Post by hannibal on Codesys Trend - setting Y axis minimum and maximum as variables - error ^{CODESYS Forge talk (Post)}
I am experiencing an issue when trying to define the Y-axis limits in a Trend Graphic using variables. When I set the Minimum and Maximum values as variables, an error is triggered. My goal is to make the Y-axis limits dynamic so they can adjust according to the installation. Both variables are initialized as follows: gP_YMin = -100.0 gP_YMax = 100.0 However, I still get the following error: "The minimum axis value must be less than the maximum axis value" Does anyone have an idea why this is happening or how to resolve it?
Last updated: 2026-03-22

Post by husarz17 on How change Unity-ID in TCP Modbus Slave ^{CODESYS Forge talk (Post)}
My codesys is 3.5.21.30. I am using function ModbusServer from library ModbusTCP_Slave. The reason is that I need share 9000 Holding registers. By standard configuration it is only 4096. fbMbTcpDevice: ModbusTCP_Slave.ModbusServer; fbMbTcpDevice( wPort := 502, pInputData := ADR(awInputReg), pOutputData := ADR(awHoldingReg), uiInputDataSize := 10, uiOutputDataSize := 9000, xEnable := TRUE, tTimeout := 10000, InterfaceName := "eth0", xBusy => xBusy, xError => xError, byClientConnections => byConnections ); Ethernet port is cofigured: Network interface: eth0 IP address: 10.10.22.55 Subnet maskL 255.255.255.0 Default gateway: 0.0.0.0 And it only works when I am reading registers with ID 255 by Modbus Poll. Any other IDs don't work. The actual TCP client device try to read registers with ID 1 and I can't change it... Thanks in advance for your help!
Last updated: 2026-04-01

Post by egr99 on Modbus TCP Server connection is ESTABLISHED but all holding registers are value 0? ^{CODESYS Forge talk (Post)}
You're absolutely right. Sorry for that. In the meantime I wrote a Function block to handle the reads and writes to the different attached RTU-devices. It processes the parameter like (str_Modbus:=(usiSlave:=1, uiFC:=5, uiLEN:=1, uiOFFSET:=0, uiInterval:=500)) and the corresponding output, waits for the response and processes next request in a 5-state procedure. It's working for 2 gateways (stable without errors, although error recovery is included). But nevertheless it should be possible with the Channel definitions of Codesys. Much easier to maintain :)
Last updated: 2026-04-08

Post by rik123456 on Alarmmanagement – Dynamic Alarm List ^{CODESYS Forge talk (Post)}
Hi, I had a question about alarm management in the CODESYS visualization. I am currently investigating to what extent the alarm visualization can be built dynamically. In my program, I have developed a motor block that is used for multiple motors. When the emergency stop of one or more motors is activated, the corresponding motors are displayed in the alarm list (see image). This works quite well. I achieved this by linking variables to a latch, after which a piece of code displays the motors that are in emergency stop. My question is: do I need to create a separate latch for each motor or can I use a single latch to display multiple alarms of a motor underneath each other? This would then look like this: Time…: M1 Emergency Stop Active Time…: M4 Emergency Stop Active
Last updated: 2026-04-20

Post by cvrettacos-dse on How to reset scroll of a table element ^{CODESYS Forge talk (Post)}
Hello, I would like to use swipe/pan gestures to scroll a table visualization element (CODESYS 3.5.21.10) ona DSE M810 display. The swipe / pan gesture control works fine, however, I cannot figure out how to reset / navigate to the top of the table again with code. I have tried the Scrolling begin variable, and the visu manager is setting it to FALSE right away but the table doesn't actually scroll back to top. If I check the “Scroll elements with scrollbar” box, then the Scrolling begin variable works perfectly, but now the swipe/pan scrolling no longer works and you have to use the scrollbar. Any assitence you can provide is appreciated. Thanks.
Last updated: 2026-04-21

