4BChapter One: General Information 50BIntroduction
19
Definitions
Table 5: Definitions
Term Description
Attribute All elementary data types are defined in [1]
ARRAY A listing or grouping of elements of the same data type
BOOL Boolean, which can take either a 0 or 1 value
CAN Control Area Network, which is a specification of physical layer
signaling and media access control in DeviceNet
Class Code Definition of the Object Class toward which a request message is
directed, specified as either a 8-bit or 16-bit integer
Common Service A service, defined in [2], that can be used in multiple objects—each
has a fixed set of parameters that are defined in [1]
DATE Date information (not the ODVA definition of DATE)—a structure of
(1) a year of type UINT, (2) a month of type USINT, and (3) a day of
type USINT (Table 48, page 81)
Full Scale (FS) Range Defined 100% value of an attribute in its assigned units
INT Signed 16-bit integer value between -32,768 and +32, 767
Instance ID Definition of a particular instance within an Object Class
LSB Least Significant Bit
MSB Most Significant Bit
Network Access Definition of how an attribute can be accessed over the network:
R = Read Only; RW = Read/Write
ODVA Open DeviceNet Vendors Association
REAL 32-bit floating point value conforming to IEEE 754 basic single
floating point format
Service Data Carries “request specific” data
Service Type R = Request; N = Notification; M = Mandatory
SINT Signed 8-bit integer value
SHORT-STRING ASCII character string with 1 byte per character—a 1 byte length
precedes the string
STRUCT Contains more than one attribute type
UINT Unsigned 16-bit integer value between 0 and 65,535
UDINT Unsigned (double) 32-bit integer value
ULINT Unsigned (long) 64-bit integer value
USINT Unsigned 8-bit integer value between 0 and 255
WORD 16-bit string
References
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
Need help?
General
