Citect 7.2 client freezing

Please work with your Technical Support teams so that logs can be captured and provided for analysis. The system should not be freezing up. It almost sounds like "Bad Tags", meaning that Tags exist in SCADA but not in the PLC. Also want to make sure you are using the latest Service Pack / update for his version. Suggest adding a redundant server, so should a freeze occur on the Primary, the clients would fail back over to the Standby, plus then you could identify if it is actually this PC Node that is also faulty (Faulty hardware, NIC Card, Board, etc.) Tech Support can quickly identify the location of the freeze.

Thank you Nathan, I have contacted tech support, and they won't support version 7.2 but mentioned about similar things.

The frozen or not responding client is often caused by the Citect main thread being blocked. You need reviewing your project configuration.

• SQL Cicode functions without sleeps
• ActiveX control

In addition, perform kernel dumps before and after the issue occurs. You need taking a look at the kernel dump files and identify anything abnormal. You can start with

• Master Control Block
• Table Master_Table
• Other tables, such as Cicode

Hope this would help.

Thank you Jacky