Configuring a master-slave hierarchy – Rockwell Automation 25-COMM-D PowerFlex 525 DeviceNet Adapter User Manual
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Rockwell Automation Publication 520COM-UM002A-EN-E - April 2013
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Configuring the Adapter
Chapter 3
Configuring a Master-Slave Hierarchy
The controller I/O image can have anywhere from zero to eight (four In and four
Out) additional 16-bit parameters called Datalinks. They are configured using
Host parameters C161 [Opt Data In 1] through C164 [Opt Data In 4], and
C165 [Opt Data Out 1]
through C168 [Opt Data Out 4]. The number of
Datalinks actively used is controlled by the connection size in the controller and
the in/out parameters. See the respective controller example sections in
for more information on setting the connection size.
When using a ControlLogix or CompactLogix controller and the Generic
Profile, or a MicroLogix 1100/1400 controller, configure the Datalink
parameters now as described in this section.
Enabling Datalinks To Write Data
Host parameters C161 [Opt Data In 1] through C164 [Opt Data In 4] control
which parameters in the drive receive values from the network. To configure
these parameters, set them to the drive parameter number you want to write them
to.
The following steps are required to enable Datalinks to write data:
1.
Set the values of only the required number of contiguous controller-to-
drive Datalinks needed to write data to the drive and that are to be
included in the network I/O connection.
2.
Reset the adapter by power cycling the drive.
After the above steps are complete, the adapter is ready to receive input data and
transfer status data to the master (controller). Next, configure the controller to
recognize and transmit I/O to the adapter. See
Enabling Datalinks To Read Data
Host parameters C165 [Opt Data Out 1] through C168 [Opt Data Out 4]
configure which parameters in the drive, adapter, or any other connected
IMPORTANT
Always use the Datalink parameters in consecutive numerical order, starting
with the first parameter. For example, use Host parameters C161, C162, and
C163 to configure three Datalinks to write data. Otherwise, the network I/O
connection will be larger than necessary, which needlessly increases controller
response time and memory usage.
IMPORTANT
Always use the Datalink parameters in consecutive numerical order, starting
with the first parameter. For example, use Host parameters C165, C166, and
C167 to configure three Datalinks to read data. Otherwise, the network I/O
connection will be larger than necessary, which needlessly increases controller
response time and memory usage.