# Typical Acquisition and Inspection Sequence

A typical sequence involves constant communication between the vision system and the Automation Controller. This section describes a typical acquisition Acquisition is the process or result of the vision system acquiring a new image. and inspection sequence characteristic of Ethernet/IP and PROFINET protocols, therefore, the control signals originate from the Automation Controller. For SLMP, this sequence is different.

The following diagram shows a high level representation of a typical sequence. The sequence starts after the vision system comes online with the appropriate industrial protocol and the Automation Controller can reach the vision system.

Step | Description
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1 | The Automation Controller initiates a cyclic connection to the vision system. At regular intervals, the Automation Controller sends control signals and requests status signals from the vision system. The vision system can send, for example, acknowledgement and inspection results in the status block at these intervals.
2 | The Automation Controller triggers an acquisition sequence.
3 | The vision system receives the trigger and begins the image acquisition.
4 | The vision system signals that it is not ready to accept another trigger.
5 | The image acquisition occurs. Depending on the trigger type and the results buffer, the vision system acquires one or more images.
6 | The inspection sequence begins after the image acquisition is complete.
7 | The vision system signals that the acquisition is complete in the next status block after the acquisition.
8 | The vision system signals that the inspection is complete and sends the inspection results.