Mitsubishi Electric 800 Series Instruction Manual page 223

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.
Pr.
291 Pulse train I/O selection
D100
384 Input pulse division scaling
D101 factor
385 Frequency for zero input
D110 pulse
386 Frequency for maximum
D101 input pulse
*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
Sink logic
∗1
Pull up resistor
*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
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.
Wiring length
Pull-up/down resistor
Load current (reference)
• Connection with a complementary output system pulse generator
24 V power
NOTE
• When pulse train input is selected, the function assigned to terminal JOG by Pr.185 JOG terminal function selection is
invalid.
222
5. PARAMETERS
5.6 (D) Operation command and frequency command
Name Initial value
0
0
0 Hz
60 Hz
Inverter
PC
JOG
2 kΩ
SD
2
), connect the open collector output signal to the power supply by an external pull-up resistor. The table below shows the reference
Less than 10 m 10 to 50 m
Not required 1 kΩ
10 mA 35 mA
Sink logic
Inverter
PC
JOG
2 kΩ
SD
Setting range
0
The JOG signal is assigned to terminal JOG.
1 Pulse train input is assigned to terminal JOG.
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.
0 to 590 Hz Sets the frequency when the input pulse is zero (bias).
0 to 590 Hz Sets the frequency when the input pulse is maximum
(gain).
Source logic
Inverter
PC
JOG
2 kΩ
Pull down resistor ∗1
SD
50 to 100 m
470 Ω
65 mA
Source logic
24 V power
Description
Inverter
PC
JOG 2 kΩ
SD
*1