
490 Rockwell Automation Publication 750-PM001J-EN-P - October 2014
Appendix C Using DeviceLogix
Example 2 – Writing data to the network
The DeviceLogix program controls an Analog Output value which is written to
DLX Real OutSP1.
DLX Real OutSP1 can now be used as a Hardware Analog Output and used
directly with a Function Block (a DeviceLogix Datalink is not required).
Program Examples
Example 1: Selector Switch Operation
This example demonstrates how a selector switch operation similar to the feature
in the PowerFlex 700S can be achieved through the embedded DeviceLogix in
the PowerFlex 750-Series drive. A selector switch is simulated in the drive using a
combination of inputs to produce multiple outputs. Digital inputs in the drive
are used to output configurable multiple preset speeds (75 Hz, 85Hz, 95Hz, and
105Hz) to P571 [Preset Speed 1]. It is assumed that the 750-Series drive has an I/
O module that is installed in Port 4.
The following truth table represents the inputs and outputs for a 4 position
selector switch.
The Logic Map offers a high level explanation of how the above outputs are
achieved.
Drive Datalink Value
753 Port 0 P905 [Data Out A1] Port 14: DLX Real OutSP1
755 Port 13 P17 [DL To Net 01]
Inputs Outputs
Input 1Input 2Binary OutputSelector Switch
Output
000Output A
011Output B
102Output C
113Output D
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