Issue
Attempts to download images or object files to UNC532 controllers only partially complete and then fail. This behavior is often observed in the Sigma debug window.
Product Line
Satchwell BAS & Sigma
Environment
Sigma UNC532
Cause
The UNC532 controller has limited processing capability. When global data broadcast rates are high (e.g., 600 broadcasts per minute), the controller may experience communication timeouts during file transfers. This results in incomplete downloads.
Resolution
To diagnose and mitigate the issue:
-
Check Global Broadcast Rates
Use Wireshark to trace Ethernet backbone communications. Refer to the article:
Using Wireshark to Analyse Communications on an Ethernet Network. -
Reduce Global Data Load
If analysis confirms excessive broadcast traffic, consider:- Segmenting the network
- Reducing unnecessary global points
- Optimizing controller configurations
