73BAssembly Object
7BChapter Four: Operation
58
Assembly Object
The Assembly Object (Class Code 04
hex
) stores data and groups attributes from multiple objects,
allowing data to or from each object to be sent or received using a single
explicit
messaging
command.
Two instances of the Assembly Object (Table 25) are supported with one instance attribute (Table
26, page 59) and one DeviceNet common service (Table 27, page 59).
Assembly Object Instances
Each Assembly Object instance represents a different set of data. The format for each instance is
fixed by the Predefined Master/Slave Connection Set and cannot be altered [1].
Table 25: Assembly Object Instances
Assembly
Instance
ID # (hex)
Data
Type
Class Code (hex) /
Object Model
Instance
ID #
(hex)
Attribute
ID #
(hex)
User Mode
Access
Cal Mode
Access
USINT
0x30
Device
Supervisor
01
0x0C
Exception
Status
R R
02
UINT
SASO
0x31
Value (Pressure)
01
0x06
16-Bit
Pressure
R R
USINT
0x30
Device
Supervisor
01
0x0C
Exception
Status
R R
05
REAL
SASO
0x31
Value (Pressure)
01
0x06
Corrected
Pressure
R R
Assembly instance ID #02 reports:
•
Exception status from the S-Device Supervisor Object (refer to
Exception Status
, page
75).
•
Scaled 16-bit pressure value from the S-Analog Sensor Object (refer to
Reporting the
Pressure Value
, page 31).
Instance ID #05 reports:
•
Exception status from the S-Device Supervisor Object (see
Exception Status
, page 75).
•
Corrected pressure value in units from the S-Analog Sensor Object (refer to
Reporting
the Pressure Value
, page 31).
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