Check out this sample to learn how to send online services from a plugin to read or set the RTC on a PLC

Preparations

• Open the file "Example_GetSetRtc.cs" and add the code to one of your plugins.
• Add a button or command that lets you trigger the code later on
• Browse to your local directory for the CODESYS Control Soft PLC (e.g. C:\Program Files (x86)\3S CODESYS\GatewayPLC)
• Right-click on the attachment "CmpTemplate.dll" and save it to this directory.
• Open the file "CODESYSControl.cfg" and add the component "Component.xxx=CmpTemplate" ("xxx" is the next unused component number!).
• Save the configuration file.
• Right-click on the file "CODESYSControlService.exe" and create a shortcut
• Right-click on the shortcut and add "-d" behind the target:
  "C:\Program Files (x86)\3S CODESYS\GatewayPLC\CODESYSControlService.exe" -d

Executing the example

• Start your patched PLC by double-clicking on the shortcut created above
• Open or create a project in CODESYS with a device matching the CODESYS Control PLC.
• Scan for your patched PLC and set the active path.
• Select the PLC in the navigator tree
• Trigger the methods "GetRtcTime" and "SetRtcTime".

Please note: Running this on your local CODESYS Control (x86) will lead to unexpected results - which is good as you don't really want to fumble with your Windows PC clock. When executing "GetRtcTime" most likely you will see a value around 1.1.1970. When executing "SetRtcTime", this will most likely fail. But when you transfer this example to a PLC on an embedded operating system, you should get good results.