Mitsubishi Electric 800 Series Instruction Manual page 224

 Pulse train input specification
Item
Supported pulse method
HIGH input level
LOW input level
Maximum input pulse rate
Minimum input pulse width
Input resistance/load current
Maximum wiring length Open collector output method
(reference value)
Complementary output method
Detection resolution
*1 The wiring length of complementary output is dependent on the output wiring specification of the complementary output unit. The stray
capacitance of the wiring changes considerably according to how the cable is laid, thus the maximum wiring length is not a guaranteed value.
 Adjustment of pulse train and frequency (Pr.385, Pr.386)
• The frequency during zero input pulse and maximum input pulse can be set with Pr.385 Frequency for zero input pulse
and Pr.386 Frequency for maximum input pulse, respectively.
60 Hz
Pr. 386
(Hz)
0 Hz
0
Maximum input pulse
Pr. 385
Limit value = (Pr.386 - Pr.385)  1.1 + Pr.385
*1
 How to calculate the input pulse division scaling factor (Pr.384)
• The maximum number of pulses can be calculated by the following formula with Pr.384 Input pulse division scaling
factor: Maximum number of pulses (pulse/s) = Pr.384  400 (maximum 100k pulses/s) (number of detectable pulses =
11.45 pulses/s)
• For example, to run the invert at 0 Hz when pulse train input is zero and at 30 Hz when pulse train is 4000 pulses/sec, set
the inverter as follows:
Pr.384 = 10 (maximum number of input pulses 4000 pulses/s)
Pr.385 = 0 Hz, Pr.386 = 30 Hz (pulse train limit value 33 Hz)
NOTE
• The priority of the frequency command by the external signals is "JOG operation > multi-speed operation > terminal 4
analog input". When pulse train input is enabled (Pr.291 = "1" and Pr.384 ≠ "0"), terminal 2 analog input becomes invalid.
Specification
Open collector output.
Complementary output. (24 V power supply voltage)
20 V or more (voltage between JOG and SD)
5 V or less (voltage between JOG and SD)
100k pulses/s
2.5 us
2 kΩ (typ)/10 mA (typ)
2
10 m (0.75 mm /twisted pair)
100 m (output resistance 50 Ω)
1/3750
Limit value
Input pulse
(pulse/s)
*1
5.6 (D) Operation command and frequency command
3
4
5
5
5
6
7
8
9
10
223
5. PARAMETERS