Post by dsa28 on OPC UA subscriber not operational ^{CODESYS Forge talk (Post)}
Hello All, Hopefully I can get some help configuring an OPC UA subscriber in a CODESYS runtime in a Raspberry Pi 5 that tries to retrieve data from an OPC UA publisher (in this case running in a TwinCAT system). I tried to follow the steps described in the page to implement the OPC UA subscriber: https://content.helpme-codesys.com/en/CODESYS%20Examples/_ex_opcua_pubsub.html Seems that the example provided was created with version 3.5.16.0. Now with version 3.5.20.20 is not possible to open the complete project neither convert it. Anyway, after configuring all IPs and ports used in the OPC UA connection function block but the connection state always shows DISABLED. Can someone help me to do the proper configuration of the OPC UA subscriber? Many thanks in advance.
Last updated: 2024-10-22

Post by niallel on CamBuilder and first boundary position not zero ^{CODESYS Forge talk (Post)}
Hi, I've read the CamBuilder documentation and it shows to use the left boundary of the first segment as SMCB.BoundImplicit(), so that the transition is as smooth as possible. With this it sets X and Y to 0. My first slave position is not 0 (say for example it's 100), so I would set it with SMCB.Bound(0,100). My question is that when the cam goes back to the start (Periodic := TRUE) , will it blend with the last position (360, 100) if I do this? I imagine it will, but the documentation isn't clear as the information in the Periodic Cams only says to set Smooth Transition in the cam properties - but when I'm defining it with code there isn't an option for Smooth Transition to be set. Hope this makes sense? Many thanks,
Last updated: 2024-10-23

Post by jeroenaero on CodeSys Raspberry pi I2C driver not found ^{CODESYS Forge talk (Post)}
Hello, We have a problem with CodeSys on a raspbery pi with an ADS1015 analog to I2C module. It can't find the I2C device on the i2c bus, it says No I2C Driver Found. When we use the RPI terminal we can find the I2C device and read it out. The i2c-1 bus is also accessible from codesys. The device address of the Analog to I2C module is 0x48. Can someone have a look what the problem is? i submitted the screenshots in the attachments. i also include the device description and library.
Last updated: 2024-11-07

Post by gatto on Undertanding Application Based Licenses ^{CODESYS Forge talk (Post)}
Hi, i think you are right. Did you press the key shopping cart? Codesys tells you the license. What I don't appreciate is that i need an additional license for communication. The system reports opc ua but this cheats you. This is communication that also concerns the tag symbols that codesys eth v3 exchanges with an operator panel. Attached is a screenshot of my case where you can see that communication opc ua is cheating you. 512 tags included in the program license are few. So, I had to buy 2 licenses. one for the program and one for communication. I don't like this policy.
Last updated: 2024-11-11

Post by andrax on CodeSys Raspberry pi I2C driver not found ^{CODESYS Forge talk (Post)}
Ok, here are the libraries I use. First of all, try to get the ADS1115 to run completely on its own. Without MUX or other sensors. As muxboard I use this one: https://www.digikey.de/de/products/detail/sparkfun-electronics/BOB-16784/12714950?utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax:%20Smart%20Shopping_Product_Zombie%20SKUs&utm_term=&productid=12714950&utm_content=&utm_id=go_cmp-18521752285_adg-_ad-__dev-c_ext-_prd-12714950_sig-Cj0KCQiA88a5BhDPARIsAFj595gkPXWPT8aa-EixL97BDWjO988WDhcx-iHOVbqb_H8CLpHBcwLuJW0aAu1JEALw_wcB&gad_source=1&gclid=Cj0KCQiA88a5BhDPARIsAFj595gkPXWPT8aa-EixL97BDWjO988WDhcx-iHOVbqb_H8CLpHBcwLuJW0aAu1JEALw_wcB All other boards don't work for me either. The terminating resistor is missing Important: Before you install the drivers, remove all other device drivers. My drivers are all located in ‘Raspberry I2C MUX_11_2023’
Last updated: 2024-11-11

