Rpi Modbus TCP Slave Single Coil and Discrete Input read strange behaviour ^{CODESYS Forge talk (Thread)}
Rpi Modbus TCP Slave Single Coil and Discrete Input read strange behaviour
Last updated: 2020-11-03

How can I read and writie on the canbus without CANopen ^{CODESYS Forge talk (Thread)}
How can I read and writie on the canbus without CANopen
Last updated: 2019-10-01

PI + Beckhoff IO + CODESYS -- Issue with I/O Channels being Read/Updated ^{CODESYS Forge talk (Thread)}
PI + Beckhoff IO + CODESYS -- Issue with I/O Channels being Read/Updated
Last updated: 2018-12-26

I cannot use SysFile to open/read/write/close - RTS_IEC_HANDLE not defined ^{CODESYS Forge talk (Thread)}
I cannot use SysFile to open/read/write/close - RTS_IEC_HANDLE not defined
Last updated: 2017-09-22

Call python script for codesys from powershell and read return value ^{CODESYS Forge talk (Thread)}
Call python script for codesys from powershell and read return value
Last updated: 2020-07-30

Read real values in a .txt files with SysFileRead: possible? ^{CODESYS Forge talk (Thread)}
Read real values in a .txt files with SysFileRead: possible?
Last updated: 2013-01-30

Wago_IO-Link Master 750-657 unable to read all data frame ^{CODESYS Forge talk (Thread)}
Wago_IO-Link Master 750-657 unable to read all data frame
Last updated: 2022-06-10

How do you change the 'read offset' of a Modbus channel on the fly? ^{CODESYS Forge talk (Thread)}
How do you change the 'read offset' of a Modbus channel on the fly?
Last updated: 2021-04-14

How can I read from one directory all the file names? ^{CODESYS Forge talk (Thread)}
How can I read from one directory all the file names?
Last updated: 2018-01-04

How to read the status of one Modbus Slave in the codesys program ^{CODESYS Forge talk (Thread)}
How to read the status of one Modbus Slave in the codesys program
Last updated: 2021-08-15

how read analog value from Arduino Uno in Raspberry pi through I2 C protocol ^{CODESYS Forge talk (Thread)}
how read analog value from Arduino Uno in Raspberry pi through I2 C protocol
Last updated: 2022-05-30

How to read a csv file from local directory of plc ^{CODESYS Forge talk (Thread)}
How to read a csv file from local directory of plc
Last updated: 2018-01-31

Write float value in modbus register and Read value whit comma from codesys ^{CODESYS Forge talk (Thread)}
Write float value in modbus register and Read value whit comma from codesys
Last updated: 2018-05-28

How can i read data from a file into an array? ^{CODESYS Forge talk (Thread)}
How can i read data from a file into an array?
Last updated: 2021-08-09

Raspberry Pi USB HID RFID Reader - read ID in plc program ^{CODESYS Forge talk (Thread)}
Raspberry Pi USB HID RFID Reader - read ID in plc program
Last updated: 2024-01-25

Post by ademarvribeiro on Load (or Read) File from PLC ^{CODESYS Forge talk (Post)}
Online -> Read file from PLC. Go online after download, sometimes the program Running and programm saved in PLC are diferent.
Last updated: 2024-04-12

Post by mucleus on How do I fix ";Internal Error (x86-64): Invalid type size" error? ^{CODESYS Forge talk (Post)}
I opened the project file of version 3.5.19.7 in 3.5.21.0. I updated all the environment of the project to the latest and compiled it. When I compile it, I get an error ";Internal Error (x86-64): Invalid type size". How can I fix this error? I will wait for your help.
Last updated: 2025-04-15

Post by msegon on OPC UA Client failed to connect ^{CODESYS Forge talk (Post)}
Hi everyone, I would appreciate your help with a problem I've been working on for a few days but haven't been able to resolve. I'm trying to read data from Tridium Niagara 4.15 OPC UA Server, but I get the error BadCertificateInvalid. As far as I understand, you need to add a CA certificate somewhere to establish a secure connection, but I don't know where. 2025-10-27T09:06:43.247Z, 0x0000008d, 4, 0, 0, * ERROR: OpcUa_Channel_BeginConnect: Cannot create secure channel without certificates! 2025-10-27T09:06:43.247Z, 0x00001090, 4, 0, 0, * ERROR: Datasource: Error Failed (268468242) in state Connecting I tried communicating without encryption, but it doesn't find the point. Has anyone managed to establish encrypted OPC UA communication?
Last updated: 2025-10-28

Post by sajid on NMEA Serial data read in Control win v3 x64 ^{CODESYS Forge talk (Post)}
I am using the SerialCom example program from the CODESYS website to read NMEA strings in CODESYS Control Win V3 x64 through a serial-to-USB converter. However, I occasionally receive only partial data or encounter errors in the received string. A screenshot of expected NMEA string attached for reference. Could you please advise on how to ensure the full NMEA string is received consistently? Error in strRead variable is <value of="" the="" expression="" cannot="" be="" retrieved=""></value>
Last updated: 2025-10-16

Post by sajid on NMEA Serial data read in Control win v3 x64 ^{CODESYS Forge talk (Post)}
I am using the SerialCom example program from the CODESYS website to read NMEA strings in CODESYS Control Win V3 x64 through a serial-to-USB converter. However, I occasionally receive only partial data or encounter errors in the received string. A screenshot of expected NMEA string attached for reference. Could you please advise on how to ensure the full NMEA string is received consistently? Error in strRead variable is <value of="" the="" expression="" cannot="" be="" retrieved=""></value>
Last updated: 2025-10-16

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 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 davidbo on i2c How does CODESYS handle exception or error messages. ^{CODESYS Forge talk (Post)}
For Raspberry Pi I have made a python script which regularly read a bulk of data over the ic2 from a device. Sometimes I get an Exception an IOError. I assume similar things can happen in CODESYS. So how does CODESYS handle that? Can I get any info about such an event?
Last updated: 2024-02-07

Post by kuegerls on CSV Utility SL ^{CODESYS Forge talk (Post)}
Hello, I want to read a CSV file using the CSV Utility SL library, but I encounter an 'invalid_handle' error during initialization. What could be the cause? For my test program see the screenshot. I have purchased a license, and it is also installed on my PLC. Thank you in advance. Best regards, Stefan.
Last updated: 2024-05-13

Post by deeksha on RaspberryPi with CoDeSys throwing error ^{CODESYS Forge talk (Post)}
I am trying to access Raspberry pi on CoDeSys, but it throws an error says, "No connection to target: An established connection was aborted by the server." I am able to access Raspberry pi via MobXterm, but on CoDeSys, it throws error. Looking for help in resolving this error. Error snap is attached. IP address is scanned here successfully, but when I am trying to install Raspberry pi packet: 4.0.0.0, it throws this error.
Last updated: 2024-08-23

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