Rockwell Automation 20-COMM-E PowerFlex EtherNet/IP Adapter User Manual
Page 160
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Using Explicit Messaging
20-COMM-E EtherNet/IP Adapter User Manual
Publication 20COMM-UM010G-EN-P
SLC 500 Controller – Formatting a Message to Write a Single Parameter Using
Read/Write Parameter Service
Figure 6.39 Write Parameter Message Configuration Screens
The following table identifies the data that is required in each box to
configure a message to write a single parameter.
General Tab
Example Value
Description
Size in Words
Data Table Address
Service
(1)
Instance
(2)
1
(3)
N50:0
Write Parameter
140 (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 source 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 written to using Parameter Object Class code 0x0F. To write to a parameter of a peripheral
in another port, use DPI Parameter Object Class code 0x93 (see
).
(3)
In this example, Accel Time 1 is a 16-bit integer parameter requiring the Size in Words field to be set to ‘1’. If the parameter being
written to is a 32-bit integer, the Size in Words must be set to ‘2’. When using a PowerFlex 700S or PowerFlex 750-Series drive,
Accel Time 1 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).