Using Explicit Messaging
6-37
PowerFlex® 755 Drive Embedded EtherNet/IP Adapter User Manual
Publication 750COM-UM001A-EN-P
MicroLogix 1100 – Formatting a Message to Read Multiple
Parameters
Figure 6.44 Custom Scattered Read Message Configuration Screens
The following table identifies the data that is required in each box to
format a multiple read message.
General Tab
Example Value
Description
Channel
Comm… Command
Data Table Address
Receive
Send
Size in Bytes
Receive
Send
Extended Routing…
Service
(1)
Service Code
Class
Instance
Attribute
1
CIP Generic
N60:0
N70:0
40
(2)
40
RIX19:0
Custom
4D (Hex.)
93 (Hex.)
0 (Dec.)
0 (Dec.)
Controller port to which the EtherNet/IP 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 response file.
This address is the starting word of the request file.
Each byte size is an 8-bit integer.
Number of bytes to be received.
Number of bytes to be sent.
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
selecting a Service 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)
In this example, we are reading five 32-bit REAL (floating point) parameters. Each parameter being read requires four contiguous 16-bit
words. Scattered read messages always assume that every parameter being read is a 32-bit parameter, regardless of its actual size.
Therefore, the Size in Bytes must be set to 40. The data structure format is shown in
. Maximum message
length is 128 words (256 bytes), which equates to 32 parameters.
