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5. PARAMETERS
5.6 (D) Operation command and frequency command
5.6.5 Frequency setting via pulse train input
A pulse train input to the terminal JOG can be used to set the inverter's speed command.
Moreover, speed synchronized operation of an inverter can be performed by using the pulse train output together with the
terminal JOG.
*1 Function assigned to Pr.185 JOG terminal function selection.
Selection of pulse train input (Pr.291)
• Setting Pr.291 Pulse train I/O selection = "1" and Pr.384 Input pulse division scaling factor "0" changes the function
of terminal JOG to a pulse train input so that the frequency can be set to the inverter. In the initial setting, the JOG signal
is assigned to terminal JOG. A maximum pulse train of 100k pulses/s can be input.
• Connection with an open collector output system pulse generator
*1 When the wiring length is long with open collector outputs, the influence of stray capacitance causes the pulse to flatten out and prevents the
input pulse from being recognized. When the wiring length is long (10 m or longer of shielded twisted pair cable with a recommended cable gauge
of 0.75 mm
2
), connect the open collector output signal to the power supply by an external pull-up resistor. The table below shows the reference
resistance values for wiring length. The stray capacitance of the wiring changes considerably according to how the cable is laid, thus the above
wiring lengths are not guaranteed values. When using a pull-up/down resistor, check the permissible power of the resistor and the permissible
load current of the output transistor, and use within the permissible range.
• Connection with a complementary output system pulse generator
• When pulse train input is selected, the function assigned to terminal JOG by Pr.185 JOG terminal function selection is
invalid.
Pr. Name Initial value Setting range Description
291
D100
Pulse train I/O selection 00
The JOG signal is assigned to terminal JOG.
*1
1 Pulse train input is assigned to terminal JOG.
384
D101
Input pulse division scaling
factor
0 0 Pulse train input disabled
1 to 250 Division ratio on the input pulse. The frequency
resolution on the input pulse changes according to this
setting.
385
D110
Frequency for zero input
pulse
0 Hz 0 to 590 Hz Sets the frequency when the input pulse is zero (bias).
386
D101
Frequency for maximum
input pulse
60 Hz 0 to 590 Hz Sets the frequency when the input pulse is maximum
(gain).
Wiring length Less than 10 m 10 to 50 m 50 to 100 m
Pull-up/down resistor Not required 1 kΩ 470 Ω
Load current (reference) 10 mA 35 mA 65 mA
JOG
PC
SD
Sink logic
Inverter
Pull up resistor ∗1
2 kΩ
JOG
PC
SD
Source logic
Inverter
Pull down resistor ∗1
2 kΩ
JOG
PC
SD
Sink logic
Inverter
2 kΩ
24 V power
Source logic
24 V power
JOG
PC
SD
Inverter
2 kΩ
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