Interpret the Attribute Tables

Each attribute table begins with the attribute name as a heading. The tag, GSV/SSV, and MSG names for each of these attributes are the same as the attribute name listed, but with the spaces removed. For example, Inhibit Axis would be InhibitAxis.
This table provides an explanation of the information, nomenclature, and abbreviations used in the attribute tables.
Attribute Table Column Heading Descriptions
Column Heading
Description
Usage
(Implementation)
The following identifiers are used for usage:
  • Required
    This is a required attribute. It is supported for the listed control modes for each attribute.
  • Optional
    This is an optional attribute. It is supported for the listed control modes for each attribute. Optional attributes are based on the specific drive that has been associated.
  • Replicated
    For a listing of the attributes that are replicated in the drive see Identify attributes from codes.
In the Usage column, you will also see combinations of Usage and Mode, such as the following:
C PVT Closed Loop Vector Control Method
D FC Drive (Any Frequency Controlled or Vector Controlled drive device)
In addition to these combinations, there are many attributes that are applicable or not applicable to sensorless drive operation, for example, velocity-controlled drives operating without a feedback device. To accommodate these situations, the following Device Function Codes are used:
  • E Encoder present.
  • !E Encoderless/sensorless control, feedback device is not present.
Device Control Codes (mode)
The following identifiers are used for Device Function Codes:
  • Required - All = All Control Modes
  • Optional - All  = All Control Modes
If applicable only to specific implementations, the following codes will be used to denote when they apply:
  • Individual codes:
    B = Bus Power Converters (No Control Mode, No Control Method)
    G = Regenerative (Active) AC/DC Converters (No Control Mode, No Control Method)
    N = Non-Regenerative (Passive) AC/DC and DC/DC Converters (No Control Mode, No Control Method)
    E = Encoder present, Feedback Only (No Control Mode, No Control Method)
    F= Frequency Control (Velocity Control Mode, Frequency Control Method)
    P = Position Loop (Position Control Mode, Closed Loop Vector Control Method)
    V = Velocity Control Loop (Velocity Control Mode, Closed Loop Vector Control Method)
    T = Torque Control Loop (Torque Control Mode, Closed Loop Vector Control Method)
    C\D = Identifies the attributes that have a matching or replicated attributes in the associated device/drive.
  • Combination codes:
    BE = All device functions using No Control Method (N)
    O = All device functions using Open Loop Control Methods -Frequency Control (F)
    GN = All Bus Power Converters or Bus Power Supplies, Regenerative and Non-Regenerative
    C = All device functions using Closed Loop Control Methods (P, V, T)
    D = All device functions using Control Methods (FC)
  • Encoderless/sensorless drive codes:
    E Encoder present. (N, P ,V ,T with Feedback device present.)
    !E Encoderless/sensorless control, feedback device is not present.(Closed Loop Sensorless Vector and Frequency Controlled)
Access Rules
The following identifiers are used for the Access Rules:
  • Get = Get Attribute List service
    GSV = Can be read using the GSV Get System Variable instruction.
    Get/SSV = Indicates that the attribute can only be set programmatically and cannot be set by configuration software.
  • Set = Set Attribute List service
    SSV = Can be written using the Set System Variable instruction
    Set/SSV* = Indicates that the attribute cannot be set while the drive power structure is enabled (Power Structure Enable bit in CIP Axis Status is true).
    Set/SSV# = Indicates that the attribute cannot be set while the tracking command (Tracking Command bit in CIP Axis Status is true).
    Set/GSV = Indicates that the attribute can only be set when the axis is created on download and cannot be changed either online or programmatically.
    Set/SSV = Indicates that the attribute can only be set by configuration software on initial configuration download and cannot be set programmatically.
  • MSG
    Message is only used to access drive attributes for which there is no GSV/SSV access.
    In order to use an MSG instruction to access information from a drive, you will need the Attribute and Class IDs.
    Important:
     You can only access attributes with a message command if they are marked as MSG accessible in tables or text. If you attempt to access an attribute that is not marked as MSG accessible, expect inaccurate data to be returned to the controller.
  • Logix Designer
    This attribute is only available in the
    Logix Designer
     application through the Axis Properties Dialog boxes.
T
Can be accessed as an Axis Tag
Data Type
For example, DINT, UINT, SINT, REAL, BOOL
Default, Minimum, Maximum Range Limits
DB = Motion Database
Indicates that the default value comes from the database.
FD = Factory Default computed value
∞ = max float = 3.402.... x 10
38
0+ = min float = 1.2.... x 10
-38
maxpos = 2
31
/Conversion Constant
maxspd = 1000 * maxpos
minspd = minfloat
maxacc = 1000 * maxspd
minacc = minfloat
maxint = 2
15
 - 1
maxdint = 2
31
 - 1
- (dash) = Not Applicable
N/A = Not Applicable
Defaults = Unless otherwise specified, all optional attributes default to 0. All reserved and otherwise unused bits and enumerations are set to 0.
Semantics of Values
The meaning of the attribute values.
For example: Position Units / Sec.
Tag access is supported by value is valid only when Auto Tag Update of the Motion Group Object is enabled.
There may be additional information in the description that directly follows the attribute listing.
CST
Coordinated System Time
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