Siemens E12 manual Result output by means, Recognition principles of edges

Industry Automation and Drive Technologies - SCE

3.2Performance Features

•Incident light method with LED ring lamp

•Object recognition with object search and object check

•Startup by means of setup support at the PG/PC with installed Internet Explorer

•Up to 20 object checks per second

•Up to 64 objects to be checked can be stored

•To sort the objects to be checked, 2 digital outputs are provided: OK, N_OK

•Operator interface is completely Web-based

•Extensive operating and monitoring functions also in the evaluation mode

•Extensive diagnosis functions and logging functions

•Firmware update by means of the operator interface of the Web browser

•Control by means of digital I/O, PROFIBUS DP and PROFINET IO

Result output by means of

–PROFIBUS DP

–PROFINET IO

–RS232 interface of an RS232 Ethernet converter

–TCP/IP connection of the PC/PG

3.3Function

Checking the properties of an object to be checked for correctness

64 models are provided to recognize objects to be checked. The SIMATIC VS120 checks whether the individual characteristics of the object to be checked are shaped as the trained model is.

When specifying the recognition and evaluation area, glossy areas on the objects to be tested are to be avoided.

Recognition principles of edges

To recognize image patterns, edges are used. These edges in the images are transitions from light to dark or vice versa. A model is generated from the sum of edges extracted in the picture, and from their arrangement.

Recognizing and localizing parts

The SIMATIC VS120 recognizes objects to be checked and determines the coordinates including the rotational position and forwards them -for example, by means PROFIBUS DP- to a control system like the S7.

Checking a model for completeness

In addition, the SIMATIC VS120 checks the objects in question for completeness. Deviations from the trained model are detected, and the quality values of the evaluation are displayed.

Sorting functions of models in model sets

Depending on the importance of the application, it is possible to group and store 15 model sets for evaluation with 64 possible models. When evaluated with the SIMATIC VS120, the models are sorted -according to the application- with a control system.

TIA Training Document	Page 8 of 47	Module
E12
Status: 01/2010	Vision Sensor Shape Check with SIMATIC S7-300F 2PN/DP and VS120