Post by repc2026 on Codesys MODBUS RTU devices ^{CODESYS Forge talk (Post)}
I am trying to use Codesys to connect by Modbus RTU to an Arduino UNO, I add the Modbus COM Port but when I try to add the master and the slave I don't have these options, I attach an image of the device manager. I am using Codesys 3.5 SP21.
Last updated: 2026-07-13

Engineering Dissertation Help & Assignment Assistance. ^{CODESYS Forge talk (Thread)}
Engineering Dissertation Help & Assignment Assistance.
Last updated: 2026-07-13

Reset device password Festo PLC ^{CODESYS Forge talk (Thread)}
Reset device password Festo PLC
Last updated: 2026-08-13

Runtime 🇬🇧 ^{CODESYS Forge talk (Discussion)}
Related questions to SoftPLCs e.g. Raspberry Pi, Beaglebone, IoT2000 and other platforms
Last updated: 1 hour ago

Could not write options file at... ^{CODESYS Forge talk (Thread)}
Could not write options file at...
Last updated: 1 hour ago

Visu 4.9.1 auto-logon/login ^{CODESYS Forge talk (Thread)}
Visu 4.9.1 auto-logon/login
Last updated: 2026-01-14

Ansteuerung M-Bus Beckhoff KL6781 ^{CODESYS Forge talk (Thread)}
Ansteuerung M-Bus Beckhoff KL6781
Last updated: 2026-01-21

SP19 Runtime Zugriff auf lokales Dateisystem ^{CODESYS Forge talk (Thread)}
SP19 Runtime Zugriff auf lokales Dateisystem
Last updated: 2026-01-22

Finding out exception code position ^{CODESYS Forge talk (Thread)}
Finding out exception code position
Last updated: 2026-01-27

information security of CDS IDE 3.5.15.30 ^{CODESYS Forge talk (Thread)}
information security of CDS IDE 3.5.15.30
Last updated: 2026-01-29

Font Underline on webvisu not shown ^{CODESYS Forge talk (Thread)}
Font Underline on webvisu not shown
Last updated: 2026-01-29

Error, visualisation property handling, VISU_USEPROPERTYINFO ^{CODESYS Forge talk (Thread)}
Error, visualisation property handling, VISU_USEPROPERTYINFO
Last updated: 2026-02-03

SysProcessCreate stopped working after SP21? ^{CODESYS Forge talk (Thread)}
SysProcessCreate stopped working after SP21?
Last updated: 2026-02-03

IO Drive on C manual ^{CODESYS Forge talk (Thread)}
IO Drive on C manual
Last updated: 2026-02-03

Creating Boot Application not working ^{CODESYS Forge talk (Thread)}
Creating Boot Application not working
Last updated: 2026-02-06

Lenze i950 Servo and WAGO PFC200 ^{CODESYS Forge talk (Thread)}
Lenze i950 Servo and WAGO PFC200
Last updated: 2026-02-13

CAM Motion Recover after STO ^{CODESYS Forge talk (Thread)}
CAM Motion Recover after STO
Last updated: 2026-02-16

Modbus connection via Qronox PCD3 M6893 ^{CODESYS Forge talk (Thread)}
Modbus connection via Qronox PCD3 M6893
Last updated: 2026-02-19

Unable to install previously installed version ^{CODESYS Forge talk (Thread)}
Unable to install previously installed version
Last updated: 2026-02-20

Issue calling methods in CFC ^{CODESYS Forge talk (Thread)}
Issue calling methods in CFC
Last updated: 2026-03-06

"Invalid Value" for Variables at Runtime ^{CODESYS Forge talk (Thread)}
"Invalid Value" for Variables at Runtime
Last updated: 2026-03-09

Post by mascara on CloseTargetVisu ^{CODESYS Forge talk (Post)}
Thank you, it worked perfectly.
Last updated: 2026-03-11

Gateway in China - "Gateway not connected" ^{CODESYS Forge talk (Thread)}
Gateway in China - "Gateway not connected"
Last updated: 2026-03-18

Compare applications in one project ^{CODESYS Forge talk (Thread)}
Compare applications in one project
Last updated: 2026-03-19

Virtual Keyboard Support on Login Page ^{CODESYS Forge talk (Thread)}
Virtual Keyboard Support on Login Page
Last updated: 2026-03-22

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