Rockwell Automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Communication Adapter User Manual - Manual (Page 140)

140 Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013
Chapter 6 Using Explicit Messaging
The following table identifies the data that is required in each box to configure a
message to write multiple parameters.
MicroLogix 1100/1400 Controller Example Scattered Write Request Data
In this message example, we use the data table addresses in Figure 75 to store the
request values to be written to these drive parameters.
See DPI Parameter Object on page 198 (Class code 0x93) for parameter
numbering.
Figure 75 or Figure 76 shows the parameter values.
Figure 75 - Example Scattered Write Request Data File for PowerFlex 7-Class Drive
General Tab Example Value Description
Channel
Comm… Command
Data Table Address
Size in Bytes
Extended Routing…
Service (1)
Service Code
Class
Instance
Attribute
1
CIP Generic
N80:0
30 (2)
RIX21:0
Custom
4C (Hex.)
93 or 9F (Hex.) (3)
0 (Dec.)
0 (Dec.)
Controller port to which the network is connected.
Used to access the Parameter Object in the adapter.
An unused controller data table address containing the message
instruction. This address is the starting word of the destination file.
Number of bytes to be transferred. Each byte size is an 8-bit integer.
An unused routing information file for the controller.
Required for scattered messages.
Code for the requested service.
Class ID for the DPI Parameter Object.
Required for scattered messages.
Required for scattered messages.
MultiHop Tab Example Value Description
To Address 10.91.100.79 IP address of the adapter connected to the drive.
(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 parameter, regardless of its actual
size. Therefore, the Size in Bytes must be set to 30. The data structure format is the same as shown on
page 120 . Maximum length
is 66 words (132 bytes), which equates to 22 parameters. For parameter numbering, see DPI Parameter Object on page 198 (Class
code 0x93).
(3) See Table 17 on page 106 for limitations of PowerFlex 7-Class drives when using DPI Parameter Object Class code 0x93 for
explicit messaging.