Programming Your Application 6-7
605C Frequency Inverter
HYSTERISIS is used to make the function block resistant to noise on the input. It operates so
that if the last non-inverted output was TRUE then the comparison level used is LEVEL -
HYSTERISIS. If the last non-inverted output was FALSE then the comparison level used is
LEVEL + HYSTERISIS.
LEVEL
RAW INPUT
VALUE
INVERTHYSTERISIS
The input voltage or current is converted to an equivalent percentage by the Inverter's analog
input electronics. The percentage generated by a given input voltage depends on the hardware
range selected, as shown in the table below. The hardware range is selected using switch bank
SW1 on the control PCB, as described under the ANALOG INPUT function block.
Nominal Hardware Range Hardware Input Equivalent % Suggested Level
0 to 20mA 0mA
20mA
0%
44%
22%
-10 to 10V -10V
10V
0%
100%
50%
0 to 10V 0V
10V
0%
100%
50%
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