Hi,
I suppose you are using the latest version.
RevPi Bookworm 64-bit (Default)
Revolution Pi Library for CODESYS v2.2.0.0
CODESYS Control for Linux ARM64 SL v4.16.0.0

It is important that the RevPi device (Connect SE) be at the root of the device tree. Any other devices, e.g., Ethernet devices ...

Hi,
Yes, you can use different serial ports (USB for RS232 and onboard for RS485) at the same time in CODESYS, as long as each serial port is mapped to a unique device file (for example /dev/ttyUSB0, /dev/ttyUSB2, /dev/ttyUSB3).

Each instance of the serial COM Port (SysCom in CODESYS) requires a ...

Hi,
The problem is likely caused by the Ethernet interface being placed before the RevPi Connect 4 device in the CODESYS device tree.

You can also disable GPIO access if you are using the RevPi LEDs.
CODESYS_issue.png


Corrected project configuration:
CODESYS_correct.png

I would recommend ...

Hello Rossano,
Thank you for the confirmation. We have released the same version that you tested.

https://revolutionpi.com/en/support/downloads

Archive CODESYS Drivers
Revolution Pi Library for CODESYS V1.4.2.0

The Revolution Pi Library for CODESYS V2.2.0.0 (CODESYS Development System V 3.5 SP21 ...

Hello Rossano,
Please test the revolutionpibridge-V1.4.2.0-beta library package.
The library is compiled for CODESYS 3.5 SP19 and can be used with SP21.

https://packages.revolutionpi.com/buster/download/revolutionpibridge-V1.4.2.0-beta.zip

It can be used with the discontinued CODESYS Control for ...

Hi PAHO,
Can you please test with the attached sample example?
Connect4_DIO_Test.zip

The program sets the first 8 outputs of the first DIO module and the first 4 outputs of the second DIO module starting from the left of piBridge.

CODESYS_FE65mDjfPX.png

The following pictory configuration ...

/dev/ttyRS485 in pictory is symbolic link to /dev/ttyUSB0


The port number 0 should not be mentioned in /etc/CODESYSControl_User.cfg . Actual entry therefore is
Now /dev/ttyUSB0 corresponds to COM port 1 in CODESYS for Connect /S

Hello Wolfgang and PVCS,
Modbus RTU with Connect 4 on 64 bit image shall work with following settings :

Configure COM port default interface for Connect4 in /etc/CODESYSControl_User.cfg
running CODESYS Control for Linux ARM64 SL


[SysFile]
PlaceholderFilePath.1=/etc/revpi, $configrsc$

[SysCom ...

Hello Wolfgang,
Please follow the similar topic posted on the english forum.

viewtopic.php?t=4345

Viele Grüße, Amar

Hello PVCS,

Under General->Serial Port Configuration tab of MODBUS_COM device in codesys tree
COM Port selected will be as follows

/dev/ttyUSB0 -> COM Port 1
/dev/ttyUSB1 -> COM Port 2 ...
/dev/ttyUSBn -> COM Port n

In /etc/CODESYSControl_User.cfg you can try configuring following:

[SysCom ...