Hitachi WJ C1 Series

Chapter 9 Inverter Functions
9-13-3
9.13.3 Outputting a Signal When the Output Frequency Is Close to the Set Value
 How to detect and tell the system that the output frequency to the motor is close to the set
value?
 Assigning "Set frequency reached [FA3] (06)"/"Set frequency reached 2 [FA5] (25)" to one of the
output terminal functions ([C021]/[C022]/[C026]) enables the inverter to output command
frequency arrival signals.
 Two independent set frequency reached signals [FA3] and [FA5] can be assigned to the output
terminals.
 The frequency setting for turning [FA3] on during acceleration and off during deceleration is set
by "Arrival frequency during acceleration [C042]"/"Arrival frequency during deceleration
[C043]", respectively. Similarly, set "Arrival frequency 2 during acceleration [C045]"/"Arrival
frequency 2 during deceleration [C046]" for [FA5].
Code
Item
Description
Data
[C042]
Arrival frequency
during acceleration
During acceleration, [FA3] turns on when the
output frequency reaches this set value.
0.00 to 590.00 (Hz)
[C043]
Arrival frequency
during deceleration
During deceleration, [FA3] turns on when the
output frequency reaches this set value.
0.00 to 590.00 (Hz)
[C045]
Arrival frequency 2
during acceleration
During acceleration, [FA5] turns on when the
output frequency reaches this set value.
0.00 to 590.00 (Hz)
[C046]
Arrival frequency 2
during deceleration
During deceleration, [FA5] turns on when the
output frequency reaches this set value.
0.00 to 590.00 (Hz)
[C021]
[C022]
[C026]
Output terminal
function
Set frequency reached [FA3]:
This signal turns on/off when the output
frequency reaches the [C042]/[C043] set
values.
06
Set frequency reached 2 [FA5]:
This signal turns on/off when the output
frequency reaches the [C045]/[C046] set
values.
25
fon: 1% of the maximum frequency
foff: 2% of the maximum frequency
[C042]
[C043]
fon
foff
Output
frequency
[FA2] Output
foff
fon
[C045]
[C046]
[FA4] Output
(Example of operation)
When the maximum frequency is 60 Hz,
and [C042] = [C043] = 50 Hz
- fon = 60 × 0.01 = 0.6 Hz
- foff = 60 × 0.02 = 1.2 Hz
- During acceleration:
On at 50 - 0.6 = 49.4 Hz
- During deceleration:
Off at 50 - 1.2 = 48.8 Hz
ON
ON
Q
A
!