DeviceNet is a CAN -based field bus which is used mainly in automation technology. DeviceNet was developed by Allen -Bradley ( Rockwell Automation is one ) develops and later passed as an open standard to the ODVA () ( Open DeviceNet Vendor Association ). DeviceNet is mainly distributed in the U.S. and in Asia. In Europe, DeviceNet or CANopen Profibus has opposite can not be said.
Number of network nodes
A maximum of 64 network nodes per fieldbus segment. In almost all DeviceNet devices on the market, you can set the node address (0 to 63 ) using rotary or DIP switches on the unit. In the specification, however, the possibility is provided to configure the node address on the bus. For this, there are some devices a special switch position, which is labeled with P or PGM.
Three different baud rates are selectable: 125 Kbps, 250 Kbps and 500 Kbps. In almost all DeviceNet devices on the market, you can set the baud rate via rotary or DIP switches on the unit.
Common Industrial Protocol
DeviceNet uses on the lower layers ( 1-4 ) of the OSI model is essentially the CAN specifications with some additional restrictions / additions. Thus, for example, DeviceNet not admitted, all known CAN baud rates. In the upper layers ( 5-7 ), DeviceNet uses the " Common Industrial Protocol" defined by ODVA (short CIP). DeviceNet is so the implementation of CIP based on CAN. CIP is also used for the EtherNet / IP fieldbus used (Ethernet / IP is the implementation of CIP on the basis of Ethernet).