know if this worked on your controller with your application and your CODESYS version. Alternatively you could use the ModbusFB library. See: https://forge.codesys.com/prj/codesys-example/modbus/home/Home/
Last updated: 2025-08-13

Post by rer-code on Codesys 3.5.18.60 – Application Loss and Persistent Data Corruption ^{CODESYS Forge talk (Post)}
Hi, I’m currently managing over 50 PLCs running Codesys version 3.5.18.60. At seemingly random intervals, some of these devices experience a failure where: All persistent variables are lost. Attempting to log in results in the message: “The application does not exist on device. Do you want to create it and proceed with download?” The log shows: “Loading retain-data/bootproject failed.” From what I’ve gathered, this may be due to a corrupted persistent data file, but I’m not entirely sure how to confirm or resolve this issue. If anyone has encountered something similar or has suggestions for troubleshooting or preventing this, I would greatly appreciate your input. Best regards
Last updated: 2025-08-19

Post by bruceae on Special Characters ^{CODESYS Forge talk (Post)}
Hello, I am fairly new to the codesys environment. Is there a reference chart that I can look at in order to write special character in a string? The Special characters that I need to inclue inside the string are as follows; Null Bell Carriage Return I have a TCP_Write command that I am sending to an external device. In order for that device to function properly it needs to see the string with the null and bell characters as the header, followed by the desired command, terminated with the carriage return. Any reference sheet or how to write this in the actual string would be greatly appreciated.
Last updated: 2025-08-26

Post by pernockham on AC Persistence - values are not read from file during start? ^{CODESYS Forge talk (Post)}
I swear I tested this like 20 times yesterday without success. Repeated it today and it works. Maybe the system needed a "real" power reboot? To note. To make a manual edit of a variable I tried some different approaches this is what worked for me. "system/online edited" gvl_var.example_variable REAL:F16#2FFB334H-4 767.7 "manually edited" (with runtime stopped followed by a "cold start" to read from file) gvl_var.example_variable REAL:790.1 (the system will use the manual value but will not set an equivalent "hex" value until next online edit/write cycle)
Last updated: 2025-09-03

Post by taywinkel on Virtual Runtime CSV Utility Error ^{CODESYS Forge talk (Post)}
Hello, I am having trouble figuring out the proper location for my virtual runtime to create a .CSV file. No matter the file location I set, I get error 14 (CANNOT_OPEN_DIRECTORY). I have tried multiple different file paths ('/', '/var/opt/codesysvcontrol/PlcLogic', '/var/opt/codesys/'). I understand that there is only certain places that Codesys can read/write. I am also running this virtual runtime in a Podman container. Does anyone know what the location should be? I attached the archive I was using, a project that tests CSV capability that I borrowed from someone else. Thanks!
Last updated: 2025-09-03

Post by durallymax on Persistent Vars ^{CODESYS Forge talk (Post)}
Looking for a better way to manage Persistent Variables. We tend to have local vars in our FBs that need persistence through downloads as the systems are updated/altered on a regular basis. Retain would suffice if we had an easy mechanism to backup and restore like we can with Persistent variables and recipes. Although not having to remember that step with Persistent variables is preferred. We're running into issues with persistent storage capacity (WAGO PFC200) using the Persistent variable list (and adding all instances). It appears there are many ways to handle this, some with recipes, some with files, others with application manager. Is there a solution that exists that is as simple as declaring as Persistent and managing elsewhere? Or do we need to move onto periodically writing CSVs?
Last updated: 2025-09-22

Post by blitz on Arcs intersection ^{CODESYS Forge talk (Post)}
Does anyone have an idea how to run such a spiral on CNC smoothly without stops? SMC_SmoothPath and SMC_RoundPath don’t help. In general according to the documentation they should work on arcs but in the example only straight lines are shown and I get the impression these functions only work for straight lines. N005 G51 D15 N010 G01 X120.00 Y120.72 F100 N020 G03 X110.00 Y130.72 I-10.00 J0.00 F100 N030 G03 X100.00 Y120.72 I0.00 J-10.00 F100 N040 G03 X140.00 Y120.72 I20.00 J0.00 F100 N050 G01 X140.00 Y120.72 F100 N060 G03 X80.00 Y120.72 I-30.00 J1.67 F100 N070 G01 X80.00 Y120.72 F100 N080 G03 X160.00 Y120.72 I40.00 J-1.25 F100 N090 G01 X160.00 Y120.72 F100 N100 G03 X50.00 Y120.72 I-55.00 J-5.00 F100 N110 G01 X50.00 Y120.72 F100 N120 G03 X190.00 Y120.72 I70.00 J-0.71 F100 N125 G50 N130 M30
Last updated: 2025-09-23

