Rockwell Automation 2098-DSD-xxx Ultra3000 Digital Servo Drives with DeviceNet - Manual (Page 27)

Publication 2098-RM004A-EN-P – August 2002
Programming Reference 2-11
Assembly Object
(Class ID 04
H
)
Assembly Objects are objects that bind attributes of multiple objects to
allow data to or from each object to be sent over a single connection.
The Ultra3000 with DeviceNet uses Assembly Objects to send data to
and from a Master (scanner) device over an I/O connection. The
terms Input and Output are defined from the scanner's point of view:
• Output Assemblies are defined as the information that is output by
the scanner and consumed by the Ultra3000.
• Input Assemblies are consumed by the scanner or are the scanner's
input.
The Ultra3000 with DeviceNet allows you to choose between various
Input and Output Assemblies, thereby choosing the data format of the
messages that are passed back and forth between the Ultra3000 with
DeviceNet and the scanner over the I/O connection. The following
parameters select the Assembly Object instances that are exchanged
over an I/O messaging connection.
DeviceNet Object,
Class Specific Services
Service
Code Service
Name Service
Description
4B
H
Allocate_Master/Slave_
Connection_Set Requests the use of the Predefined
Master/Slave Connection Set.
4C
H
Release_Group_2_
Identifier_Set Indicates that the specified
Connections within the Predefined
Master/Slave Connection Set are
no longer desired. These
connections are to be released
(deleted).
Parameter
Instance
1
Parameter Name Description
7 I/O Receive Select Selects the Assembly Object instance that is
updated when a Poll/Change-of-State/Cyclic I/O
message is received by the drive. See page 2-48
for more information.
8 Poll Transmit (Xmit)
Select Selects the Assembly Object instance that is
transmitted by the drive over a Polled I/O
connection. See page 2-48 for more information.
9 COS/Cyclic Transmit
(Xmit) Select Selects the Assembly Object instance that is
transmitted by the drive over a
Change-of-State/Cyclic I/O connection. See
page 2-49 for more information.
1 Refer to the section on the Parameter Object for more information about parameter instances.