00196044-05 - sg x und x4i fse_en.pdf - 第117页
Communication and Control Communication DP Drives, C&P20A and CPP Head CAN Bus S tudent Guide (FSE) SIPL ACE X Series and X4I Edition 01/2009 EN Communication and Control 11 7 4.3.7 Communication DP Dr ives, C&P2…
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
Communication and Control
Communication DP Drives, C&P20A and CPP Head CAN Bus
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Communication and Control
117
4.3.7 Communication DP Drives, C&P20A and CPP Head
The TQM module on the head interface C500 communicates via the CAN Bus (1M/Bit/s) with the station
computer.
The communication to the C&P20A or CPP head is via an additional CAN Bus, which sends the data
with 500 KBit/s.
The DP axes are controlled via the DP master (SCS). 4 actions are performed by the machine control at
the same time:
Starts a certain rotary axis after pickup/placement (pickup angle/placement angle)
Starts a certain rotary axis after Vision (correction angle)
Waits for a certain rotary axis before Vision (positioning command not allowed)
Waits for a certain rotary axis before pickup/placement (positioning command not allowed)
4-27: CAN Bus-controlled head functions on the C&P20A head
Communication and Control
CAN Bus Communication CPP Head
Student Guide (FSE) SIPLACE X Series and X4I
Communication and Control Edition 01/2009 EN
118
4.3.8 Communication CPP Head
4.3.8.1 Communication to the DP Drives
4.3.8.2 CAN Bus Communication to the DP Drives
The data is supplied via the head CAN bus, from the head interface to the intermediate distributor.
The four CAN bus commands are identical to those for the C&P20A head:
Starts a certain rotary axis after pickup/placement.
Starts a certain rotary axis after Vision.
Waits for a certain rotary axis before Vision.
Waits for a certain rotary axis before pickup/placement.
The DP drives are controlled via a common
hardware component, the SCS (Single Core
Solution). This consists of two boards, the power
and the control modules, with a microprocessor for
the sequence control.
The control data is sent from the head processor
and is then transmitted via the head CAN bus.
The communication with the light barrier Z down is
via a separate interface, directly to the power
module. This is necessary as a light barrier Z down
is integrated into each segment.