Siemens E12 Manual do Utilizador descarregar pdf (Página 8)

Industry Automation and Drive Technologies - SCE

TIA Training Document

Page 8 of 47 Module

E12

Status: 01/2010 Vision Sensor Shape Check with SIMATIC S7-300F 2PN/DP and VS120

3.2 Performance 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

3.3 Function

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.

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