Reading the PLC Log CODESYS provides the capability of displaying the events and error messages which are logged in the controller. Reading the log Requirement: The PLC is running. In the device tree,

Updating an Application on the PLC CODESYS basically provides two options to transfer a modified application to the controller: download and online change. A download results in a recompilation of the

Performing an Online Change CODESYS automatically offers you an online change if you login with an application that is already present on the controller, but has been changed since the last download i

Execution of a download A download of the application causes a compilation of the active application. In that time, a syntax check is performed and application code is also created and downloaded to t

Copying Files to/from the PLC In the generic Files tab of the device editor, you can copy files to and from the local file system and the PLC. Requirement: The manufacturer has unlocked the tab. In th

Security for the Development System In CODESYS , you can apply access protection to projects, libraries, as well as individual applications. In addition to a simple write protection for a project, a u

Security for CODESYS WebVisu Protect the connection between the web server of the controller and the visualization client with the following measures against unwanted access: Configure an HTTPS connec

What to do when... :

Certificate Expired If the certificate from the controller for encrypted communication has expired (valid from "not before" until "not after"), you get a prompt with a corresponding message in CODESYS

New Certificate (while the current one is still valid) A new certificate can be issued before the existing certificate expires. This makes it possible for the encrypted communication to continue seaml