21
♦
By using terminals No. 8 and 9, the output frequency can be controlled with
the PWM signal.
·
No. 8: Frequency setting signal changeover input terminal (SW2)
(OFF: PWM signal, ON: controlled with signal set in parameter
P09)
·
No. 9: PWM signal input terminal
3
8
PWM
signal
SW2
Note 1)
When controlling the output frequency with the PWM
signal, parameters P22, P23 and P24 must be set.
Note 2)
Use a PWM signal transistor (Tr) that has the following
capabilities:
·
Maximum rated voltage : 50VDC or more
·
Rated current
: 50mA or more
9
■
Precautions
1. Use shielded wires for all control signal wires and keep them more than 20
cm from power wiring.
2. Maximum control signal wire length is 30m or less.
3. The control circuit's input signal is a minute signal, so use two minute
signal contacts in parallel or use a twin contact to prevent contact faults
when inputting the contact.
4. No-voltage contact signal or open-collector outputs signal should be used
with control terminals No. 5 to 9.
(If a voltage signal is applied across these terminals, the internal electronics
may be damaged.)
∗
Input circuit specifications are shown below. Take special care to avoid
loop or leakage current.
5. When an inductive load is to be driven by an open-collector output, be sure
to use a freewheel diode.
12VDC
2k
Ω
Terminals
No.5 to 9
X
e.g.24VDC
power source
Freewheel diode
Inverter internal circuit
Inverter
internal circuit
Terminal
No.10
Terminal
No.11
+
Terminal
No.3