Post by alexgooi on Network variable stops sending ^{CODESYS Forge talk (Post)}
Hi Reinier, What usually works for me is settings it up in the following way: In the sender block make sure that the list identifier is unique for the whole installation (this is only relevant when you have multiple senders in 1 network). When you are linking the NVL to a file make sure that the path to this file doesn't change. In my experience the NVL stops working when you change the working directory and afterwards open the NVL in de Codesys IDE. If this doesn’t apply to you application, you could also try to change the port number, maybe there is an other process making use of port 1202. Kind regards Alex
Last updated: 2026-04-22

Post by timvh on library inside library ^{CODESYS Forge talk (Post)}
1) it should be possible to access the type SysTime in the project as A_Lib.SysTime. 2) you could add the SysTimeCore library to the library manager of your library (POU Pool). This might seem as a double library, but because of the placeholder resolution only one will be used. Then, in your library manager of your library, select the SysTimeCore library, right-click, select "Properties" and enable the option "Publish all IEC symbols ...." For more information about library development, you could follow our advanced training course in Ridderkerk. The next is scheduled for 24 and 25 June 2026 https://www.extendsmartcoding.nl/codesys-training/
Last updated: 2026-04-25

Post by bbm1995 on Security Screen - Custom Certificates for OPC UA Server? ^{CODESYS Forge talk (Post)}
Hi everyone, is it possible to use selfsigned/created certificates (eg. with X - Certificate and Key Management) as a OPC UA Server certificate in the Security Screen? As far as I know I can only upload client certificates to the PLC and move it to "Trusted", "Untrusted" and "Quarantined". Same question is on sps-forum.de
Last updated: 2023-08-23

Post by vformanek on No source code available for profinet library ^{CODESYS Forge talk (Post)}
I have tried downgrading and it seems fine now. I am now on version 4.3.0.0 for the library. Mainly the PN controller caused the issue for me. Funny weird is that even the PN controller versions 4.3.1.0 and 4.3.0.0 cause the error. Version 4.2.0.0 works fine.
Last updated: 2023-08-23

Post by fless on No source code available for profinet library ^{CODESYS Forge talk (Post)}
looks like you are running in a bug in the newest version 4.4.0 of the profinet library or the new library triggers a bug in your code. did you update your profinet device too? you could try to downgrade to an older version of the library. via library manager - placeholders, double click Profinet 4.4.0 in the library column and choose an older version.
Last updated: 2023-08-23

Post by jegerjon on XY Chart ^{CODESYS Forge talk (Post)}
I have a XY chart in a visualization that is working fine, all lines are presented correctly. When I present the XY chart visualization in a frame, it seemes as no values are recorded, all lines are zero. When i open the visualization containing the XY chart in e!cockpit i see the lines are presented correctly but still not in the frame. Any ideas?
Last updated: 2023-08-30

Post by ryandmg on Web Client (HMI) Disconnects from Webvisu (Weidmuller u-OS) ^{CODESYS Forge talk (Post)}
Ohhh OK. Yeah this seems to be timing like you said. Yeah I read through that document and came to the same conclusion. I haven't tried setting them both to 200ms. Maybe I'll give it a shot. Thanks so much for your input. Its greatly apreciated.
Last updated: 2023-09-06

Post by transmin01 on EL6751 Canopen_Manager issue ^{CODESYS Forge talk (Post)}
Hi, I have a Beckhoff EL6751 EtherCAT / CANopen gateway which fails on the Canbus when the CANopen_Manager is added. Currently no devices are connected to the EL6751. If I add a device, I get the same issue. If I add a device and connect the bus, I get the same issue. Is there something I am doing wrong? Regards Trevor
Last updated: 2023-09-12

Post by spareparts on SPI Master not running/MCP3008 Missing driver. ^{CODESYS Forge talk (Post)}
I believe I have installed the correct device descriptions and library, in an attempt to use the MCP3008 in conjunction with RPI; when project runs the MCP3008 is unable to find the correct driver. Is there anything I'm missing? Very new to this so any help is apprecated!
Last updated: 2023-09-12

