Allen-Bradley PowerFlex 70 Reference Manual page 24

Analog Inputs
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Configuration #3:
• [Anlg In Config], bit 0 = "1" (Current)
• [Speed Ref A Sel] = "Analog In 1"
• [Speed Ref A Hi] = 60 Hz
• [Speed Ref A Lo] = 0 Hz
• [Analog In 1 Hi] = 20 mA
• [Analog In 1 Lo] = 4 mA
This configuration is referred to as offset. In this case, a 4-20 mA input signal
provides 0-60 Hz output, providing a 4 mA offset in the speed command.
Analog Scaling
[Speed Reference A Sel] = "Analog In 1"
[Analog In 1 Hi] [Speed Ref A Hi]
20 mA 60 Hz
[Analog In 1 Lo] [Speed Ref A Lo]
4 mA 0 Hz
20
16
12
8
4
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Configuration #4:
• [Anlg In Config], bit 0 = "0" (Voltage)
• [Speed Ref A Sel] = "Analog In 1"
• [Speed Ref A Hi] = 0 Hz
• [Speed Ref A Lo] = 60 Hz
• [Analog In 1 Hi] = 10V
• [Analog In 1 Lo] = 0V
This configuration is used to invert the operation of the input signal. Here,
maximum input (10 Volts) represents 0 Hz and minimum input (0 Volts)
represents 60 Hz.
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
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Output Hertz
60