Enable datalinks to read data – Rockwell Automation 20-750-CNETC PowerFlex Coaxial ControlNet Option Module User Manual
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Rockwell Automation Publication 750COM-UM003B-EN-P - November 2012
Chapter 3
Configuring the Option Module
After the above steps are complete, the option module 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 option module. See
Enable Datalinks To Read Data
The controller input image (drive-to-controller inputs) can have 0 to 16
additional 32-bit parameters (Datalinks). The Datalinks are configured using
Host Parameters 17 - [DL To Net 01] through 32 - [DL To Net 16]. The
number of Datalinks actively used is controlled by the connection size in the
controller. See the respective controller example sections in
for more
information on setting the connection size.
When using a ControlLogix controller and the Generic Profile—or a PLC-5 or
SLC 500 controller, configure the Datalink parameters now as described in this
section.
Host Parameters 17 - [DL To Net 01] through 32 - [DL To Net 16] configure
which parameters in the drive, option module, or any other connected peripheral
send the values to the network. You can use the PowerFlex 20-HIM-A6 or 20-
HIM-C6S HIM, or another drive configuration tool such as Connected
Components Workbench, DriveExplorer, or DriveExecutive software to select
the drive or peripheral by port number and the parameter by name. As an
alternate method, the parameter value can be set manually by number using this
formula:
To Net Parameter Value = (10000 * Port Number) + (Origination Parameter Number)
For example, suppose you want to use
Host Parameter 17 - [DL To Net 01] to
read Parameter 2 of an optional I/O module plugged into drive Port 6. Using the
formula, the value for
Host Parameter 17 - [DL To Net 01] would be (10000 * 6)
+ (2) = 60002.
Follow these steps to enable Datalinks to read data.
IMPORTANT
Always use the Datalink parameters in consecutive numerical order, starting
with the first parameter. For example, use Host Parameters 17, 18, 19, 20, and
21 to configure five Datalinks to read data. Otherwise, the network I/O
connection will be larger than necessary, which needlessly increases controller
response time and memory usage.
TIP
When using a ControlLogix controller and an RSLogix 5000 drive Add-On
Profile, version 16.00 or later, there is no need to configure Datalink
parameters at this time. They will be assigned when configuring the RSLogix
5000 drive Add-On Profile (see