GE Industrial Solutions OKCV3000CN DeviceNet - Manual (Page 7)

DeviceNet
INTRODUCTION
1.1. ABOUT THIS MANUAL
This manual describes DeviceNet features of the DGF card (DGFC)C:
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how DGFCs can be connected together, without the need of any other node (LocalBus);
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how the DGFC can be configured (Explicit Messages);
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how the DGFC can be connected to a PLC (Predefined Master/Slave Connection Set, or Predefined Mode)
1.2. ASSUMPTION ABOUT YOU
We assume that you already knows DGFC hardware and DBASE informations.
If you want to use LocalBus, Bricks and Win+Drive tools knowledge is also required.
1.3. TERMINOLOGY
1.3.1.
...
about DeviceNet
DeviceNet:
CAN:
MACID:
Duplicate MACID Check:
Bus Off:
Object:
Attribute/Service:
Object modeling(or profile):
Predefined master/slave connection set:
Client:
Server:
is a serial protocol, object oriented, CAN based;
the Controller Area Network is a communication protocol. It defines:
1) a Media Access Control (MAC) methodology;
2) Physical signaling;
CAN does not specify the entire Physical Layer and/or Medium upon
which it resides, or the Application Layer protocol used to move data.
Methods for making physical connections, providing power, applying
CAN signaling are defined by DeviceNet specifications.
the Media Access Control IDentifier is the address;
is a special check that does not allow a node with the same MACID of
another to place itself on-line;
when an abnormal rate oferror occurs the CAN chip places itself off-line;
is an abstract representation of a component present in a device;
in first approximation, we can say they are the visible data and proce-
dure of an object;
is a set of objects that describes how a device acts;
is a subset of DeviceNet rules (only one master allowed);
is the node that originates the transmission
is the node that reacts to the transmission. The Server’s reaction may
cause it to return a message to the Client.
Kiln
INTRODUCTION