# Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 389

Fr-a800 series.

• Connection with a complementary output system pulse generator
Sink logic
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.
• When "2" (simple position pulse train command given by pulse train input) is set to Pr.419 Position command source
selection, the JOG terminal becomes the simple position pulse train terminal regarding of the Pr.291 setting.
• Pr.291 is the selection parameter for pulse train output/FM output. Thus, before changing the setting, check the specifications
of the device connected to the terminal FM. (For the pulse train output, refer to
 Pulse train input specification
Supported pulse method
HIGH input level
LOW input level
Maximum input pulse rate
Minimum input pulse width
Maximum wiring length
(reference value)
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, so 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.
60Hz(50Hz)
Pr. 386
(Hz)
0Hz
0
Pr. 385
*1
Limit value = (Pr.386 - Pr.385) × 1.1 + Pr.385
 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)
388
5. PARAMETERS
5.9 (D) Operation command and frequency command
Inverter
PC
JOG
2 kΩ
SD
Item
Open collector output method
Complementary output method
Limit value
Input pulse
(pulse/s)
Maximum input pulse
Source logic
24 V power
Specification
Open collector 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 μs
2 kΩ (typ) / 10 mA (typ)
2
10 m (0.75 mm
/twisted pair)
100 m (output resistance 50 Ω)
1/3750
Inverter
PC
JOG
2 kΩ
SD
page
438.)
*1  