6-4
Using Explicit Messaging
PowerFlex® 755 Drive Embedded EtherNet/IP Adapter User Manual
Publication 750COM-UM001A-EN-P
ControlLogix – Formatting a Message to Read Single Parameter
Figure 6.3
Get Attribute Single Message Configuration Screens
The following table identifies the data that is required in each box to
format a single read message.
Configuration Tab
Example Value
Description
Message Type
Service Type
(1)
Service Code
Class
Instance
Attribute
Source Element
Source Length
Destination
CIP Generic
Get Attribute Single
e (Hex.)
93 (Hex.)
7 (Dec.)
9 (Hex.)
—
0 bytes
Output_Current
(3)
Used to access the Parameter Object in the adapter.
This service is used to read a parameter value.
Code for the requested service.
Class ID for the DPI Parameter Object.
Instance number is the same as parameter number.
Attribute number for the Parameter Value attribute.
Leave blank (not applicable).
Number of bytes of service data to be sent in the message.
The tag where the data that is read is stored.
Communication Tab
Example Value
Description
Path
(2)
My_PowerFlex_755_Drive
The path is the route that the message will follow.
Tag Tab
Example Value
Description
Name
Single_Read_Message
The name for the message.
(1)
The default setting for Service Type is “Custom,” enabling entry of a Service Code not available from the Service Type pull-down
menu. When selecting a Service Type other than “Custom” from the pull-down menu, an appropriate Hex. value is automatically
assigned to the Service Code box which grays out (unavailable).
(2)
Click Browse to find the path, or type in the name of the device listed in the I/O Configuration folder (for this example,
My_PowerFlex_755_Drive).
(3)
In this example, Output Current is a 32-bit floating point parameter so the Data Type field must be set to “REAL” when creating
the controller tag. To read a 32-bit DINT parameter, set the tag Data Type field to “DINT.” For a 16-bit parameter, set the Data
Type field to “INT.” Refer to the drive documentation to determine the size of the parameter.
