Rockwell Automation 20-750-PBUS Profibus DPV1 Option Module - Manual (Page 32)

32 Rockwell Automation Publication 750COM-UM004B-EN-P - September 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 Profibus master (controller). Next, configure
the controller to recognize and transmit I/O to the option module. See
Chapter
4, Configuring the Profibus Master .
Enable Datalinks To Read Data
The controller input image (drive-to-controller inputs) can have 0 to 16
additional 32-bit parameters (Datalinks). They 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 controller example sections in
Chapter 4 for more information on setting the
connection size.
When using a ControlLogix controller and the Generic Profile, 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.
1. Set the values of only the required number of contiguous drive-to-
controller Datalinks needed to read data from the drive and that are to be
included in the network I/O connection.
2. Reset the option module; see Resetting the Option Module on page 34 .
The option module is configured to send output data to the master (controller).
You must now configure the controller to recognize and transmit I/O to the
option module. See
Chapter 4 , Configuring the Profibus Master .
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.