Rockwell Automation 2098-DSD-xxx Ultra3000 Digital Servo Drives with DeviceNet - Manual (Page 28)

Publication 2098-RM004A-EN-P – August 2002
2-12 Programming Reference
In addition, you can send Explicit Messages to the Input and Output
Assemblies. Explicit Message writes to an Output Assembly can
perform control functions. Therefore, Explicit Message writes are only
allowed when the Master (scanner) is not actively controlling the drive
via I/O Messaging and the message write is done through a
connection with a time-out value not equal to zero. After a write, any
time-out or closure of the connection may cause the drive to fault.
Refer to Using Explicit Messaging to Control the Ultra3000. This
document may refer to Input and Output Assemblies as response and
command Assemblies respectively.
IMPORTANT
If the above parameters are modified, you must
perform one of the following before the modified
value(s) are active:
•Close any existing I/O messaging connection(s)
•Power cycle the drive
•Reset the drive
•Remove and reapply DeviceNet power to the drive.
Assembly Object,
Attributes of Instance ID = 0 (Class Attributes)
Attr. ID Access
Rule
Attribute
Name Data
Type Description Semantics
of Values
1 Get Revision UINT Revision of this
object. The current value
assigned to this attribute
is two (02).
2 Max
Instance Maximum instance
number of an
object currently
created in this
class level of the
device. The largest instance
number of a created
object at this class
hierarchy level.