Sigma – Working on Multi-Stage Control Objects Can Cause Controller Lock-Up

[Product_Support]

Issue

Editing Multi-Stage control objects in Sigma may cause the controller to lock up unexpectedly.

Product Line

Satchwell BAS & Sigma

Environment

Satchwell Sigma

Cause

The precise root cause of the controller lock-up is currently undetermined. However, it has been observed that certain conditions during editing can trigger this behavior.

Resolution

To mitigate the risk of controller lock-up when working with Multi-Stage control objects, follow these best practices:

1. Download the Complete Object File Periodically

   • Before and during editing sessions, ensure you download the full object file to maintain a stable configuration and reduce the risk of corruption or lock-up.

2. Disable Contingency Logging Temporarily

   • If contingency logging is enabled on the Multi-Stage control object, disable it before making any changes. This has been shown to reduce the likelihood of controller instability.