Frequency Arrival Signals - Hitachi L300P Series Instruction Manual

Frequency Arrival
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
Signals
frequency arrives at the standard set frequency (parameter F001). Outputs [FA2] through [FA5]
provide variations on this function for increased flexibility, relying on two programmable accel/
decel thresholds. For example, you can have an output turn ON at one frequency during accel-
eration, 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.
Valid for
outputs:
Required
settings:
Notes:
• For most applications you will need to use
• For each frequency arrival threshold, the
• The output turns OFF as the output frequency
Opt.
Symbol Function Name
Code
01 FA1 Frequency arrival
type 1 – constant
speed
02 FA2 Frequency arrival
type 2 – over-
frequency
06 FA3 Frequency arrival
type 3 – at
frequency
11, 12, AL0 – AL2
F001, for FA1
C042 & C043, for FA2 & FA3
only one or two of the frequency arrival type
outputs (see example). However, it is possible
assign all three output terminals to output
functions [FA1] through [FA3].
output anticipates the threshold (turns ON
early) by an amount equal to 1% of the
maximum frequency set for the inverter.
moves away from the threshold, delayed by
an amount equal to 2% of the max. frequency.
Output
Description
State
ON when output to motor is at the standard set
frequency F001
OFF when output to motor is not at the set
frequency F001
ON when output to motor is at or above the FA
threshold 1(C042) during accel
OFF when the output to motor is below the FA
threshold 1 (C043) during decel
ON when output to motor is at the FA thresh-
old 1 (C042) during accel, or at C043
during decel
OFF when the output to motor is not at either
the FA threshold 1 (C042) during accel or
at C043 during decel
Example: (Requires output configuration—
see page 3–48.)
Inverter output terminal circuit
FA2
12C 12A
24VDC
+
L
–
See I/O specs on page 4–8.
4–37
L300P Inverter
FA1
11C 11A
L