Post by garrian on How to write multiple coils (Modbus FC15) ^{CODESYS Forge talk (Post)}
Hi there! I'm testing out modbus TCP/IP for my home brewery, using Wago PFC200 as both slave and master. I'm using Wago library WagoAppPlcModbus. Holding registers, input registers' and discrete inputs works fine, but when trying to write multiple coils, it doesn't work. Any idea what I'm doing wrong here? Attached is a screenshot of my code. I tried both using bit mapping and without. If I change to FC05, and write only 1 coil at the time, it works fine. But I want to write all at the same time.. Any help is very appreciated :)
Last updated: 2024-11-16

Post by pistola on Error during Updating the Visualisation ^{CODESYS Forge talk (Post)}
I've got a visualization I'm working on with some rectangles and lines. When I simulate the program I get an Error and Message in my message box, "Error during Updating the Visualisation:" and "Overflow error." Any ideas on how to fix this? I only have 70 elements total for this visualization. I am using absolute movement for a few of the elements, would this cause the issue? The visualization seemed fine before I added these movement elements, but there is only 7 that move, that doesn't seem like it should over load the system. I am currently testing using simulation so I'm not sure if that has an effect either. I tried looking in the codesys help manual and couldn't find anything referencing this.
Last updated: 2024-11-19

Post by tqvist on Gateway Start ^{CODESYS Forge talk (Post)}
Hello, I am trying to connect to my PLC (IFM CR711S) via VPN(EWON COSY). I have been told to use Gateway SP14 or higher. I installed CODESYS 3.5 SP20 Patch4. In the Codesys Installer Software I can sleect "Set Gateway Service" and I do so for CODESYS 3.5 SP20 Patch4. I can start the Gateyay and select About and it shows: "CoDeSys Gateway V3 - x64 Version 3.5.20.40" (see attached) For compatibility reasons I have to run my PLC code in 3.5 SP11 and when I start I can first connect but then somehow the system restarts an older version of the Gateway only displaying: "CoDeSys Gateway V3" (see attached) I guess my question is how to run an old Cocesys Software with a new Gateway?
Last updated: 2024-11-26

Post by dsa28 on OPC UA subscriber not operational ^{CODESYS Forge talk (Post)}
Hi, Thanks for the reply. Please note that the information and links provided are related to OPC UA Client/Server. My problem was related to OPC UA Pub/Sub. In the end I have managed to establish OPC UA Pub/Sub communication between Codesys and TwinCAT systems. Keep in mind that OPC UA Pub/Sub example is not provided in the latest library version 1.1.0.0. The user needs to download the previous version to get the example. During the configuration I ended up with some doubts regarding the usage of IEC_ARRAY type in the dataset definition (see attachment). Can you please give more information on how to use this type? Many thanks.
Last updated: 2024-11-29

Post by gseidel on Beckhoff AS1060 and EL7041 configuration ^{CODESYS Forge talk (Post)}
Hi pmanuele, while I don't have firsthand experience with the EL7041 and the step motor AS1060, there are two things you can check: If you use an external encoder, please make sure you use the alternative device description calles "EL7041 1Ch. Stepper motor output stage (50V, 5A) Rev24 with external Encoder". The SoftMotion driver will set the feedback type automatically, and use the correct object for the actual position (16#6010:21 instead of 16#6010:20) If you have problems with changing the controller mode, I assume to velocity, please make sure you change the PDO mapping so that the actual velocity (16#6020:33) and set velocity (16#7010:33) are mapped by PDO. Hope this helps, Georg
Last updated: 2024-12-23

Post by trusty-squire on Read "Homed" status from EtherCAT drive ^{CODESYS Forge talk (Post)}
Hi, Is there a way to read the homed status from the EtherCAT drive directly? I am currently flagging the homed status on the succesful completion of the MC_Home function block, but I have had false triggers where the drive didn't actually execute the homing procedure but the MC_Home FB is marked as complete without error. I looked at other MC/SMC function blocks but the closest I can find is the "Homing" bit from MC_ReadStatus FB, but this doesn't show if the drive is succesfully homed, only that it's homing. Any guidance is welcome. Thanks!
Last updated: 2025-01-07

