Rockwell Automation 20-750-PBUS Profibus DPV1 Option Module - Manual (Page 31)

Rockwell Automation Publication 750COM-UM004B-EN-P - September 2012 31
Configuring the Option Module Chapter 3
Parameters 01 - [DL From Net 01] through 16 - [DL From Net 16]. The data
type of a Datalink can be either a 32-bit REAL (floating point) or 32-bit integer.
The number of Datalinks actively used is controlled by the connection size
configured 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 01 - [DL From Net 01] through 16 - [DL From Net 16]
control which parameters in the drive, option module, or any other connected
peripheral receive the values from 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:
From Net Parameter Value = (10000 * port number) + (Destination Parameter Number)
For example, suppose you want to use Host Parameter 01 - [DL From Net 01] to
write to Parameter 03 of an optional encoder module plugged into drive Port 5.
Using the formula, the value for
Host Parameter 01 - [DL From Net 01] would
be (10000 * 5) + (3) = 50003.
Follow these steps 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 option module; see Resetting the Option Module on page 34 .
3. Since the Logic Command and Reference is always used in the option
module, configure the parameters in the drive to accept the Logic
Command and Reference from the option module. When using the
controller for speed reference via the option module, set two fields in drive
Parameter 545 - [Speed Ref A Sel]:
a. Set the Port field for the drive (for example, 0 - PowerFlex 755).
b. Set the Parameter field to point to the drive port in which the option
module is installed (for this example, Port 4 Reference).
Also, verify that the mask parameters in the drive (for example,
Parameter 324 - [Logic Mask]) are configured to receive the desired
logic from the option module. See the drive documentation for details.
IMPORTANT Always use the Datalink parameters in consecutive numerical order,
starting with the first parameter. For example, use Host Parameters 01,
02, and 03 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.