Rockwell Automation 20-COMM-Q ControlNet Adapter User Manual
Page 147
Using Explicit Messaging
6-19
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
ControlLogix Controller – Formatting a Message to Write Multiple Parameters Using
RSLogix 5000 Software, Any Version
Figure 6.20 Scattered Write Multiple Message Configuration Screens
The following table identifies the data that is required in each box to
configure a message to write multiple parameters.
Configuration Tab
Example Value
Description
Message Type
Service Type
(1)
Service Code
(1)
Class
Instance
Attribute
Source Element
Source Length
Destination
CIP Generic
Custom
4c (Hex.)
93 or 9F (Hex.)
(3)
0 (Dec.)
0 (Hex.)
Scattered_Write_Request
(4)
30
Scattered_Write_Response
Used to access Parameter Object in the adapter.
Required for scattered messages.
Code for the requested service.
Class ID for the DPI Parameter Object.
Required for scattered messages.
Required for scattered messages.
Name of the tag for any service data to be sent from
scanner or bridge to the adapter/drive.
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_Drive
The path is the route that the message will follow.
Tag Tab
Example Value
Description
Name
Scattered_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)
Click Browse to find the path, or type in the name of the device listed in the I/O Configuration folder.
(3)
See
Table 6.A on page 6-2
for limitations of PowerFlex 7-Class and PowerFlex 750-Series drives when using DPI Parameter Object
Class code 0x93 or Host DPI Parameter Object Class code 0x9F for explicit messaging.
(4)
In this example, we are writing to five parameters. Each parameter being written to requires an array of three INT registers.
Therefore, a controller tag was created with its Data Type field set to ‘INT[15]’. Also, the Source Length field on the Message
Configuration screen must correspond to the selected Data Type in bytes (for this example, 30 bytes for an INT[15] array).
Scattered write messages always assume that every parameter being written to is a 32-bit integer, regardless of its actual data
type. Maximum length is 132 bytes or 66 words which equates to 22 parameters. For parameter numbering, see
(Class code 0x93) or
Host DPI Parameter Object on page C-30
(Class code 0x9F).