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Frequency Arrival Signals
The
Frequency Arrival
group of outputs helps coordinate external systems with the
current velocity profile of the inverter. As the name implies, output [FA1] turns ON
when the output
frequency arrives
at the standard set frequency (parameter F001).
Output [FA2] relies on programmable accel/ decel thresholds for increased flexibility.
For example, you can have an output turn ON at one frequency during acceleration, and
have it turn OFF at a different frequency during deceleration. All transitions have
hysteresis to avoid output chatter if the output frequency is near one of the thresholds.
Option
Code
Terminal
Symbol
Function Name State Description
ON when output to motor is at the set frequency01 FA1 Frequency Arrival
Type 1 – Constant
Speed
OFF when output to motor is OFF, or in any
acceleration or deceleration ramp
ON when output to motor is at or above the set
frequency thresholds for, even if in acceleration or
deceleration ramps
02 FA2 Frequency Arrival
Type 2 – Over
frequency
OFF when output to motor is OFF, or during
acceleration or deceleration before the respective
thresholds are crossed
Valid for inputs: 11, AL0 – AL2
Required settings (none)
Notes:
x For most applications you will need to use only
one type of frequency arrival outputs (see
examples). However, it is possible assign both
output terminals to output functions [FA1] and
[FA2].
x For each frequency arrival threshold, the output
anticipates the threshold (turns ON early) by
1.5Hz.
x The output turns OFF as the output frequency
moves away from the threshold, delayed by
0.5Hz.
x The delay time of the output signal is 60 ms
(nominal).
x The example circuit for terminal [11] drives a
relay coil. Note the use of a diode to prevent the
negative going turn-off spike generated by the
coil from damaging the inverter’s output
transistor.
Example for terminal [11] (default output
configuration shown – see page 3-54):
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see page 54):
See I/O specs on page 4-6
RY
Inverter output
terminal circuit
CM2 11
FA1
AL1
Power
supply
Load
AL0 AL2
Inverter logic
circuit board
FA1
440
Operations and
Monitoring
4 40
Operations and
Monitoring