Allen-Bradley PowerFlex 70 Reference Manual page 23

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Analog Scaling
[Speed Reference A Sel] = "Analog In 1"
[Analog In 1 Hi] [Speed Ref A Hi]
10V 60 Hz
[Analog In 1 Lo] [Speed Ref A Lo]
0V 0 Hz
Configuration #2:
• [Anlg In Config], bit 0 = "0" (Voltage)
• [Speed Ref A Sel] = "Analog In 1"
• [Speed Ref A Hi] = 30 Hz
• [Speed Ref A Lo] = 0 Hz
• [Analog In 1 Hi] = 10V
• [Analog In 1 Lo] = 0V
This is an application that only requires 30 Hz as a maximum output frequency,
but is still configured for full 10 volt input. The result is that the resolution of the
input has been doubled, providing only 3 Hz change per input volt
(Configuration #1 is 6 Hz/Volt).
12
10
8
6
4
2
0 6 12 18
Analog Scaling
[Speed Reference A Sel] = "Analog In 1"
[Analog In 1 Hi] [Speed Ref A Hi]
10V 30 Hz
[Analog In 1 Lo] [Speed Ref A Lo]
0V 0 Hz
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
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Output Hertz
24 30 36 42 48 54
Output Hertz
Analog Inputs
60
60
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