VIPA 300S SPEED7 - CP, Руководство пользователя

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Manual VIPA System 300S SPEED7
Chapter 4 Deployment
HB140E - CP - RE_342-1CA70 - Rev. 09/46 4-17
Message structure
All CANopen messages have the following structure according to
iA DS-301:
Identifier
Byte Bit 7 ... Bit 0
1 Bit 3 ... Bit 0: most significant 4 bits of the module-ID
Bit 7 ... Bit 4: CANopen function code
2 Bit 3 ... Bit 0: data length code (DLC)
Bit 4: RTR-Bit: 0: no data (request code)
1: data available
Bit 7 ... Bit 5: Least significant 3 bits of the module-ID
Data
Byte Bit 7 ... Bit 0
3 ... 10 Data
An additional division of the 2byte identifier into function portion and a
module-ID gives the difference between this and a level 2 message. The
function determines the type of message (object) and the module-ID
addresses the receiver.
CANopen devices exchange data in the form of objects. The CANopen
communication profile defines two different object types as well as a
number of special objects.
The VIPA CAN master for SPEED-Bus supports the following objects:
•
40 Transmit PDOs (PDO Linking, PDO Mapping)
•
40 Receive PDOs (PDO Linking, PDO Mapping)
•
2 Standard SDOs (1 Server, 127 Clients)
•
1 Emergency Object
•
1 Network management Object NMT
•
Node Guarding
•
Heartbeat
Note!
The exact structure and data content of all objects is described in the CIA-
Profiles DS-301, DS-302, DS-401 and DS-405.
Identifier
Data