Post by reinholdgaylord on CAA File Handling: "Read only" error ^{CODESYS Forge talk (Post)}
Hi, sorry for the late reply. After some investigation, the read-only error was being triggered by a FAT-fs filesystem panic on the kernel end, probably caused by unfinished write/reads causing corruption. I found this thread https://forge.codesys.com/forge/talk/Engineering/thread/e637d252b7/geometry dash lite which seems to give a solution of using SysProcess to send the 'sync' command to the console immediately following a write to prevent issues if power is lost or, in my case, if the unit is harshly power cycled. Indeed this seems to resolve the issue bar the worst possible edge cases. Thank you so much!
Last updated: 2025-09-25

Post by pernockham on *Exception* Async service: ServiceGroup=17, IP=0x5fa45617, Component=CmpSrv ^{CODESYS Forge talk (Post)}
*** The system may be in an inconsistent state, please reboot *** *Exception* Async service: ServiceGroup=17, IP=0x5fa45617, Component=CmpSrv Every time at the instant that I Login to the system a message that the "system may be in an inconsistent state, please reboot" is written in the log. If I logout and repeat login a new entry is set. My system is a "Control for linux SL" running on a debian linux host. Im running it on my desk without any IO attached so message might be caused from that, but I doubt i have seen it before. Rebooting makes no difference. Anyone that have a clue of how I should interpret this error message?
Last updated: 2025-09-26

Post by alexgooi on Licensing info not available. ^{CODESYS Forge talk (Post)}
Dear Forum I have the following config: Codesys_IDE 3.5.20 Codesys_Virtual_Control 4.13 Codesys_License_Server 4.13 I know these are not the newest versions, but in my mind these should work. I have the same problem here. I have the license server installed on the host, and in the docker container(Codesys virtual control) I'm able to ping the license server. In the /conf/codesyscontrol/CODESYSControl_User.cfg I have added the following config: [CmpCodeMeter] EnableNetLicenses=1 LicenseServer.1="ip address of the host" I have tried it via the wbm web-page. I can create new license containers over there, but still no luck. I also have tried to run the docker container with the -s "server_IP" command. I have searched for some tutorial's but I couldn't find it. If anyone has some clue or can give me a push in the right direction it would be very very welcome!
Last updated: 2025-09-29

Post by alexgooi on Licensing info not available. ^{CODESYS Forge talk (Post)}
Thank you for the response, The empty softcontainer does not become visible unfortunately, but I think I can get that back to working. I think I'm misunderstanding something. You are pointing to the Softcontainer number and the ticket code, I thought that I needed to fill in the virtual control containers serial code is this a misunderstanding? And if this is indeed the case, how is the link between the server (softcontainer) and the Codesys control docker container made? If I have multiple Codesys docker containers running on the same docker server, how is the correct license distributed to the correct Codesys runtime container?
Last updated: 2025-10-02

Post by bbmussatto on Connetion with Topcon Opus B3 ECO Full display ^{CODESYS Forge talk (Post)}
I have a Topcon Opus B3 ECO Full display and i wanna program it with codesys, but i cant connect it to the display. After creating a new project, i choose the device "Opus B3-B4-B6-3.5.19.50" that is already available in my version of codesys, but i think the problem is that my version of codesys or something else is not the same as the codesys runtime version running on my display. Can anyone tell me how i can see the codesys runtime version on my display? i tried looking in the settings (Daemon > CDS) on the display, but all i see is "N/A" for "Customer Number", "Customer Part Number" and "Customer Serial Number". Can anyone help me make this connection?
Last updated: 2025-10-07

Post by ouzago on ERROR C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
When I created a new project in CODESYS using the "Standard Project" template and then added a Visualization, I was receiving the C0138 error during compilation. This issue persisted even with a new, completely empty project. A Quick and Effective Solution (My Method): After many attempts, I solved the problem as follows: From the File -> New Project menu, I selected the "HMI Project" template directly, instead of the "Standard Project" template. After creating the project with this template, I added my POUs, Tasks, and programs (e.g., Ladder, ST). Using this method, the project compiled successfully without any errors. So, my question is: are there any other solutions besides this method?
Last updated: 2025-10-07

