Festo Электромотор MTR-DCI - Manual (Page 28)

1. System overview
1-6
Festo P.BE-MTR-DCI-DN-EN en 1209a
1.2 Fieldbus communication
1.2.1 Data exchange using DeviceNet
DeviceNet was developed by Rockwell Automation and the
ODVA (Open DeviceNet Vendor Association) as an open
Fieldbus standard based on the CAN protocol. DeviceNet
belongs to the class of CIP-based networks. CIP (Common
Industrial Protocol) forms the application layer of DeviceNet
and defines the exchange of the following data:
– Explicit messages with low priority, e.g. for configuration
or diagnosis.
– I/O messages, e.g. time-critical process data
The Open DeviceNet Vendor Association (ODVA) is the user
organisation for DeviceNet. Publications on the DeviceNet/
CIP specifications are provided at
– ODVA (Open DeviceNet Vendor Association)
http://www.odva.org
– CI (ControlNet International )
http://www.controlnet.org
Explicit Messaging Explicit messages consists of a request and a response. This
allows services to be requested or executed directly from a
participant.
Explicit messages contain (target) address, class, instance,
attribute, and attribute value, as well as a service code for
data usage.