Post by trusty-squire on Read "Homed" status from EtherCAT drive ^{CODESYS Forge talk (Post)}
@imdatatas, thanks for the info, I increased DSP402.uiHomingMinCycles to 10 and have a good feeling that will solve the issue of "false" homings. It's an intermittent issue so I'll report back once it's confirmed. @bruno-roth, also good info. According to my documentation, bit 14 is used to indicate the homed status. I did a test and the bit always stays true after it's been homed once (eg. even if I initiate a new homing procedure then hit the the e-stop mid homing), so I need to take that into consideration, but I can work with that. Thanks!
Last updated: 2025-01-09

Post by climblinne on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
Hello, I am already able to run an OPC UA method in Codesys. Now my question, how can I interact with other tasks (e.g. read an SDO from EtherCAT and return it by the function)? The OPC UA method seems to be called only once (I tried to return BOOL or UINT values). Up to now I only found to do a while loop to wait for the result of the other task. Is there a better way to do it? Is this the way OPC UA functions should be used (for "not too long" function calls) or should I use another mechanism (method: Start, event: Finish, method: getResult)? Regards
Last updated: 2025-01-13

Post by janber0206 on Adding PLC to the List view resolves in Unknown Error ^{CODESYS Forge talk (Post)}
Hello, I try to add one of my PLC from the Gateways to the List view. The Gateway is shown me as online, also i have other remote tools to verify the Internet connection is working. I do the Network Scan and the Gateway shows up, i select it and click on "Add to Server". Then I type in Username and password and click on confirm. There it shows me the "Unkown Error", see screenshot. If I use the wrong credentials it gives me the error message for this. Other Devices work fine it's just this one. Greetings Jannis
Last updated: 2025-02-21

Post by mkintegration on Reading Absolute Encoder Position From Yasakawa Drive ^{CODESYS Forge talk (Post)}
I am looking to read in the absolute position of a yaskawa servo drive Sigma 7 that is using absolute encoder. It looks like yaskawa outputs this across there CN1 I/O connecter and during operation just outputs encoder pulses. But at boot up transmits the Multiturn data position and the Position within one rotation (pulse train) on two different wires. Once the drives are enabled it just uses incremental pulses. Does any one have experience with what IEC blocks to use to read this information in. I attached the Yaskawa Manual section that talks about the format.
Last updated: 2025-02-26

Post by mkintegration on Reading Absolute Encoder Position From Yasakawa Drive ^{CODESYS Forge talk (Post)}
I am looking to read in the absolute position of a yaskawa servo drive Sigma 7 that is using absolute encoder. It looks like yaskawa outputs this across there CN1 I/O connecter and during operation just outputs encoder pulses. But at boot up transmits the Multiturn data position and the Position within one rotation (pulse train) on two different wires. Once the drives are enabled it just uses incremental pulses. Does any one have experience with what IEC blocks to use to read this information in. I attached the Yaskawa Manual section that talks about the format.
Last updated: 2025-02-26

Post by tyleretn on Codesys 3.5 SP18 P4 Freezing on Library Update ^{CODESYS Forge talk (Post)}
I have created a library with both code and visualizations to be used in multiple other projects. After I update the library version into the library repository, I have much difficulty updating the version into the main project. I can always update the library version in the Library Manager just fine. My issue, is sometimes Codesys will freeze when opening the visualization that uses the library visualizations. Sometimes it opens, but freezes when I try to access the library visualizations from the Visualization Toolbox. I try letting Codesys run for upwards of 4+ hours and it is stuck in this state. On very rare cases I have no issues and can continue with my work. I haven't found a consistent reason or work around. Has anyone else had this happen?
Last updated: 2025-02-27

Post by timvh on Problem Reading Registers via Modbus from non Codesys device ^{CODESYS Forge talk (Post)}
According to the documentation: https://wiki.teltonika-networks.com/view/RUT956_Modbus You need to create a Channel to read 2 registers from address 143 to get the lattitude. It doesn't specify if you need to read it as a Holding Register or as an Input Register. You could try both. So in the Teltonika router, you need to enable it as being a Modbus Server. Then in CODESYS add an Ethernet Adapter, then a Modbus Client (Master) and to the Client (Master) add the Modbus Server (Slave). Set the IP address and add the Channel. The please consider that CODESYS doesn't update any variables when they are not used in the application. In the I/O mapping tab of your I/O configuration, you can set the "Always update" to enabled.
Last updated: 2025-03-08

