The Stop and Abort methods offer two different means of finishing operation in the “Executing” states, with the intention that the system transitions to the Ready state.

Both can be considered intended interruptions of a running system, in contrast to an error or the complete stopping of operations by Reset and Halt methods.

The difference between the two methods is:

• In response to an Abort method call, the system is expected to end running operation and transition to the Ready state as fast as possible, without regard to acquired or computed data.
• In response to a Stop method call, the system is expected to end running operation and transition to the Ready state as soon as possible while retaining as much result data as possible. It is expected that results will become available for all images acquired before the Stop method was called.

These methods shall always be executable. If for some reason the vision system is not capable of carrying out this transition, the method shall fail with an appropriate status code, typically Bad_InternalError, and the state machine shall transition into the Error state.

For example, depending on the camera / sensor used, it may not be possible to interrupt the acquisition process arbitrarily from the outside.