Allen-Bradley PowerFlex 70 Reference Manual page 156

Scale Blocks
156
Parameter Links
Destination Parameter Source Parameter
[Scale1 In Value] [Encoder Speed]
477
Scale1 In Hi
Encoder Speed
415 476 Scale1 In Value
478 Scale1 In Lo
Example Configuration #3
In this configuration Analog In 2 is a –10V to +10V signal which corresponds to
–800% to +800% motor torque from another drive. We want to use the –200%
to +200% range (–2.5V to +2.5V) of that motor torque and correspond it to –
100% to +100% of the PI Reference.
2.5
1.5
0.5
-0.5
-1.5
-2.5
-100 -80 -60 -40 -20 0 20 40 60 80 100
PI Reference
Parameter Settings
Parameter Value
[Scale 1 In Hi] 2.5 V
[Scale 1 In Lo] –2.5V
[PI Reference Sel] 25, Scale Block1 Out
[PI Reference Hi] 100 %
[PI Reference Lo] –100 %
Parameter Links
Destination Parameter Source Parameter
[Scale1 In Value] [Analog In2 Value]
477
Scale1 In Hi
Analog In2 Value
2 476 Scale1 In Value
478
Scale1 In Lo
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
Description
We are scaling Encoder Speed
343
Analog Out1 Hi
Scale1 Out
Analog Out1
481
Value
Analog Out1 Lo 344
Description
2.5 V = 200% torque from other drive
–2.5 V = –200% torque from other drive
The PI Reference becomes the output of the scale block
100% PI Reference corresponds to 200% torque from other drive
–100% PI Reference corresponds to –200% torque from other drive
Description
We are scaling Analog In 2 value
460
PI Reference Hi
Scale1 Out
481
Value
461
PI Reference Lo
= Link
= Link
PI Reference