Rockwell Automation 1747-SDN SLC 500 DeviceNet Scanner Module User Manual - Manual (Page 96)

Publication 1747-UM655B-EN-P - June 2007
96 DeviceNet Explicit Messaging
•
Class (hex)/(dec)
Possible Classes are 0…FF (hex).
See Volume 1 of the CIP Common Specification for the list of
defined Classes.
You may either enter in a hexadecimal Class value in the (hex)
field or a decimal Class value in the (dec) field.
•
Instance (hex)/(dec)
Possible Instances are 0…FFFF (hex).
See Volume 1 of the CIP Common Specification for the list of
valid Instances for each Class.
You may either enter in a hexadecimal Instance value in the
(hex) field or a decimal Instance value in the (dec) field.
•
Attribute (hex)/(dec)
Possible Attributes are 0…FF (hex).
See Volume 1 of the CIP Common Specification for the list of
valid Attributes for each Class.
You may either enter in a hexadecimal Attribute value in the
(hex) field or a decimal Attribute value in the (dec) field. Note
that if the value of the Attribute is set to 0, the DeviceNet
scanner does not transmit an Attribute byte. Some Service Codes
require that a zero-value Attribute byte be transmitted. For these
Service Codes, the first byte of the Send Data must be set to zero
and the Size of Send Data (Bytes) must include this additional
byte.
Definitions for Message Status Bits on the General Tab
The table below lists the various status bits associated with the DEM
instruction as displayed in the DEM instruction setup screen.
DEM Instruction Setup Screen Status Bits
Bit Definition Bit Mnemonic Bit Address
Abort AB 08
Error ER 12