Rockwell Automation 20-COMM-ER 20-COMM-ER Dual-Port EtherNet/IP Communication Adapter User Manual User Manual
Page 126
126
Rockwell Automation Publication 20COMM-UM015B-EN-P - July 2013
Chapter 6 Using Explicit Messaging
MicroLogix 1100/1400 Controller – Formatting a Message to Read a Single
Parameter Using Read/Write Parameter Service
Figure 54 - Read Parameter Message Configuration Screens
The following table identifies the data that is required in each box to configure a
message to read a single parameter.
General Tab
Example Value
Description
Channel
Comm… Command
Data Table Address
Size in Bytes
Extended Routing…
Service
(1)
Instance
(2)
1
CIP Generic
N40:0
4
(3)
RIX15:0
Read Parameter
3 (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.
Code for the requested service.
Instance number is the same as the parameter number.
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) Only drive parameters (Port 0) can be read using Parameter Object Class code 0x0F. To read a parameter of a peripheral in another
port, use DPI Parameter Object Class code 0x93 (see
).
(3) In this example, Output Current is a 32-bit parameter. If the parameter being read is a 16-bit parameter, the Size in Bytes would be
set to 2. When the parameter being read is a 32-bit REAL (floating point) data type, the size in bytes would be set to 4. See the
drive documentation to determine the size of the parameter and its data type (16-bit or 32-bit integer or REAL).