Rockwell Automation 20-COMM-D DeviceNet Adapter Series B FRN 2.xxx - Manual (Page 137)

Using Explicit Messaging 6-9
20-COMM-D DeviceNet Adapter User Manual
Publication 20COMM-UM002G-EN-P
ControlLogix Controller – Formatting a Message to Write a Single Parameter Using
RSLogix 5000 Software, Version 15.00 or Later
Figure 6.7 Parameter Write Single Message Configuration Screens
The following table identifies the data that is required in each box to
configure a message to write a single parameter.
Configuration Tab Example Value Description
Message Type
Service Type (1)
Service Code (1)
Class
Instance (2)
Attribute
Source Element
Source Length
CIP Generic
Parameter Write
10 (Hex.)
f (Hex.)
140 (Dec.)
1 (Hex.)
Accel_Time_1 (4)
2 (4)
Used to access the Parameter Object in the adapter.
This service is used to write 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.
Name of the tag for any service data to be sent from the
scanner or bridge to the adapter/drive.
Number of bytes of service data to be sent in the message.
Communication Tab Example Value Description
Path (3) My_DeviceNet_Bridge The path is the route that the message will follow.
Tag Tab Example Value Description
Name Single_Write_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 choosing a Service Type other than ‘Custom’ from the pull-down menu, an appropriate Hex. value is
automatically assigned to the Service Code box which is dimmed (unavailable).
(2) Only drive parameters (Port 0) can be written to using Parameter Object Class code 0x0F. To write to a parameter of a
peripheral in another port, use DPI Parameter Object Class code 0x93 (see page 6-10 ).
(3) Click Browse to find the path, or type in the name of the device listed in the I/O Configuration folder.
(4) In this example, Accel Time 1 is a 16-bit integer parameter requiring the tag Data Type field to be set to ‘INT’ when creating the
controller tag. If the parameter being written to is a 32-bit integer, the tag Data Type field must be set to ‘DINT’. Also, the
Source Length field on the Message Configuration screen must correspond to the selected Data Type in bytes (for example, 4
bytes for a DINT or a REAL). When using a PowerFlex 700S drive, Accel Time 1 is a floating point number requiring the Data
Type field to be set to ‘REAL’ when creating the controller tag. See the drive documentation to determine the size of the
parameter and its data type (16-bit or 32-bit integer or REAL).