Example 4: Forward Run/Reverse Jog
This example shows an application in which the drive runs full-speed forward and
jogs in reverse. The full scale of the potentiometer will be used.
Note: When calculating the values for the Analog Input using reverse motion, the
reverse frequency reference should be shown using a negative (-) number. Pay special
attention to signs (+/-) for values representing reverse motion.
• Minimum Frequency Reference = -15Hz (reverse)
• Maximum Frequency Reference = 60Hz
Calculations
A)
B)
Note: The negative (-) value for the Analog Offset % shows that a negative offset is
needed for 4-01.
C)
D)
Parameter Settings
4-01: 2 – Negative Input Offset Polarity
4-02: 25 – 25% Analog Input Offset
4-03: 125 – 125% Analog Input Gain
4-04: 1 – Reverse Motion Enable
Results
Mid-point Frequency =
2
60Hz – (-15Hz)
(
)
+ (-15Hz) = 22.5Hz
Analog Gain % =
60Hz
60Hz – (-15Hz)
(
)
x 100 = 125%
Analog Offset % =
-15Hz
60Hz
(
)
x 100 = -25%
x 60Hz = 60Hz
Max. Output Frequency =
1750 RPM
1750 RPM
(
)
GS1 Series AC Drive User Manual
4–35
Chapter 4: AC Drive Parameters
-15
60
Hz
22.5
Potentiometer Scale
0V
10V
4mA
20mA
60Hz
20mA
10V
-15Hz
0V
4mA
Maximum Output
Frequency
5V
12mA
Forward
Reverse
22.5Hz
0Hz
0
Summary of Contents for GS1-10P2
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