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8 Communication and Control 8.2 Control Area Network (CAN Bus) Technical Training E by DEK 12/2017 71 8.2 Control Area Network (CAN Bus) Why CAN? ● Reduced wiring ● Future proof – ease of adding options ● CAN open specif…
8 Communication and Control
8.1 M36
70 Technical Training E by DEK 12/2017
Next Move Interface Card
1. TP 1 + LED 1 = 24V US 4. TP 4 + LED 4 = -12V
2. TP 2 + LED 2 = 24V SW 5. TP 5 + LED 5 = +5.5V
3. TP 3 + LED 3 = +12V 6. TP 6 =DGND
The NextMove Interface Card displays the machine voltages status.
The voltages can be measured at the Test Points.
Next Move ES 7 Segment Display
7 Segment DISPLAY Meaning
- (minus) followed by . (point) If this stays on the display it indicates a 'Fail to Boot'
Possible reasons Corrupt firmware or a low +5.5V
1 Initialized and normal function
E Error missing communication to Machine PC
8 Communication and Control
8.2 Control Area Network (CAN Bus)
Technical Training E by DEK 12/2017 71
8.2 Control Area Network (CAN Bus)
Why CAN?
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Reduced wiring
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Future proof – ease of adding options
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CAN open specification allows multiple manufactures to be sourced
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Short reaction times for priority commands
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Fault analysis built into architecture – ability to recover
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Simplicity of interface (mechanical and electrical)
CAN Features
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Uses line topology: participants are connected parallel via bus (DEK)
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Data transmission speed of 500 Kbit/sec (DEK)
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Data exchange: Each device (Node) may send data if bus is not occupied
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COB´s are read by all nodes but any action is only performed by the addressed Node(s)
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A COB-ID (COB identifier) determines the receiving Nodes address and the priority of the
message
Nodes Positions in Machine
8 Communication and Control
8.2 Control Area Network (CAN Bus)
72 Technical Training E by DEK 12/2017
Overview Nodes Functions
List of nodes in the order they appear in the CAN bus chain
Node 1 Nextmove ES
Node 2 Main Machine I/O
Node 3 Print Carriage I/O
Node 4 Screen Cleaner I/O (optional)
Node 6 Rising Table
Node 7 Print Carriage Motor
Node 8 Camera X Motor (710)
Node 9 Camera Y Motor (710)