7 Applications
7.4 Fixed frequency setpoint values
124 DC1 variable frequency drive 12/13 MN04020003Z-EN www.eaton.com
7.4 Fixed frequency setpoint values
Fixed frequency reference values have a higher priority than other frequency
reference values. They can be accessed individually, or in binary code, via
digital inputs DI1 to DI4.
7.4.1 Fixed frequency
Four different fixed frequency reference values can be set in parameters
P-20 to P-23 (FF1 to FF4).
When the device is running with its default configuration, fixed frequency
FF1 = 15 Hz can be accessed via digital input DI3 (control signal terminal 4).
Figure 76: Example: fixed frequencies FF1 to FF4
Example
P-12 = 0; P-15 = 9; P-21 = 20; P-22 = 30; P-23 = 40
￫
The maximum permitted setting for a fixed frequency is limited by
parameter P-01.
A fixed frequency value cannot go below a minimum limit frequency
set at parameter P-02.
If a fixed frequency is lower than the minimum frequency (P-02), the
DC1 variable frequency drive will move to the minimum frequency.
￫
The fixed frequency values can be changed during operation
(RUN).
PNU ID RUN ro/rw Value Description DS
P-20 148 ✓ rw 0 - 50 Hz Fixed frequency FF1 / speed 1 15.0
P-21 149 ✓ rw 0 - 50 Hz Fixed frequency FF2 / speed 2 0.0
P-22 150 ✓ rw 0 - 50 Hz Fixed frequency FF3 / speed 3 0.0
P-23
151 ✓ rw 0 - 50 Hz Fixed frequency FF4 / speed 4 0.0
b1 m2 Fixed frequency
0 0 FF1 (P-20)
1 0 FF2 (P-21)
0 1 FF3 (P-22)
1 1 FF4 (P-23)
DI1 DI2 DI3 DI4
23
FWD
REV
+24 V
1
4
B1
6
B2
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