Rockwell Automation 20-COMM-E PowerFlex EtherNet/IP Adapter User Manual
Page 157
Using Explicit Messaging
6-31
20-COMM-E EtherNet/IP Adapter User Manual
Publication 20COMM-UM010G-EN-P
SLC 500 Controller – Formatting a Message to Read a Single Parameter Using
Read/Write Parameter Service
Figure 6.35 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
Size in Words
Data Table Address
Service
(1)
Instance
(2)
2
(3)
N40:0
Read Parameter
3 (Dec.)
Number of words to be transferred. 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.
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 integer parameter requiring the Size in Words field to be set to ‘2’. If the parameter
being read is a 16-bit integer, the Size in Words must be set to ‘1’. When using a PowerFlex 700S or PowerFlex 750-Series drive,
Output Current is a floating point number requiring the Size in Words to be set to ‘2’. See the drive documentation to determine
the size of the parameter and its data type (16-bit or 32-bit integer or REAL).