7BChapter Four: Operation
72BDeviceNet Object
55
DeviceNet Object
The DeviceNet Object (Class Code 03
hex
) contains the attributes for defining the configuration
and status of the physical DeviceNet network connections. Use this object to set or report the
node address (network address), the data rate, and the bus-off interrupt. In addition, use this
object to report how the messaging supported by the device is allocated.
One instance of the DeviceNet Object is supported with one class attribute (Table 22), four
instance attributes (Table 23), and four DeviceNet common services (Table 24, page 57).
DeviceNet Object Class Attribute
Table 22: DeviceNet Object Class Attribute
Attribute
ID #
(hex) Description
Data
Type
User
Mode
Access
Cal
Mode
Access
Non-
Volatile
Memory
Data
Variable
Factory
Default
Setting
01 Revision UINT R R Y none 002
Revision
Attribute ID #01 reports the current revision of the DeviceNet Object definition in the ODVA
“DeviceNet Specification,” Volume I [1].
DeviceNet Object Instance Attributes
Table 23: DeviceNet Object Instance Attributes
Attribute
ID #
(hex) Description
Data
Type
User
Mode
Access
Cal
Mode
Access
Non-
Volatile
Memory
Data
Variable
Factory
Default
Setting
01
Node Address
USINT
RW*
RW*
Y
0 to 63
63
02
Data Rate
USINT
RW*
RW*
Y
0 = 125 Kb
1 = 250 Kb
2 = 500 Kb
0
03 Bus-Off
Interrupt
BOOL R R Y none 0
05 Allocation
Information
Struct of:
USINT
USINT
R R N none
0,
255
* Attribute IDs #01 and #02 can be written only if their corresponding hardware switches (located on
top of the device) are in the network (PGM) position. See
Data Rate and Node Address Switches
, page
39, for more information.
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