00196044-05 - sg x und x4i fse_en - 第118页
Communication and Control CAN Bus Communication CPP Head S tudent Guide (FSE) SI PL ACE X Series and X4I Communication and Control Edition 01/2009 EN 11 8 4.3.8 Communication CPP Head 4.3.8.1 Communication to the DP Driv…
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.
Communication and Control
Communication CPP Head CAN Bus
Student Guide (FSE) SIPLACE X Series and X4I
Edition 01/2009 EN Communication and Control
119
4.3.8.3 EEPROMs on CPP Head
EEPROMs are present on all boards (except E/D transformer). Various data are stored there, according
to the individual functions e.g. production date, material number, zero point correction values, offset
values, plus operating and statistical data.
4.3.8.4 Data Transfer
The communication with the DP drives (CAN bus) is contactless via a transmitter unit (on the back
cover of the CPP head) and a receiver unit (on the valve terminal).
This communication is via 2 channels, whereby channel 1 is responsible for supplying data to the
DP drives and channel 2 is responsible for communication to the Z down light barrier of the axis card
(HCU).
The head CAN bus is – in this case – not used as a differential CAN bus with the CAN_L and CAN_H
signals but as a 1 wire CAN on the rotor.