A few questions:

1. What is the current PLC Scan (cycle) time?  (Online & diagnostics -> right pane), and what is the range of scan time while you are online and not monitoring any blocks?  When you start monitoring any blocks, does the range of cycle times grow, especially in the "slower" or higher cycle time range?  Like, goes from 5-15 while online, but while monitoring a DB, it goes from 8-50ms.

2. What network devices are connected?  Profinet, ethernet, network switches (managed or unmanaged?), VFDs, scanners, scales, and so on?

3. As the prior poster asked, are you connected directly to the PLC, or through some network device, or remotely via VPN for example?

HessuS

Hi!

I am wondering why I am receiving this message to 1214c CPU diagnostic buffer on every 20 sec..

I have no panels or any other devices installed, only plc (FW 4.5.1).

I have fresh new plc. I have created new project (Tia v17) as always, and i have detected the CPU. Then I did change input and output area, and downloaded the project.

But for some reason, when I checked from online & diagnostics, I'm receiving this error.

Never before.. Though same Tia version, and same type of CPU.

Thankfully, "Help on event" gives a clear solution: A previously established system session was terminated due to CPU operating system security efforts.

I would somehow understand this, if i'd have panel connected.