Rockwell Automation Publication 750-PM001N-EN-P - February 2017 489
Using DeviceLogix Appendix D
Example 2: Scale Block Operation
This example demonstrates how a scale block operation similar to the feature in
the PowerFlex 700VC can be achieved through the embedded DeviceLogix in
the PowerFlex 750-Series drive. A Scale Block scales a parameter value and the
input of the block is linked to a parameter that is desired to be scaled. The scale
block also has both input and output high limits and low limit parameters.
Figure 93 - Scale Block High-Level View
Scale In Hi determines the high value for the input to the scale block.
Scale Out Hi determines the corresponding high value for the output of the scale
block.
Scale In Low determines the low value for the input to the scale block.
Scale Out Lo determines the corresponding low value for the output of the scale
block.
Scale Out Value of the block is then available for user to link to any parameter
that accepts links.
Parameter Configuration
The following DeviceLogix parameters are configured for this example:
Port Parameter
No.
Parameter Value Description
14.1 DLX Out 01 * Set to the Scale Output write
source *
A floating point output that can be
controlled by the DeviceLogix
program
14.17 DLX In 01 * Set to the Scale Input value read
source *
A floating point input that can be
read by the DeviceLogix program.
14.18 DLX In 02 Port 14: DLX Real SP2 Scale In Low
14.19 DLX In 03 Port 14: DLX Real SP3 Scale In High
14.20 DLX In 04 Port 14: DLX Real SP4 Scale Out Low
14.21 DLX In 05 Port 14: DLX Real SP5 Scale Out High
14.55 DLX Real SP2 0.0 Scale In Low value
14.56 DLX Real SP3 1800.00 Scale In High value
14.57 DLX Real SP4 0.000 Scale Out Low value
14.58 DLX Real SP5 10.00 Scale Out High value
1:14.55
1:14.56
1:14.18
1:14.17
1:14.19
1:14.20
1:14.1
1:14.21
1:14.57
1:14.58
Scale In Hi
Scale In Value
Scale 1 In Lo
Scale Out Hi
Scale Out Value
Scale Out Lo
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