Post by struccc on Problem Reading Registers via Modbus from non Codesys device ^{CODESYS Forge talk (Post)}
Hi, Might be a good idea first to try out the connection and the device with some handy software, like Modbus Poll. There you can see better, what's really going on... - Is it really connected? - What error code does it return? - Can it read from the register address? - Maybe try Input registers and Holding Registers - can make a difference - Sometimes register addresses are messed up: shifted +-1 (mixing of 2 standards) - Sometimes register addresses start with offset 30000, 40000 ... - Are you using the right protocol? - Is it RTU or TCP? Maybe ASCII? - Can even have a look at the data packets, etc... All this is easier to figure out first with some modbus utility... and then to set it up in CODESYS should not be an issue. P.
Last updated: 2025-03-09

Post by atone on CAA File Handling: "Read only" error ^{CODESYS Forge talk (Post)}
In case of error while opening the file to read you assume that the file doesn't exist and try to create one. But it could be that the SD card is not ready yet or simply not there. I would try to check first if the SD card is there and accessible. Otherwise with FILE.Create you could end up creating a new directory that is not mapped to the SD card. This would explain the errors even after a reboot, though it doesn't explain the READ_ONLY_CAA error I guess? I would use FILE.DirOpen and FILE.DirList to check if the SD card is there and ready.
Last updated: 2025-03-20

Post by spiessli on Objects in OPC UA Information Model ^{CODESYS Forge talk (Post)}
Hi, I have an OPC UA information model with objects defined in it. I can import the model and use the data types defined in it and create instances of these types. These instances are accessible at Root > Objects > DeviceSet > CODE[...] > Resources > Application > GlobalVars > OPC_UA_Symbols for created instances and at [...] > Programs > PLC_PRG for mapped instances. The object defined in the information model is accessible in UA Expert by the name I have defined in the information model (Manipulator) at Root > Objects > Manipulator. How can I assign values to the Variables defined in the object "Manipulator"? Cheers, spiessli
Last updated: 2025-03-27

Post by otbeka 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/ 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.
Last updated: 2025-05-02

Post by elsmart on Sequential read and triggering of Modbs RTU channels in application ^{CODESYS Forge talk (Post)}
Hello I need some help understanding how to use Modbus RTU (COM port) in Codesys enviroment. I defined a Modbus Server device (slave) in device tree and added some channels to read from (function 3). Also I set trigering mode to Application. I have a POU in which I want to trigger each channel one after the other something like this (C code for better visualisation): for (int i = 0; i < channelsCount; i++) { triggerChannel(channelsArray[i]); // Start transmission while(channel.xBusy); // Wait for transmission to complete } I have found ModbusChannel function block documentation but examples are scarce. I don't understand how rising edge triggering works. What would be the best solution for achieving sequntial channel triggering? What is the common way to read multiple Modbus channels once every time a specified POU is executed?
Last updated: 2025-05-16

Post by milan-svarny on ModbusFB.ClientSerial Problem with Reply Timeout ^{CODESYS Forge talk (Post)}
Hi All, I have problem with ModbusFB.ClientSerial. I'm using 4 different port for Modbus communication. After some time of running program ClientSerial stops to receive data to reply buffer and all request finish with Reply Timeout. The Device sent reply correctly,that it is visible on oscilloscope and it is possible to see that data( reply )are in the device. If the usbtty device is read over external app. then it is possible to see all data which were not taken by ModbusFB.ClientSerial. The stack does not overflow or something , program runs correctly forward and no exceptions or something. The main problem it is that when the error occur than it is not possible to reset port or something or maybe i'm doing it wrong way. please help me with this issue. Thank you for any help in advice Milan
Last updated: 2025-05-23

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

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