Sigma - Working on Multi-Stage control objects can cause the controller to lock up.

Issue

Editing Multi-Stage control objects.

Product Line

Satchwell Sigma

Environment

Sigma

Control

Multi-Stage

Multi

Stage

Cause

Multi-Stage control objects cause the controller to lock up when edited.

Resolution

The exact cause of this issue has not been located, but here are two suggestions.

  • Download the complete object file periodically when editing these objects.
  • If contingency logging is enabled on the multi-stage control object, it should be disabled before working on that object.