The Marquee Driver uses an IPC datagram queue to receive alarm messages. The default size for this queue is 10. This default is acceptable for bursts of 50 alarms during testing, however system loading will change performance.
If you find an IPC datagram queue overflow message in the Status Log for a Marquee Driver process, you can increase the size of the IPC queue.
To increase the size of the queue:
In your project's CIMPLICITY Workbench, select Command prompt on the Tools menu.
In the Command Prompt window, enter the following commands:
Type the following line at the end of the log_names.cfg file in Notepad:
<number> is the new queue size.
Exit Notepad and save the file.
Exit the Command Prompt window and return to the CIMPLICITY Workbench.
Before you restart your project, select Configuration Update from the Project menu or click the Configuration Update button on the toolbar to update your run-time configuration.
Marquee Driver global parameters.