Hi!

I have the following configuration:

PLC: CPU 1513-1 PN v1.8 programmed in TIA Portal V14 SP1

SCADA: WinCC 7.4.1.0 on Windows 7 and on Windows 10 (two different PC's but this is not important, because described bug is the same on both Windows versions)

In PLC I've created several Program_Alarm with associated value (link to the text library), and I've loaded these messages to WinCC ("Load from AS"). In runtime everything works as it should. But when I restart WinCC - pending AS messages disappear from message list (does not matter acknowledged or not) and in short-term archive list they appear with strikethrough date and time and in messages there is no text from text library. When new messsage arrived - it appears in message list as it should.

I tried to set option "Reload of message list after power failure" in Archive configuration but nothing changes.

Same thing happens in PLC Sim and in real PLC.

Any help would be appreciated

It may be that you just have to install an Update for WinCC.

Improvements in Update 1

Runtime
Alarm Logging: Display of pending AS messages after activation of WinCC Runtime.

Pay attention that WinCC projects are not compatible between PC with Update and without the same update.

(I thought this incompatibility would concern only Service Packs, but in WinCC 7.4 it seems that Update also do a big change to the project)

I have WinCC 7.4 with SP1. 7.4.1.0.

I thought that SP1 includes previous updates... And now I can't install them. What should I do? Completely remove WinCC and install updates before SP1?