7BChapter Four: Operation
76BDevice Configuration Object
71
Device Configuration Object
Support added in firmware version AF (1.009). Not valid for previous versions.
The Device Configuration Object (Class Code 6D
hex
) contains the attributes for selecting the poll
response that is returned with I/O poll messaging connections. One instance of the Device
Configuration Object is supported with three instance attributes (Table 40) and three DeviceNet
common services (Table 41, page 71).
Device Configuration Object Instance Attributes
Table 40: Device Configuration Object Instance Attributes
Attribute
ID # (hex)
Description
Data
Type
User
Mode
Access
Cal
Mode
Access
Non-
Volatile
Memory
Data
Variable
Factory
Default
Setting
01 Produced
Assembly Instance
USINT RW* RW*
Y Assembly
Instance
2
02 Consumed
Assembly Instance
USINT RW* RW*
Y
0
0
03 Poll_Auto_Delete_
Enable
BOOL RW* RW*
Y
1
(enabled)
* Attribute ID #01 cannot be set if the Allocate Master Slave service has been issued and the poll
connection is in the established state.
Poll_Auto_Delete_Enable
Setting this attribute determines the behavior implemented when the poll IO
watchdog_timeout_action is set to a value of 0x00 (transition to timeout). The common practice
is to allow the object to delete the poll connection upon the poll connection timing out. The
factory default for this attribute is therefore 0x01, enabled. To utilize a more rigid enforcement of
the connection, the attribute may be set to a value of 0x00, disabled. When this attribute is set to
disabled and, upon the poll IO connection timing out, the device will transition to a timed out
state (the red Network status LED will blink) and the connection must be reset or deleted over the
network to clear the condition.
Device Configuration Object Supported Services
The Device Configuration Object is supported by the two DeviceNet common services listed in
Table 41. Refer to
Supported Service Summary
, page 103, for more information.
Table 41: Device Configuration 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 the object
attribute.
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