7BChapter Four: Operation 72BDeviceNet Object
57
Data Rate Switch Adjustment
Refer to Data Rate Switch, page 40, for complete information on adjusting this switch.
Note
In order to control the data rate directly from the switch, ensure the switch is set to
an actual value at power up, and not to the network (PGM) position.
When this condition is met, any changes to the data rate made through the
network are denied and the Attribute_Not_Settable General Error Code is returned
to the Set_Attribute_Single service.
Bus-Off Interrupt
Attribute ID #03 defines the bus-off interrupt for the device in accordance with the ODVA
“DeviceNet Specification,” Volume I [1].
Allocation Information
Attribute ID #05 reports how the ty
pes of messages supported by
the device are allocated as
specified by the Predefined Master/Slave Connection Set [1].
DeviceNet Object Supported Services
The DeviceNet Object is supported by
the four DeviceNet comm
on services listed in Table 24.
Refer to Supported Service Summary, page 103, for more information.
Table 24: DeviceNet Object Supported Services
Service
ID # (hex) Service Name
Parameter
Data Type(s)
Service
Type Description
0E Get_Attribute_Single USINT Request Reads the object attribute.
10 Set_Attribute_Single USINT,
Attribute
Data Type
Request Modifies object attribute.
4B Allocate_Master_Slave BYTE,
USINT
Request Allocates the Predefined
Master/Slave Connection Set.
4C Release Master Slave BYTE Request Releases the Predefined
Master/Slave Connection Set.
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