Post by kdasystems on WebVisu on mobile devices ^{CODESYS Forge talk (Post)}
Hello I have a problem with web visu. When I open it to normal screen it is with good quality, but when I use it on mobile phone or tab then it is really bad quality, almost not possible to read the information. Can somebody help me what are the exact settings in the visu manager for this
Last updated: 2023-09-13

Post by transmin01 on EtherCat Master cannot open network adaptor on Win10x64 target ^{CODESYS Forge talk (Post)}
Hi, If I utilise an EtherCat master with a Beckhoff EK1100 coupler on a Win10x64 target I get a "Network Adaptor could not be opened" error. I have tried this on both a VM and a physical PC. Has anyone experienced this issue? Regards Trevor
Last updated: 2023-09-14

Post by snhatton on Alarm Management - latched variable represented as Text list ^{CODESYS Forge talk (Post)}
Hi There, For my understanding: are you trying to display the contents of a text list in an alarm message based on the id? For example, you could maintain a text list of common alarm messages, and then display based on which message is true?
Last updated: 2023-09-18

Post by derpaul on Official MQTT-Client: MAX_RECEIVE_BUFFER_SIZE_EXCEEDED ^{CODESYS Forge talk (Post)}
Hello, my PFC200 has run for a few month now without problems. But now it freezed 2 times a day. LEDs were green but the PLC was not reachable. After power off -> on. I found that the MQTT had an error: MAX_RECEIVE_BUFFER_SIZE_EXCEEDED. And MQTT hadn't reconnect since then. I tried a cold and a warm reset but nothing helped. How can I solve this? Regards, Paul
Last updated: 2023-09-21

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 callumo1 on Check For Open Dialogs On Client ^{CODESYS Forge talk (Post)}
Is it possible to make a function that checks to see if there are any open dialogs on a given clients. I think VisuDialogs.VisuDlgUtil_IsDialogOpen does this for a given dialog name, but is it possible to do this for any dialog. Appretiate any help Cheers Callum
Last updated: 2023-09-25

Post by callumo1 on Check For Open Dialogs On Client ^{CODESYS Forge talk (Post)}
Thanks for the reply. I want to be able to check if any dialogs are open of any name. I already have a function similar to what you have send but I don't want to have to run it for all the different dialog names. Thanks
Last updated: 2023-09-26

Post by transmin01 on SafetyApp - "Invalid ERR Ack input" ^{CODESYS Forge talk (Post)}
Hi, I am trying to get a basic safety application to download but I keep getting an "Invalid ERR Ack input" and "The Standard Inputs Size of zero is not allowed". I am simply using 2 safety inputs through an "AND" block to 2 safety outputs. Any help would be appreciated. Regards Trevor.
Last updated: 2023-09-27

Post by transmin01 on SafetyApp - "Invalid ERR Ack input" ^{CODESYS Forge talk (Post)}
Hi, I am trying to get a basic safety application to download but I keep getting an "Invalid ERR Ack input" and "The Standard Inputs Size of zero is not allowed". I am simply using 2 safety inputs through an "AND" block to 2 safety outputs. Any help would be appreciated. Regards Trevor.
Last updated: 2023-09-27

Post by transmin01 on SafetyApp - Exchange 8 bits from EtherCAT Safety Module to PLC mapping issue ^{CODESYS Forge talk (Post)}
Hi, I am using an "Exchange 8 bits from EtherCAT Safety Module to PLC" module which allows me to create tags in the safety environment, but how does this map to the standard PLC program? There is no entry in the IoConfig_Globals variables list. Regards Trevor
Last updated: 2023-09-27

Post by manuknecht on Specify Input Configuration "OnDialogClosed" Action to only react to certain Dialogs ^{CODESYS Forge talk (Post)}
Thanks for your responses. The close listener sounds like an interesting approach, will have to see what I can do with it. I actually solved it as suggested by sturmghost by setting an enum variable to a certain state as soon as I open a dialog. This way I always know which dialog was opened last.
Last updated: 2023-10-02

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