Post by reinier-geers on Web client ^{CODESYS Forge talk (Post)}
Hi, ive got the webclient example. So now i want to use it. Ive got an example. but thats some JSON type. As far i know is JSONe som kind of structure. But thats new for me. I think its posible with get. Can someone help me? This is the link witch explains what to do https://reversed.notion.site/Marktprijzen-API-89ce600a88ac4abe8c2ad89d3167a83e i tried this : sURL : STRING(1024) := 'https://graphql.frankenergie.nl/get/ {"query":"query MarketPrices {\n marketPrices(date:\"2022-01-01\") {\n electricityPrices {\n from\n till\n marketPrice\n marketPriceTax\n sourcingMarkupPrice\n energyTaxPrice\n perUnit\n }\n gasPrices {\n from\n till\n marketPrice\n marketPriceTax\n sourcingMarkupPrice\n energyTaxPrice\n perUnit\n }\n }\n}\n"}'; // URL But thats a bad request
Last updated: 2025-10-08

Post by budd7566 on Text size suddenly changed ^{CODESYS Forge talk (Post)}
Iv been working with a Deep Sea Electronics DSE840 for about 6 months. I have a development version of my program working with a state machine and a basic gui interface. I went to implement CAN and suddenly the text on the gui on the controller is much larger than before. I could flash old versions of my project and the text was the correct size, but if i renamed the project file, the text displayed would be large. The visualization in CODESYS always shows the expected size, but not the controller. I did a fresh install of CODESYS and even a new project with only one text box, I cant get the text size on the controller to match what is displayed in codesys to match. Any advice?
Last updated: 2023-12-09

Post by sumit on Remote Ethernet/ip Adapter communication with scanner running on codesys ^{CODESYS Forge talk (Post)}
Hello there, I have my ethernet/ip adapter (from Texas Instrument) running on Texas Instrument Board and I have configured the scanner on codesys. I have mapped the I/Os and I can see (on wireshark) the frames coming from adapter but I don't see my input variables in scanner get updated, they just stay at 0. I wanted to see the real data that has been sent from adapter to scanner on codesys. I am not sure if the problem is in I/O mapping or there is a step/s that I have missed. I have attached the screenshot of my project for your ref. Thank you, Sumit
Last updated: 2023-12-15

Post by sumit on Remote Ethernet/ip Adapter communication with scanner running on codesys ^{CODESYS Forge talk (Post)}
Hello there, I have my ethernet/ip adapter (from Texas Instrument) running on Texas Instrument Board and I have configured the scanner on codesys. I have mapped the I/Os and I can see (on wireshark) the frames coming from adapter but I don't see my input variables in scanner get updated, they just stay at 0. I wanted to see the real data that has been sent from adapter to scanner on codesys. I am not sure if the problem is in I/O mapping or there is a step/s that I have missed. I have attached the screenshot of my project for your ref. Thank you, Sumit
Last updated: 2023-12-15

Post by user3000 on Can't find an Extended Pulse Timer (TP and LTP) ^{CODESYS Forge talk (Post)}
I came up with an FBD that seems to be working, although it may not be a true Retriggerable Pulse timer. There may be some delay associated with the two MOVE functions and ADD function I incorporated. I'd be interested if anyone is able to come up with something cleaner. I am surprised that this is not a built-in function block of the CodeSYS library. This is a common feature of multi-function timer relays. I also attached a page from the cut sheet of a Schneider relay that shows 10 timing functions. Looks like the CodeSYS library has built-in function blocks for only 3 of the 10.
Last updated: 2023-12-21

Post by dhumphries on Codesys device configuration ^{CODESYS Forge talk (Post)}
First make sure the programming laptop and HMI are both on the same subnet. For example if the IP address of the HMI is 192.168.1.125 with a subnet mask 255.255.255.0 set your laptop IP to 192.168.1.120 with a subnet mask of 255.255.255.0. Make sure the cables are fully connected (the ethernet port on my programming laptop will click once but the cable is not fully seated.) Make sure the HMI is powered on, try pinging the device from a command prompt, if you can't ping the HMI there is a network issue that has to be resolved first.
Last updated: 2023-12-30

Post by jmohre on External file with relative path ^{CODESYS Forge talk (Post)}
I try to add a simple text file to my PLC application, so that is download everytime the application is downloaded to the target. What I did is to add an external file to the application and this works perfect as long as the external file location does not change. It looks like the external file path is stored absolute in project. But if different users work on the project they may have different locations where for their working directory. Is there an option to store the external file path relative e.g. to the project file? Or does s.o. know a different solution to add a text file to application in order to download automatically with the application? Thanks
Last updated: 2024-01-04

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