Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 34)

34 Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
Chapter 1 Detail Drive Configuration and Operation
Current to 800% of the motor nameplate entered in 2 [Motor NP FLA]. The
Open Loop IT function can also limit the output current if the calculation
determines it is in the overload area of operation. The Open Loop IT function
and the Motor Current Limit parameters are routed to a minimum selection, the
algebraic minimum of the inputs is used as the current limit. Also, the Closed
Loop IT function can limit the current output by the drive. The Closed Loop IT
function and the Torque Current Reference are compared and the algebraic
minimum is used for the Torque Current Reference. See the Drive Overload on
page
48 section for a description of the Open Loop and Closed Loop IT
Functions.
Datalinks Datalinks are used to transfer I/O data from a communication adapter, such as
ControlNet (20-COMM-C) or DeviceNet (20-COMM-D), to a controller.
Datalinks allow parameter values to be changed without using messaging.
Configuring Datalinks
This section contains information on configuring the Datalink parameters for
the PowerFlex 700S. There are also parameters in the communication adapters
that must be configured to use Datalinks. Refer to the ControlNet (20-COMM-
C) on page
26 and DeviceNet (20-COMM-D) on page 36 sections for more
information.
“Data In” Parameters
[Data In x Int] and [Data In x Real] parameters are inputs to the drive from the
controller and are used to write to parameters. A total of 8 parameters can be
written with the “Data In” parameters. In the 700S, each parameter is either a 16
bit integer, a 32 bit integer or a 32 bit floating point (real). This means the
datalinks parameters are 32 bits.
To write to a 16 bit or 32 bit integer parameter, that parameter must be linked to
one of the [Data In x Int] parameters.
To write to a real parameter, that parameter must be linked to one of the [Data In
x Real] parameters.
Example Configuration 1:
Writing an Integer parameter using a Datalink:
• 740 [Position Control] is linked to 707 [Data In A1 Int]
The value that is sent to [Data In A1 Int] from the controller will show up
in [Postion Control]. [Data In A1 Int] is used because [Position Control]
is an integer parameter.