Hitachi L2002 Instruction Manual page 183

Frequency Arrival Signals
The Frequency Arrival group of outputs help 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 hyster-
esis to avoid output chatter if the output frequency is near one of the thresholds.
Option Terminal
Code Symbol
01 FA1 Frequency Arrival
Type 1 – Constant
Speed
02 FA2 Frequency Arrival
Type 2 – Over-
frequency
11, 12, AL0 – AL2
Valid for outputs:
(none)
Required settings:
Notes:
•
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].
•
For each frequency arrival threshold, the output
anticipates the threshold (turns ON early) by 1.5Hz.
•
The output turns OFF as the output frequency
moves away from the threshold, delayed by 0.5Hz.
•
The delay time of the output signal is 60 ms
(nominal).
•
The example circuit for terminal [12] 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.
Output
Function Name
State
ON
OFF
ON
OFF
L200
Description
when output to motor is at the set frequency
when output to motor is OFF, or in any accelera-
tion or deceleration ramp
when output to motor is at or above the FA2
threshold (C042) during accel
when output to motor is below the FA2 threshold
(C043) during decel
Example (default output configuration
shown—see page 3–54):
Inverter output
terminal circuit
Example for terminals [AL0], [AL1], [AL2]
(requires output configuration—
4–36
see pages and 3–54):
Inverter logic
circuit board
AL0
Power
See I/O specs
supply
on page 4–6.
4–39
Inverter
2
FA1
CM2 12 11
+
RY
–
FA1
AL1 AL2
Load