Rockwell Automation 20-COMM-Q ControlNet Adapter User Manual
Page 188
6-60
Using Explicit Messaging
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
SLC 500 Controller – Formatting a Message to Write Multiple Parameters Using
Generic Get/Set Attribute Service
Figure 6.76 Custom Scattered Write Multiple Message Configuration Screen
The following table identifies the data that is required in each box to
configure a message to write multiple parameters.
General Tab
Example Value
Description
1747-SCNR Slot
Size in Words (Receive Data)
Size in Words (Send Data)
Data Table Address (Receive Data)
Data Table Address (Send Data)
Message Timeout
ControlNet Addr
Service
(1)
Service Code
Class
Instance
Attribute
1
15
(2)
N90:0
N80:0
500
2
Custom
4C (Hex.)
93 or 9F (Hex.)
(3)
0 (Dec.)
0 (Dec.)
The chassis slot occupied by the scanner.
Number of words to be received. Each word size is a 16-bit integer.
Number of words to be sent (written). Each word size is a 16-bit integer.
An unused controller data table address containing the message
instruction. This address is the starting word of the destination file.
An unused controller data table address containing the message
instruction. This address is the starting word of the source file.
The time (in milliseconds) that the message must be completed.
The node address of the adapter connected to the drive.
Required for scattered messages.
Code for the requested service.
Class ID for the DPI Parameter Object.
Required for scattered messages.
Required for scattered messages.
(1)
The default setting for Service is ‘Custom’, enabling entry of a Service Code not available from the Service pull-down menu. When choosing a
Service 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)
In this example, we are writing to five parameters. Each parameter being written to requires three contiguous 16-bit words. Scattered write messages
always assume that every parameter being written to is a 32-bit integer, regardless of its actual data type. The data structure format is the same as
shown on
page 6-53
. Maximum length is 66 words, which equates to 22 parameters. For parameter numbering, see
Host DPI Parameter Object on page C-30
(Class code 0x9F).
(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.