Daten über Modbus-TCP lesen, schreiben und weiterverarbeiten ^{CODESYS Forge talk (Thread)}
Daten über Modbus-TCP lesen, schreiben und weiterverarbeiten
Last updated: 2023-06-30

Modbus TCP in der Control Win V3 ^{CODESYS Forge talk (Thread)}
Modbus TCP in der Control Win V3
Last updated: 2013-05-15

Can't Add New Version of Modbus TCP Master ^{CODESYS Forge talk (Thread)}
Can't Add New Version of Modbus TCP Master
Last updated: 2024-04-09

Opto 22 Groov PR2 Modbus TCP Master communication ^{CODESYS Forge talk (Thread)}
Opto 22 Groov PR2 Modbus TCP Master communication
Last updated: 2024-05-31

one variable signed to modbus tcp server device and modbus serial device ^{CODESYS Forge talk (Thread)}
one variable signed to modbus tcp server device and modbus serial device
Last updated: 2025-07-17

Modbus Slave RTU in der Applikation abschalten ^{CODESYS Forge talk (Thread)}
Modbus Slave RTU in der Applikation abschalten
Last updated: 2023-11-09

How I can get "Done flag" for "Modbus Slave Channel"? ^{CODESYS Forge talk (Thread)}
How I can get "Done flag" for "Modbus Slave Channel"?
Last updated: 2024-12-19

Issues with Modbus Slave with Raspberry Pi ^{CODESYS Forge talk (Thread)}
Issues with Modbus Slave with Raspberry Pi
Last updated: 2025-03-09

Modbus loses Connection when Slave goes down and never reconnect ^{CODESYS Forge talk (Thread)}
Modbus loses Connection when Slave goes down and never reconnect
Last updated: 2018-01-29

Creating custom device for Modbus RTU slave ^{CODESYS Forge talk (Thread)}
Creating custom device for Modbus RTU slave
Last updated: 2017-11-13

Modbus Slave configuration problem on port 502 ^{CODESYS Forge talk (Thread)}
Modbus Slave configuration problem on port 502
Last updated: 2018-12-17

Modbus Master RTU auf Wago 841 --> ATmega16 Slave ^{CODESYS Forge talk (Thread)}
Modbus Master RTU auf Wago 841 --> ATmega16 Slave
Last updated: 2011-10-05

Compile error when adding ModBus slave device ^{CODESYS Forge talk (Thread)}
Compile error when adding ModBus slave device
Last updated: 2022-10-18

Modbus Master/Slave with iX T12B SC/Nexto XP340 ^{CODESYS Forge talk (Thread)}
Modbus Master/Slave with iX T12B SC/Nexto XP340
Last updated: 2023-01-26

Modbus Slave-Device stürzt nach kurzer Zeit ab ^{CODESYS Forge talk (Thread)}
Modbus Slave-Device stürzt nach kurzer Zeit ab
Last updated: 2017-12-14

Modbus Slave response -> Timeout and Insufficient bytes received ^{CODESYS Forge talk (Thread)}
Modbus Slave response -> Timeout and Insufficient bytes received
Last updated: 2019-08-18

2 Raspberry PIs (Modbus Master + Slave) mit Codesys ^{CODESYS Forge talk (Thread)}
2 Raspberry PIs (Modbus Master + Slave) mit Codesys
Last updated: 2014-08-17

"Raspberry pi SPS" und arduino uno als Modbus Slave ^{CODESYS Forge talk (Thread)}
"Raspberry pi SPS" und arduino uno als Modbus Slave
Last updated: 2015-09-30

Modbus Master / Slave with 2 Raspberry PIs and Codesys ^{CODESYS Forge talk (Thread)}
Modbus Master / Slave with 2 Raspberry PIs and Codesys
Last updated: 2014-07-29

Some troubles with Modbus RTU Slave on Raspberry Pi 2 ^{CODESYS Forge talk (Thread)}
Some troubles with Modbus RTU Slave on Raspberry Pi 2
Last updated: 2021-11-23

Modbus RTU Master - how to change slave address from program ^{CODESYS Forge talk (Thread)}
Modbus RTU Master - how to change slave address from program
Last updated: 2020-02-10

Post by egr99 on Modbus TCP Server connection is ESTABLISHED but all holding registers are value 0? ^{CODESYS Forge talk (Post)}
Hi there, Read the above description and experienced the same: Reading coil/discrete input/input register/holding register doesn't fill the mapped I/O variable. Any suggestions? Defined (see attachment): - Ethernet (with parameters according to the used Ethernet adapter of my Windows 11 laptop) - -Modbus TCP Client - - -LOGO231 as Modbus TCP Server - - -WS242 as Modbus TCP Server (WaveShare Modbus TCP <-> RTU converter) - - - -WS242_01 as Modbus Server, COM port (slave-id 1 RTU) - - - -WS242_03 idem (slave-id 3 RTU) - - - -WS242_11 idem (slave-id 11 RTU) Writing coil/holding register works from a mapped I/O variable works fine. Verification of Modbus traffic with WireShark: QUERY to and the RESPONSE of all slave-ids are correct Status of all defined is CONNECTED, RESPONSE_SUCCESS, RUNNING etc. Request counters increase with expected frequency. Error counter = 0. (To have all counters works fine I had to change Modbus TCP Client's parameter OptimizationON to FALSE). LOGO231 works fine: values in mapped I/O conform expectation WS242 without Modbus Server, COM port and with defined channels (for only 1 slave-id possible) works fine. PLC Settings: Update I/O while in stop: I see xBusy changing from FALSE to TRUE and vice versa. Always update variables: Enabled 1
Last updated: 2026-04-05

Post by wagomikep on Number of Connections to Modbus TCP Slave ^{CODESYS Forge talk (Post)}
Hello, Is there a maximum number of Masters that can connect to a Modbus Slave that is configured in the device tree? Is this limited by the CODESYS IDE, or the manufactures hardware and CPU load? Thank you,
Last updated: 2024-08-01

Post by wagomikep on Number of Connections to Modbus TCP Slave ^{CODESYS Forge talk (Post)}
Hello, Is there a maximum number of Masters that can connect to a Modbus Slave that is configured in the device tree? Is this limited by the CODESYS IDE, or the manufactures hardware and CPU load? Thank you,
Last updated: 2024-08-01

Post by wagomikep on Number of Connections to Modbus TCP Slave ^{CODESYS Forge talk (Post)}
Hello, Is there a maximum number of Masters that can connect to a Modbus Slave that is configured in the device tree? Is this limited by the CODESYS IDE, or the manufactures hardware and CPU load? Thank you,
Last updated: 2024-08-01

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