Rockwell Automation 20B PowerFlex 70, PowerFlex 700 Reference Manual - Manual (Page 155)

Scale Blocks
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013 155
Parameter Settings
Parameter Links
Example Configuration #2
Setup a scale block to send parameter 415, [Encoder Speed] to Analog Output 1
as a 0-10V signal.
Parameter Settings
Parameter Value Description
[Trim In Select] 11, Preset 1 Preset 1 becomes the trim speed
[Scale1 In Hi] 10.0 V Hi value of Analog In 2
[Scale1 In Lo] 0 V Lo value of Analog In 2
[Scale1 Out Lo] 0 RPM Lo value of desired Trim
[Scale2 In Hi] 1800 RPM Hi value of Commanded Speed (Max Speed)
[Scale2 In Lo] 0 RPM Lo value of Commanded Speed
[Scale2 Out Hi] 180 RPM 10% of Max Speed
[Scale2 Out Lo] 0 RPM Corresponds to lo value of Commanded Speed
Destination Parameter Source Parameter Description
[Scale1 In Value] [Analog In2 Value] We are scaling Analog In 2 for our trim
[Scale2 In Value] [Commanded Speed] Use Commanded Speed as Input to Scale Block 2
[Scale1 Out Hi] [Scale2 Out Value] Use the output of Scale Block 2 to set the upper limit of Scale
Block 1 output
[Preset Speed 1] [Scale 1 Out Value] Use the scaled analog input as the trim reference into Preset
Speed 1
483
482
484
2
485
486
479
101
480
477
476
478
2
481
487
Commanded Speed
Scale2 In Hi Scale2 Out Hi
Scale2 In Value
Scale2 Out Lo
Scale2 Out
Value
Preset Speed 1
= Link
Analog In2 Value
Scale2 In Lo
Scale1 In Hi Scale1 Out Hi
Scale1 In Value
Scale1 Out Lo
Scale1 Out
Value
Scale1 In Lo
0
0
300
600
900
1200
1500
1800
1 2 3 4 5 6 7 8 9 10
Analog Out1 Value (Volts)
Scale1 In Value =
Encoder Speed (RPM)
Parameter Value Description
[Analog Out1 Sel] Scale Block1 Out Scale Block1 Output goes to Analog Out1
[Analog Out1 Hi] 10 V Hi value of Analog Output 1 corresponding to Hi value of encoder speed
[Analog Out1 Lo] 0 V Lo value of Analog Output 1 corresponding to Lo value of encoder speed
[Scale1 In Hi] 1800 RPM Hi value of the encoder speed
[Scale1 In Lo] 0 RPM Lo value of the encoder speed