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Post by bruno-roth on 22kW Wallbox mit Modbus ^{CODESYS Forge} ^talk ^(Post)
Hallo, das ist wohl das falsche Forum für Wallboxen :-) Aber ich empfehle dir Die GO-E-Charger die hat eine sehr offene Schnittstelle und API auch mit Modbus TCP https://github.com/goecharger/go-eCharger-API-v2/blob/main/modbus-de.md
Last updated: 2025-11-17

Post by mil581 on Modbus TCP Server connection is ESTABLISHED but all holding registers are value 0? ^{CODESYS Forge} ^talk ^(Post)
Hello everyone! I'm facing a weird issue with CODESYS Control Win V3 x64 on a fresh Windows install. The situation is as follows: CODESYS Modbus TCP Server (Slave) is running and I can see live values in the mapping display of Modbus settings: GVL (e.g., 32, 42, 50). Port 502 is LISTENING according to netstat. When connecting via Modbus Poll or Node-RED, the connection status changes to ESTABLISHED and everything reports as fine. The Problem: Despite the successful connection, all holding registers return 0 no matter what. It's like the OS accepts the TCP handshake, the request counter goes up but the data payload never reaches Modbus Client (in this case Node-RED or Modbus Poll). Quick Stats: Firewall: Completely OFF. Unit ID: Verified & Matching. IP: Tried 127.0.0.1 and 192.168.0.1. Interface: Correctly bound in Ethernet Device settings. I already tried absolutely everything from changing IP address, subnet, port, deleting the project and starting new one and even nuking my old Windows install. Since I am near completion of my bachelor thesis only thing left for me to do is connect SoftPLC to NodeRED via Modbus but this issue is driving me crazy for weeks. I do not know what to do anymore.
Last updated: 2025-12-25

<identifier>: POINTER TO <data type | function block | program | method | function>; ^{CODESYS Forge} ^talk ^(Thread)
<identifier>: POINTER TO <data type="" |="" function="" block="" program="" method="">;</data></identifier>
Last updated: 2022-03-23

Post by timvh on Unable to Connect to Modbus RTU Device ^{CODESYS Forge} ^talk ^(Post)
If your Control Win is the Modbus "Master" then your configuration should be something like: Modbus_COM (Serial port) - Modbus Master (this is the Control Win SoftPLC actively setting up the communication) - Modbus Slave (this is then your WAGO 750-315) You need to add channels to the Modbus Slave configuration to inform the master which variables to read/write from the Wago module. The way you configured it now, the Control Win is also a slave. PS, don't forget to put the PLC (Control Win) in Run.
Last updated: 2024-09-03

Post by winki on Modbus TCP & RTU with Control for Linux SL ^{CODESYS Forge} ^talk ^(Post)
Hello, Today I am able to test ma industrial computer in my test bench. I am able to do all the configuration throught my VPN, 100% remote. I can see the gateway & the Virtual PLC. Now I would like to do some Modbus TCP Client & Modbus RS485. But I am lost due to docker ! When I go to modbus TCP it only gave me the docker network, but not my eth0 & eth01 When I go to modbus rtu, how can I create the link between Com number & my /dev/ttyRS485 Loic,
Last updated: 2024-10-23

Data source manager runs id Demo mode ^{CODESYS Forge} ^talk ^(Thread)
Data source manager runs id Demo mode
Last updated: 2022-05-05

Where is data of ENIP getAttributeSingle stored? ^{CODESYS Forge} ^talk ^(Thread)
Where is data of ENIP getAttributeSingle stored?
Last updated: 2023-04-20

Communication between PLC and HMI- sending DUT data ^{CODESYS Forge} ^talk ^(Thread)
Communication between PLC and HMI- sending DUT data
Last updated: 2024-08-23

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