DeviceNet Module Installation and Operation Manual
43
AC/DC Drive Object
Class code 0x2A — This object models the functions specific to an AC or DC Drive. e.g., speed ramp,
torque control, etc.
Table 60. AC/DC Drive Object Class Attributes.
Table 61. AC/DC Drive Object Instance Attributes.
Attribute
ID
Name
Data
Type
Access
Rules
Description
Default
Value
1
Revision
UINT
Get
Revision of this object
1
2
Max Instance
UINT
Get
Maximum instance number of an object currently
created in this class level of the device
1
6
Max ID of Class
Attributes
UNIT
Get
The attribute ID number of the last class attribute
of the class definition implemented in the device
7
7
Max ID of Instance
Attributes
UNIT
Get
The attribute ID number of the last instance
attribute of the class definition implemented in the
device
46
Attribute
ID
Name
Data
Type
Access
Rules
Description
Default
Value
1
Number of
Attributes
USINT
Get
Number of Attributes supported
16
2
Attribute List
USINT
(ARRAY)
Get
List of Attributes supported
-
3
At Reference
BOOL
Get
Denotes if ASD Speed Actual (Attrib. #7) is at
Speed Reference (Attrib. 8) in speed control
mode, or if Torque Actual (Attrib. #11) is at
Power Actual (Attrib. 15) in torque control mode
0 = ASD speed/torque not at reference value
1 = ASD speed/torque at reference value
-
4
Net Reference
BOOL
Get/Set
Requests torque or speed reference to be local or
from network
0 = Set Reference not DeviceNet Control
1 = Set Reference at DeviceNet Control
Note: The status of torque or speed reference is
reflected in attribute 29, RefFromNet
-
6
Drive Mode
USINT
Get
0 = Vendor-specific mode
1 = Open loop speed (Frequency)
2 = Closed loop speed control
3 = Torque control
4 = Process control (e.g., PI)
5 = Position control
-
7
Speed Actual
INT
Get
ASD drive speed (best approximation)
Units: rpm
-
8
Speed
Reference
INT
Get/Set
Speed reference
Units: rpm
-
9
Current Actual
INT
Get
Motor phase current
Units: 100 mA
-
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