Mitsubishi Electric FR-A820-00046 Instruction Manual page 527

Parameters
● When Pr. 291 Pulse train I/O selection = "10, 11, 20, 21, 100", this is high-speed pulse train output
for open collector output. A maximum pulse train of 55k pulses/s is output.
There are two types of pulse width: "50% duty" and "fixed ON width"; this cannot be adjusted with
the calibration parameter C0 (Pr. 900) "FM/CA terminal calibration".
*
The pulses may weaken due to stray capacitance in the wiring if the wiring is long, and the pulse
counter will be unable to recognize the pulses. Connect the open collector output to the power
source with a pull-up resistor if the wiring is too long.
Check the pulse counter specs for the pull-up resistance. The resistance should be at 80 mA of the
load current or less.
* "HIGH" indicates when the open collector output transistor is OFF.
Fig. 5-157:
● When Pr. 291 = "10, 11", the pulse cycle is 50 % duty (ON width and OFF width are the same).
● When Pr. 291 = "20, 21, 100", the pulse ON width is output at a fixed width (approx. 10 μs).
● At the "100" setting, the same pulse train from the pulse train input (terminal JOG) will be
outputted. This is used when running at a synchronized speed with more than one inverter.
(Refer to page 5-282.)
Item
Output method
Voltage between collector-emitter
Maximum permissible load current
Output pulse rate
Output resolution
Tab. 5-136: High-speed pulse train output specifications
50 kpps when the monitor output value is 100%.
FR-A800
Pulse counter
Pull up resistance *
Inverter
FM
SD
Pulse of Pr. 291 = "10, 11"
50 % duty
50 % duty
Hi *
Low
The two types of pulse width
(M) Monitor display and monitor output signal
Fig. 5-156:
High-speed pulse train output circuit
(example of connection to pulse counter)
Pulse of Pr. 291 = "20, 21, 100"
Approx. 10 μs
Hi *
Low
High-speed pulse train output specifications
NPN open collector output
30 V (max.)
80 mA
0 to 55 kpps
3 pps (excluding jitter)
I002613E
Approx. 10 μs
I002614E, I002615E
5 - 347