00196044-05 - sg x und x4i fse_en.pdf - 第115页

Communication and Control Communication SIPLACE Vision CAN Bus S tudent Guide (FSE) SIPL ACE X Series and X4I Edition 01/2009 EN Communication and Control 11 5 4.3.6 Communication SIPLACE Vision 4-25: Overview SIPLACE Vi…

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Communication and Control
CAN Bus CAN Bus Communication with Axis Controller
Student Guide (FSE) SIPLACE X Series and X4I
Communication and Control Edition 01/2009 EN
114
4.3.5 CAN Bus Communication with Axis Controller
The communication between the axis controller modules is now achieved using the CAN Bus. All the
information exchanged between these modules is transmitted via the CAN bus (e.g. axis parameter,
target position, end position signal, ...).
4-24: Overview axis controller
Communication and Control
Communication SIPLACE Vision CAN Bus
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Communication and Control
115
4.3.6 Communication SIPLACE Vision
4-25: Overview SIPLACE Vision
The communication between the computers is via LAN cables. The station computer sends the
commands for image acquisition to the Vision computer and receives the measurement result. The
station computer also sends the illumination values for the respective component shapes. The images
recorded are transferred digitally via the Vision board to the hotlink adapter, using the spread spectrum
and are then sent via the hotlink connection to the Vision computer, for evaluation. The result is sent to
the station computer.
Communication and Control
CAN Bus Communication SIPLACE Vision
Student Guide (FSE) SIPLACE X Series and X4I
Communication and Control Edition 01/2009 EN
116
4.3.6.1 Communication During Image Acquisition
The main communication between the Vision system and station computer is the transmission of
illumination values. These values, stored in the CS, are sent via CAN bus to the camera in question. As
soon as the camera should take the picture, the camera illumination is activated by a trigger. From this
moment on the row of LEDs which provides the different illumination levels shines according to the
illumination value. This illumination value can have 0 = dark up to 255 = bright. All illumination levels start
lighting at the same moment. The value 0-255 determines the length of the illumination time.
The maximum length of illumination is limited to 6 ms.
4-26: Time sequence from up to down for image acquisition communication