Frequency arrival signals – Hitachi L300P User Manual
Page 167
L300P Inverter
Oper
ati
ons
and Monitor
ing
4–37
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). 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.
Opt.
Code
Symbol
Function Name
Output
State
Description
01
FA1
Frequency arrival
type 1 – constant
speed
ON
when output to motor is at the standard set
frequency F001
OFF
when output to motor is not at the set
frequency F001
02
FA2
Frequency arrival
type 2 – over-
frequency
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
06
FA3
Frequency arrival
type 3 – at
frequency
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
Valid for
outputs:
11, 12, AL0 – AL2
Required
settings:
F001, for FA1
C042 & C043, for FA2 & FA3
Notes:
• For most applications you will need to use
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].
• For each frequency arrival threshold, the
output anticipates the threshold (turns ON
early) by an amount equal to 1% of the
maximum frequency set for the inverter.
• The output turns OFF as the output frequency
moves away from the threshold, delayed by
an amount equal to 2% of the max. frequency.
FA2
FA1
See I/O specs on page
.
Inverter output terminal circuit
12C
12A
11C
11A
24VDC
L
L
Example (requires output configuration—
see page
+
–